You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@myfaces.apache.org by Thomas Andraschko <an...@gmail.com> on 2013/05/13 13:17:15 UTC

Unwrap CC ValueExpression?

Hi,

is it possible unwrap a CC ValueExpresion?
i found a bug with PrimeFaces p:media inside a composite component and i
would like to fix it.

If you pass the EL via a CC attr (e.g. #{myController.content}) and attach
it to p:media (e.g. #{cc.attrs.content}),
p:media gets the ValueExpression and saves them in the session, to later
stream the content in a resource request.
Later the ResourceHandler evaluates it and tries to get the value of
#{cc.attrs.content}, which can't work ofc.

So is it possible to extract the "real" EL before store it in the session?
Is there a solution which also works in mojarra?


Regards,
Thomas

Re: Unwrap CC ValueExpression?

Posted by "l.penet@senat.fr" <l....@senat.fr>.
On 13/05/2013 14:35, Thomas Andraschko wrote:
> Hi Christian,
>
> i don't understand your solution exactly.
> Whats the difference?
> It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
> evaluated without #pushComponentToEL(cc).
> Also #createView should be avoided for such a request IMO because of
> performance.
I use the following dirty/kludgy code for such needs :

         public static String getMappedValueExpression(ValueExpression 
valueExpression) {
             ContextAwareTagValueExpression ctxAware = 
(ContextAwareTagValueExpression)valueExpression;
             if(ctxAware != null) {
                 return 
getMappedValueExpression((WrappedValueExpression)ctxAware.getWrapped());
             }
             return valueExpression.getExpressionString();
         }

         public static String 
getMappedValueExpression(WrappedValueExpression wrappedExpression) {
             String exprString = 
wrappedExpression.getExpressionString().replace("#{", "").replace("}", "");
             String ret = exprString;
             try {

                 Field valueExpression = 
WrappedValueExpression.class.getDeclaredField("valueExpression");
                 valueExpression.setAccessible(true);
                 ValueExpressionImpl vei = (ValueExpressionImpl) 
valueExpression.get(wrappedExpression);
                 Field varMapper = 
ValueExpressionImpl.class.getDeclaredField("varMapper");
                 varMapper.setAccessible(true);
                 VariableMapperImpl vmi = (VariableMapperImpl) 
varMapper.get(vei);
                 if(vmi != null) {
                     String[] components = exprString.split("\\.");
                     components[0] = 
vmi.resolveVariable(components[0]).getExpressionString().replace("#{", 
"").replace("}", "");
                     ret = "";
                     for(int i = 0 ; i < components.length ; i++) {
                         if(i != 0) {
                             ret += ".";
                         }
                         ret += components[i];
                     }
                 }
             } catch (Exception ex) {
                 logger.error("Exception lors du mapping de l'expression 
EL " + exprString, ex);
             } finally {
                 return ret;
             }
         }

I will gladly adopt a better solution but this one works for me. :-)

Regards,

Ludovic
|
| AVANT D'IMPRIMER, PENSEZ A L'ENVIRONNEMENT.
|

Re: Unwrap CC ValueExpression?

Posted by Thomas Andraschko <an...@gmail.com>.
I believe it would be possible to solve it with ->

1) check if current component (media etc.) is inside a CC
2) get the CC
3) check if expressionString contains ".attrs." and extract the attribute
name
4) get the expression via the CC#getAttributes(attributeName)

But don't know if it works in all cases.
Maybe there exists a better and cleaner solution?

2013/5/13 Thomas Andraschko <an...@gmail.com>

> 3.5.4 but thats indepenent :)
>
>
>
> 2013/5/13 Christian Beikov <ch...@gmail.com>
>
>> What PF version are you using?
>>
>>
>> 2013/5/13 Thomas Andraschko <an...@gmail.com>
>>
>> > It's really view independent and  my Controller is RequestScoped.
>> > The only problem is that currently graphicImage/media/filedownload are
>> > unusable in a CC, if you need to pass the EL into the CC.
>> >
>> >
>> > 2013/5/13 Christian Beikov <ch...@gmail.com>
>> >
>> > > The difference is that it can handle the view based scopes where the
>> > > primefaces impl can't. But as I just realize this won't help you at
>> all.
>> > > Sorry but for now I can't think of a reliable general purpose way to
>> > > retrieve the contents without rebuilding the view, I have to think
>> about
>> > > it.
>> > > Do you need any context information like iteration status or so to
>> > evaluate
>> > > the expression to a meaningful value or is it completely independent
>> of
>> > the
>> > > view?
>> > > What scope has the myController?
>> > >
>> > >
>> > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
>> > >
>> > > > Hi Christian,
>> > > >
>> > > > i don't understand your solution exactly.
>> > > > Whats the difference?
>> > > > It would still store the #{cc.attrs.xxx} expression and #{cc} cant
>> be
>> > > > evaluated without #pushComponentToEL(cc).
>> > > > Also #createView should be avoided for such a request IMO because of
>> > > > performance.
>> > > >
>> > > > Regards,
>> > > > Thomas
>> > > >
>> > > >
>> > > >
>> > > >
>> > > > 2013/5/13 Christian Beikov <ch...@gmail.com>
>> > > >
>> > > > > I'd rather say this should be fixed by restoring the view before
>> > > > accessing
>> > > > > the expression. I have done something like that for
>> > > > > DynamicContentResourceHandler which probably is used in this case
>> > here
>> > > > too.
>> > > > > Basically you need to save the viewId and the expression together
>> in
>> > > the
>> > > > > session so you are able to restore the adequate expression in the
>> > > > resource
>> > > > > handler. I did the following for GraphicImageRenderer:
>> > > > >
>> > > > >
>> > > > >     @Override
>> > > > >     protected String getImageSrc(FacesContext context,
>> GraphicImage
>> > > > image)
>> > > > > {
>> > > > >         String src = null;
>> > > > >         String name = image.getName();
>> > > > >
>> > > > >         if(name != null) {
>> > > > >             String libName = image.getLibrary();
>> > > > >             ResourceHandler handler =
>> > > > > context.getApplication().getResourceHandler();
>> > > > >             Resource res = handler.createResource(name, libName);
>> > > > >
>> > > > >             if(res == null) {
>> > > > >                 return "RES_NOT_FOUND";
>> > > > >             } else {
>> > > > >                 return
>> > > > >
>> context.getExternalContext().encodeResourceURL(res.getRequestPath());
>> > > > >             }
>> > > > >         } else {
>> > > > >             Object value = image.getValue();
>> > > > >
>> > > > >             if (value == null) {
>> > > > >                 return "";
>> > > > >             } else  if(value instanceof String) {
>> > > > >                 src = getResourceURL(context, (String) value);
>> > > > >             } else if (value instanceof StreamedContent) {
>> > > > >                 ViewHandler viewHandler =
>> > > > > context.getApplication().getViewHandler();
>> > > > >                 StreamedContent streamedContent =
>> (StreamedContent)
>> > > > value;
>> > > > >                 Resource resource =
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> context.getApplication().getResourceHandler().createResource("dynamiccontent",
>> > > > > "primefaces", streamedContent.getContentType());
>> > > > >                 String resourcePath = resource.getRequestPath();
>> > > > >
>> > > > >                 // servlet path/prefix is added already in
>> > > > > ViewHandler.getActionURL so remove it here
>> > > > >                 resourcePath =
>> > > > >
>> > resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
>> > > > >                 resourcePath = viewHandler.getActionURL(context,
>> > > > > resourcePath);
>> > > > >
>> > > > >                 String rid = createUniqueContentId(context);
>> > > > >                 StringBuilder builder = new
>> > > StringBuilder(resourcePath);
>> > > > >
>> > > > >                 if(resourcePath.contains("?"))
>> > > > >                     builder.append("&");
>> > > > >                 else
>> > > > >                     builder.append("?");
>> > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
>> > > > >                 builder.append("&").append("ln=primefaces");
>> > > > >
>> > > > >                 for (UIComponent kid : image.getChildren()) {
>> > > > >                     if (kid instanceof UIParameter) {
>> > > > >                         UIParameter param = (UIParameter) kid;
>> > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> builder.append("&").append(param.getName()).append("=").append(param.getValue());
>> > > > >                     }
>> > > > >                 }
>> > > > >
>> > > > >                 src = builder.toString();
>> > > > >                 Map<String, String> dynamicContentMap = new
>> > > > HashMap<String,
>> > > > > String>();
>> > > > >
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
>> > > > > image.getValueExpression("value").getExpressionString());
>> > > > >
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
>> > > > > context.getViewRoot().getViewId());
>> > > > >
>> > > > >
>> context.getExternalContext().getSessionMap().put(rid,
>> > > > > dynamicContentMap);
>> > > > >             }
>> > > > >
>> > > > >             // Add caching if needed
>> > > > >             if (!image.isCache()) {
>> > > > >                 src += src.contains("?") ? "&" : "?";
>> > > > >                 src = src + "primefaces_image=" +
>> > > > > UUID.randomUUID().toString();
>> > > > >             }
>> > > > >
>> > > > >         }
>> > > > >
>> > > > >         return src;
>> > > > >     }
>> > > > >
>> > > > >
>> > > > > And then I have the DynamicContentResourceHandler:
>> > > > >
>> > > > > public class DynamicContentResourceHandler extends
>> > > PrimeResourceHandler{
>> > > > >
>> > > > >     private final static Logger logger =
>> > > > > Logger.getLogger(DynamicContentResourceHandler.class.getName());
>> > > > >
>> > > > >     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY =
>> > "viewId";
>> > > > >     public static final String
>> DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
>> > > > > "valueExpression";
>> > > > >     public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";
>> > > > >
>> > > > >     public DynamicContentResourceHandler(ResourceHandler wrapped)
>> {
>> > > > >         super(wrapped);
>> > > > >     }
>> > > > >
>> > > > >     @Override
>> > > > >     public void handleResourceRequest(FacesContext context) throws
>> > > > > IOException {
>> > > > >         Map<String,String> params =
>> > > > > context.getExternalContext().getRequestParameterMap();
>> > > > >         String library = params.get("ln");
>> > > > >         String dynamicContentId =
>> params.get(DYNAMIC_CONTENT_PARAM);
>> > > > >
>> > > > >         if(dynamicContentId != null && library != null &&
>> > > > > library.equals("primefaces")) {
>> > > > >             Map<String,Object> session =
>> > > > > context.getExternalContext().getSessionMap();
>> > > > >             StreamedContent content = null;
>> > > > >
>> > > > >             try {
>> > > > >                 @SuppressWarnings("unchecked")
>> > > > >                 Map<String, String> dynamicContentMap =
>> (Map<String,
>> > > > > String>) session.get(dynamicContentId);
>> > > > >
>> > > > >                 if(dynamicContentMap != null){
>> > > > >                     String viewId =
>> > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
>> > > > >                     String dynamicContentEL =
>> > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
>> > > > >
>> > > > >                     // Workaround for view based scopes
>> > > > >
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
>> > > > > viewId));
>> > > > >
>> > > > >                     ELContext eLContext = context.getELContext();
>> > > > >                     ValueExpression ve =
>> > > > >
>> > > > >
>> > > >
>> > >
>> >
>> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
>> > > > > dynamicContentEL, StreamedContent.class);
>> > > > >                     content = (StreamedContent)
>> > ve.getValue(eLContext);
>> > > > >
>> > > > >                     ExternalContext externalContext =
>> > > > > context.getExternalContext();
>> > > > >
>> > > > > externalContext.setResponseStatus(HttpServletResponse.SC_OK);
>> > > > >
>> > > > > externalContext.setResponseContentType(content.getContentType());
>> > > > >
>> > > > >                     byte[] buffer = new byte[2048];
>> > > > >
>> > > > >                     int length;
>> > > > >                     InputStream inputStream = content.getStream();
>> > > > >
>> > > > >                     while ((length = (inputStream.read(buffer)))
>> >=
>> > 0)
>> > > {
>> > > > >
>> > > > > externalContext.getResponseOutputStream().write(buffer, 0,
>> length);
>> > > > >                     }
>> > > > >
>> > > > >
>> > externalContext.getResponseOutputStream().flush();
>> > > > >                     context.responseComplete();
>> > > > >                 } else {
>> > > > >                     ExternalContext externalContext =
>> > > > > context.getExternalContext();
>> > > > >
>> > > > >
>> externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
>> > > > >
>> > externalContext.getResponseOutputStream().flush();
>> > > > >                     context.responseComplete();
>> > > > >                 }
>> > > > >             } catch(Exception e) {
>> > > > >                 logger.log(Level.SEVERE, "Error in streaming
>> dynamic
>> > > > > resource.", e);
>> > > > >             } finally {
>> > > > >                 session.remove(dynamicContentId);
>> > > > >
>> > > > >                 if(content != null) {
>> > > > >                     content.getStream().close();
>> > > > >                 }
>> > > > >             }
>> > > > >         }
>> > > > >         else {
>> > > > >            super.handleResourceRequest(context);
>> > > > >         }
>> > > > >     }
>> > > > >
>> > > > > }
>> > > > >
>> > > > > This at least works for me, hope it can help you too.
>> > > > >
>> > > > >
>> > > > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
>> > > > >
>> > > > > > Hi Kito,
>> > > > > >
>> > > > > > CC:
>> > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>> ----------------------------------------------------------------------------------------------------------------
>> > > > > >     <composite:interface>
>> > > > > >         <composite:attribute name="pdfStream"
>> > > > > > type="org.primefaces.model.StreamedContent" required="true" />
>> > > > > >     </composite:interface>
>> > > > > >
>> > > > > >     <composite:implementation>
>> > > > > >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
>> > > > > height="600px"
>> > > > > > player="pdf"/>
>> > > > > >     </composite:implementation>
>> > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>> ----------------------------------------------------------------------------------------------------------------
>> > > > > >
>> > > > > > View:
>> > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>> ----------------------------------------------------------------------------------------------------------------
>> > > > > >     <cc:myCC pdfStream="#{reportController.report} />
>> > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>> ----------------------------------------------------------------------------------------------------------------
>> > > > > >
>> > > > > > PF receives the Expression String via:
>> > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>> ----------------------------------------------------------------------------------------------------------------
>> > > > > > media.getValueExpression("value").getExpressionString();
>> > > > > >
>> > > > > >
>> > > > >
>> > > >
>> > >
>> >
>> ----------------------------------------------------------------------------------------------------------------
>> > > > > >
>> > > > > > If it should work inside a CC, we must receive
>> > > "#{cc.attrs.pdfStream}"
>> > > > > > instead of "#{cc.attrs.pdfStream}".
>> > > > > >
>> > > > > > How can get the real expression here?
>> > > > > >
>> > > > > > Thanks,
>> > > > > > Thomas
>> > > > > >
>> > > > > >
>> > > > > > 2013/5/13 Kito Mann <ki...@virtua.com>
>> > > > > >
>> > > > > > > Hello Thomas,
>> > > > > > >
>> > > > > > > I think this is doable. Can you send us your composite
>> component
>> > > > code?
>> > > > > > >
>> > > > > > > ___
>> > > > > > >
>> > > > > > > Kito D. Mann | @kito99 | Author, JSF in Action
>> > > > > > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training
>> and
>> > > > > > consulting
>> > > > > > > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and
>> > info |
>> > > > > > > @jsfcentral
>> > > > > > > +1 203-998-0403
>> > > > > > >
>> > > > > > > * JSF2 in Action Course - 6/17 - London:
>> > > > > > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
>> > > > > > > * Listen to the Enterprise Java Newscast: *
>> > > > > > > http://blogs.jsfcentral.com/JSFNewscast/
>> > > > > > > *
>> > > > > > > * JSFCentral Interviews Podcast:
>> > > > > > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
>> > > > > > > * Sign up for the JSFCentral Newsletter:
>> > > > > > > http://oi.vresp.com/?fid=ac048d0e17
>> > > > > > >
>> > > > > > >
>> > > > > > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
>> > > > > > > andraschko.thomas@gmail.com> wrote:
>> > > > > > >
>> > > > > > > > Hi,
>> > > > > > > >
>> > > > > > > > is it possible unwrap a CC ValueExpresion?
>> > > > > > > > i found a bug with PrimeFaces p:media inside a composite
>> > > component
>> > > > > and
>> > > > > > i
>> > > > > > > > would like to fix it.
>> > > > > > > >
>> > > > > > > > If you pass the EL via a CC attr (e.g.
>> #{myController.content})
>> > > and
>> > > > > > > attach
>> > > > > > > > it to p:media (e.g. #{cc.attrs.content}),
>> > > > > > > > p:media gets the ValueExpression and saves them in the
>> session,
>> > > to
>> > > > > > later
>> > > > > > > > stream the content in a resource request.
>> > > > > > > > Later the ResourceHandler evaluates it and tries to get the
>> > value
>> > > > of
>> > > > > > > > #{cc.attrs.content}, which can't work ofc.
>> > > > > > > >
>> > > > > > > > So is it possible to extract the "real" EL before store it
>> in
>> > the
>> > > > > > > session?
>> > > > > > > > Is there a solution which also works in mojarra?
>> > > > > > > >
>> > > > > > > >
>> > > > > > > > Regards,
>> > > > > > > > Thomas
>> > > > > > > >
>> > > > > > >
>> > > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > > > --
>> > > > > <br/>
>> > > > > <br/>
>> > > > > Mit freundlichen Grüßen,<br/>
>> > > > > <hr/>
>> > > > > <b>Christian Beikov</b><br/>
>> > > > > Blazebit Design & Developing<br/>
>> > > > > <a href="http://www.blazebit.com">http://www.blazebit.com
>> </a><br/>
>> > > > >
>> > > >
>> > >
>> > >
>> > >
>> > > --
>> > > <br/>
>> > > <br/>
>> > > Mit freundlichen Grüßen,<br/>
>> > > <hr/>
>> > > <b>Christian Beikov</b><br/>
>> > > Blazebit Design & Developing<br/>
>> > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
>> > >
>> >
>>
>>
>>
>> --
>> <br/>
>> <br/>
>> Mit freundlichen Grüßen,<br/>
>> <hr/>
>> <b>Christian Beikov</b><br/>
>> Blazebit Design & Developing<br/>
>> <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
>>
>
>

Re: Unwrap CC ValueExpression?

Posted by Thomas Andraschko <an...@gmail.com>.
I'm sure, i checked the code base :)

We generate a report on the fly for the user. It just depends on the
session data but not on view data, therefore streamedContent is actually a
nice solution.


2013/5/13 Christian Beikov <ch...@gmail.com>

> I am not sure if that is independent. I think catagy fixed something like
> this in a newer release.
>
> Well I fixed the graphicImage thing by using the previously provided
> implementation. It's costly because it has to restore the view but in the
> end it works for us. We are using the graphicImage in composite components
> too as far as I remember.
> To overcome the filedownload problem I wrote my own
> UIComponent/UINamingContainer for the composite component which wraps a
> command link that uses the action listener provided by the composite
> component implementation instead of using the fileDownload of PF.
> I didn't use the media component before, but if the content is really
> stateless why don't you provide it via something like:
> #{resource['library:file']} ?
>
>
> 2013/5/13 Thomas Andraschko <an...@gmail.com>
>
> > 3.5.4 but thats indepenent :)
> >
> >
> >
> > 2013/5/13 Christian Beikov <ch...@gmail.com>
> >
> > > What PF version are you using?
> > >
> > >
> > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > >
> > > > It's really view independent and  my Controller is RequestScoped.
> > > > The only problem is that currently graphicImage/media/filedownload
> are
> > > > unusable in a CC, if you need to pass the EL into the CC.
> > > >
> > > >
> > > > 2013/5/13 Christian Beikov <ch...@gmail.com>
> > > >
> > > > > The difference is that it can handle the view based scopes where
> the
> > > > > primefaces impl can't. But as I just realize this won't help you at
> > > all.
> > > > > Sorry but for now I can't think of a reliable general purpose way
> to
> > > > > retrieve the contents without rebuilding the view, I have to think
> > > about
> > > > > it.
> > > > > Do you need any context information like iteration status or so to
> > > > evaluate
> > > > > the expression to a meaningful value or is it completely
> independent
> > of
> > > > the
> > > > > view?
> > > > > What scope has the myController?
> > > > >
> > > > >
> > > > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > > > >
> > > > > > Hi Christian,
> > > > > >
> > > > > > i don't understand your solution exactly.
> > > > > > Whats the difference?
> > > > > > It would still store the #{cc.attrs.xxx} expression and #{cc}
> cant
> > be
> > > > > > evaluated without #pushComponentToEL(cc).
> > > > > > Also #createView should be avoided for such a request IMO because
> > of
> > > > > > performance.
> > > > > >
> > > > > > Regards,
> > > > > > Thomas
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > 2013/5/13 Christian Beikov <ch...@gmail.com>
> > > > > >
> > > > > > > I'd rather say this should be fixed by restoring the view
> before
> > > > > > accessing
> > > > > > > the expression. I have done something like that for
> > > > > > > DynamicContentResourceHandler which probably is used in this
> case
> > > > here
> > > > > > too.
> > > > > > > Basically you need to save the viewId and the expression
> together
> > > in
> > > > > the
> > > > > > > session so you are able to restore the adequate expression in
> the
> > > > > > resource
> > > > > > > handler. I did the following for GraphicImageRenderer:
> > > > > > >
> > > > > > >
> > > > > > >     @Override
> > > > > > >     protected String getImageSrc(FacesContext context,
> > GraphicImage
> > > > > > image)
> > > > > > > {
> > > > > > >         String src = null;
> > > > > > >         String name = image.getName();
> > > > > > >
> > > > > > >         if(name != null) {
> > > > > > >             String libName = image.getLibrary();
> > > > > > >             ResourceHandler handler =
> > > > > > > context.getApplication().getResourceHandler();
> > > > > > >             Resource res = handler.createResource(name,
> libName);
> > > > > > >
> > > > > > >             if(res == null) {
> > > > > > >                 return "RES_NOT_FOUND";
> > > > > > >             } else {
> > > > > > >                 return
> > > > > > >
> > > context.getExternalContext().encodeResourceURL(res.getRequestPath());
> > > > > > >             }
> > > > > > >         } else {
> > > > > > >             Object value = image.getValue();
> > > > > > >
> > > > > > >             if (value == null) {
> > > > > > >                 return "";
> > > > > > >             } else  if(value instanceof String) {
> > > > > > >                 src = getResourceURL(context, (String) value);
> > > > > > >             } else if (value instanceof StreamedContent) {
> > > > > > >                 ViewHandler viewHandler =
> > > > > > > context.getApplication().getViewHandler();
> > > > > > >                 StreamedContent streamedContent =
> > (StreamedContent)
> > > > > > value;
> > > > > > >                 Resource resource =
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> context.getApplication().getResourceHandler().createResource("dynamiccontent",
> > > > > > > "primefaces", streamedContent.getContentType());
> > > > > > >                 String resourcePath =
> resource.getRequestPath();
> > > > > > >
> > > > > > >                 // servlet path/prefix is added already in
> > > > > > > ViewHandler.getActionURL so remove it here
> > > > > > >                 resourcePath =
> > > > > > >
> > > >
> resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
> > > > > > >                 resourcePath =
> viewHandler.getActionURL(context,
> > > > > > > resourcePath);
> > > > > > >
> > > > > > >                 String rid = createUniqueContentId(context);
> > > > > > >                 StringBuilder builder = new
> > > > > StringBuilder(resourcePath);
> > > > > > >
> > > > > > >                 if(resourcePath.contains("?"))
> > > > > > >                     builder.append("&");
> > > > > > >                 else
> > > > > > >                     builder.append("?");
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
> > > > > > >                 builder.append("&").append("ln=primefaces");
> > > > > > >
> > > > > > >                 for (UIComponent kid : image.getChildren()) {
> > > > > > >                     if (kid instanceof UIParameter) {
> > > > > > >                         UIParameter param = (UIParameter) kid;
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> builder.append("&").append(param.getName()).append("=").append(param.getValue());
> > > > > > >                     }
> > > > > > >                 }
> > > > > > >
> > > > > > >                 src = builder.toString();
> > > > > > >                 Map<String, String> dynamicContentMap = new
> > > > > > HashMap<String,
> > > > > > > String>();
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
> > > > > > > image.getValueExpression("value").getExpressionString());
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
> > > > > > > context.getViewRoot().getViewId());
> > > > > > >
> > > > > > >
> > > context.getExternalContext().getSessionMap().put(rid,
> > > > > > > dynamicContentMap);
> > > > > > >             }
> > > > > > >
> > > > > > >             // Add caching if needed
> > > > > > >             if (!image.isCache()) {
> > > > > > >                 src += src.contains("?") ? "&" : "?";
> > > > > > >                 src = src + "primefaces_image=" +
> > > > > > > UUID.randomUUID().toString();
> > > > > > >             }
> > > > > > >
> > > > > > >         }
> > > > > > >
> > > > > > >         return src;
> > > > > > >     }
> > > > > > >
> > > > > > >
> > > > > > > And then I have the DynamicContentResourceHandler:
> > > > > > >
> > > > > > > public class DynamicContentResourceHandler extends
> > > > > PrimeResourceHandler{
> > > > > > >
> > > > > > >     private final static Logger logger =
> > > > > > >
> Logger.getLogger(DynamicContentResourceHandler.class.getName());
> > > > > > >
> > > > > > >     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY =
> > > > "viewId";
> > > > > > >     public static final String
> > > DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
> > > > > > > "valueExpression";
> > > > > > >     public static final String DYNAMIC_CONTENT_PARAM =
> "pfdrid";
> > > > > > >
> > > > > > >     public DynamicContentResourceHandler(ResourceHandler
> > wrapped) {
> > > > > > >         super(wrapped);
> > > > > > >     }
> > > > > > >
> > > > > > >     @Override
> > > > > > >     public void handleResourceRequest(FacesContext context)
> > throws
> > > > > > > IOException {
> > > > > > >         Map<String,String> params =
> > > > > > > context.getExternalContext().getRequestParameterMap();
> > > > > > >         String library = params.get("ln");
> > > > > > >         String dynamicContentId =
> > > params.get(DYNAMIC_CONTENT_PARAM);
> > > > > > >
> > > > > > >         if(dynamicContentId != null && library != null &&
> > > > > > > library.equals("primefaces")) {
> > > > > > >             Map<String,Object> session =
> > > > > > > context.getExternalContext().getSessionMap();
> > > > > > >             StreamedContent content = null;
> > > > > > >
> > > > > > >             try {
> > > > > > >                 @SuppressWarnings("unchecked")
> > > > > > >                 Map<String, String> dynamicContentMap =
> > > (Map<String,
> > > > > > > String>) session.get(dynamicContentId);
> > > > > > >
> > > > > > >                 if(dynamicContentMap != null){
> > > > > > >                     String viewId =
> > > > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
> > > > > > >                     String dynamicContentEL =
> > > > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
> > > > > > >
> > > > > > >                     // Workaround for view based scopes
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
> > > > > > > viewId));
> > > > > > >
> > > > > > >                     ELContext eLContext =
> context.getELContext();
> > > > > > >                     ValueExpression ve =
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
> > > > > > > dynamicContentEL, StreamedContent.class);
> > > > > > >                     content = (StreamedContent)
> > > > ve.getValue(eLContext);
> > > > > > >
> > > > > > >                     ExternalContext externalContext =
> > > > > > > context.getExternalContext();
> > > > > > >
> > > > > > > externalContext.setResponseStatus(HttpServletResponse.SC_OK);
> > > > > > >
> > > > > > >
> externalContext.setResponseContentType(content.getContentType());
> > > > > > >
> > > > > > >                     byte[] buffer = new byte[2048];
> > > > > > >
> > > > > > >                     int length;
> > > > > > >                     InputStream inputStream =
> > content.getStream();
> > > > > > >
> > > > > > >                     while ((length =
> (inputStream.read(buffer)))
> > >=
> > > > 0)
> > > > > {
> > > > > > >
> > > > > > > externalContext.getResponseOutputStream().write(buffer, 0,
> > length);
> > > > > > >                     }
> > > > > > >
> > > > > > >
> > > > externalContext.getResponseOutputStream().flush();
> > > > > > >                     context.responseComplete();
> > > > > > >                 } else {
> > > > > > >                     ExternalContext externalContext =
> > > > > > > context.getExternalContext();
> > > > > > >
> > > > > > >
> > > externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
> > > > > > >
> > > > externalContext.getResponseOutputStream().flush();
> > > > > > >                     context.responseComplete();
> > > > > > >                 }
> > > > > > >             } catch(Exception e) {
> > > > > > >                 logger.log(Level.SEVERE, "Error in streaming
> > > dynamic
> > > > > > > resource.", e);
> > > > > > >             } finally {
> > > > > > >                 session.remove(dynamicContentId);
> > > > > > >
> > > > > > >                 if(content != null) {
> > > > > > >                     content.getStream().close();
> > > > > > >                 }
> > > > > > >             }
> > > > > > >         }
> > > > > > >         else {
> > > > > > >            super.handleResourceRequest(context);
> > > > > > >         }
> > > > > > >     }
> > > > > > >
> > > > > > > }
> > > > > > >
> > > > > > > This at least works for me, hope it can help you too.
> > > > > > >
> > > > > > >
> > > > > > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > > > > > >
> > > > > > > > Hi Kito,
> > > > > > > >
> > > > > > > > CC:
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > > >     <composite:interface>
> > > > > > > >         <composite:attribute name="pdfStream"
> > > > > > > > type="org.primefaces.model.StreamedContent" required="true"
> />
> > > > > > > >     </composite:interface>
> > > > > > > >
> > > > > > > >     <composite:implementation>
> > > > > > > >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
> > > > > > > height="600px"
> > > > > > > > player="pdf"/>
> > > > > > > >     </composite:implementation>
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > > >
> > > > > > > > View:
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > > >     <cc:myCC pdfStream="#{reportController.report} />
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > > >
> > > > > > > > PF receives the Expression String via:
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > > > media.getValueExpression("value").getExpressionString();
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > > >
> > > > > > > > If it should work inside a CC, we must receive
> > > > > "#{cc.attrs.pdfStream}"
> > > > > > > > instead of "#{cc.attrs.pdfStream}".
> > > > > > > >
> > > > > > > > How can get the real expression here?
> > > > > > > >
> > > > > > > > Thanks,
> > > > > > > > Thomas
> > > > > > > >
> > > > > > > >
> > > > > > > > 2013/5/13 Kito Mann <ki...@virtua.com>
> > > > > > > >
> > > > > > > > > Hello Thomas,
> > > > > > > > >
> > > > > > > > > I think this is doable. Can you send us your composite
> > > component
> > > > > > code?
> > > > > > > > >
> > > > > > > > > ___
> > > > > > > > >
> > > > > > > > > Kito D. Mann | @kito99 | Author, JSF in Action
> > > > > > > > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE
> training
> > > and
> > > > > > > > consulting
> > > > > > > > > http://www.JSFCentral.com - JavaServer Faces FAQ, news,
> and
> > > > info |
> > > > > > > > > @jsfcentral
> > > > > > > > > +1 203-998-0403
> > > > > > > > >
> > > > > > > > > * JSF2 in Action Course - 6/17 - London:
> > > > > > > > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > > > > > > > > * Listen to the Enterprise Java Newscast: *
> > > > > > > > > http://blogs.jsfcentral.com/JSFNewscast/
> > > > > > > > > *
> > > > > > > > > * JSFCentral Interviews Podcast:
> > > > > > > > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > > > > > > > > * Sign up for the JSFCentral Newsletter:
> > > > > > > > > http://oi.vresp.com/?fid=ac048d0e17
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > > > > > > > > andraschko.thomas@gmail.com> wrote:
> > > > > > > > >
> > > > > > > > > > Hi,
> > > > > > > > > >
> > > > > > > > > > is it possible unwrap a CC ValueExpresion?
> > > > > > > > > > i found a bug with PrimeFaces p:media inside a composite
> > > > > component
> > > > > > > and
> > > > > > > > i
> > > > > > > > > > would like to fix it.
> > > > > > > > > >
> > > > > > > > > > If you pass the EL via a CC attr (e.g.
> > > #{myController.content})
> > > > > and
> > > > > > > > > attach
> > > > > > > > > > it to p:media (e.g. #{cc.attrs.content}),
> > > > > > > > > > p:media gets the ValueExpression and saves them in the
> > > session,
> > > > > to
> > > > > > > > later
> > > > > > > > > > stream the content in a resource request.
> > > > > > > > > > Later the ResourceHandler evaluates it and tries to get
> the
> > > > value
> > > > > > of
> > > > > > > > > > #{cc.attrs.content}, which can't work ofc.
> > > > > > > > > >
> > > > > > > > > > So is it possible to extract the "real" EL before store
> it
> > in
> > > > the
> > > > > > > > > session?
> > > > > > > > > > Is there a solution which also works in mojarra?
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > Regards,
> > > > > > > > > > Thomas
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > <br/>
> > > > > > > <br/>
> > > > > > > Mit freundlichen Grüßen,<br/>
> > > > > > > <hr/>
> > > > > > > <b>Christian Beikov</b><br/>
> > > > > > > Blazebit Design & Developing<br/>
> > > > > > > <a href="http://www.blazebit.com">http://www.blazebit.com
> > </a><br/>
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > <br/>
> > > > > <br/>
> > > > > Mit freundlichen Grüßen,<br/>
> > > > > <hr/>
> > > > > <b>Christian Beikov</b><br/>
> > > > > Blazebit Design & Developing<br/>
> > > > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > <br/>
> > > <br/>
> > > Mit freundlichen Grüßen,<br/>
> > > <hr/>
> > > <b>Christian Beikov</b><br/>
> > > Blazebit Design & Developing<br/>
> > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> > >
> >
>
>
>
> --
> <br/>
> <br/>
> Mit freundlichen Grüßen,<br/>
> <hr/>
> <b>Christian Beikov</b><br/>
> Blazebit Design & Developing<br/>
> <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
>

Re: Unwrap CC ValueExpression?

Posted by Christian Beikov <ch...@gmail.com>.
I am not sure if that is independent. I think catagy fixed something like
this in a newer release.

Well I fixed the graphicImage thing by using the previously provided
implementation. It's costly because it has to restore the view but in the
end it works for us. We are using the graphicImage in composite components
too as far as I remember.
To overcome the filedownload problem I wrote my own
UIComponent/UINamingContainer for the composite component which wraps a
command link that uses the action listener provided by the composite
component implementation instead of using the fileDownload of PF.
I didn't use the media component before, but if the content is really
stateless why don't you provide it via something like:
#{resource['library:file']} ?


2013/5/13 Thomas Andraschko <an...@gmail.com>

> 3.5.4 but thats indepenent :)
>
>
>
> 2013/5/13 Christian Beikov <ch...@gmail.com>
>
> > What PF version are you using?
> >
> >
> > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> >
> > > It's really view independent and  my Controller is RequestScoped.
> > > The only problem is that currently graphicImage/media/filedownload are
> > > unusable in a CC, if you need to pass the EL into the CC.
> > >
> > >
> > > 2013/5/13 Christian Beikov <ch...@gmail.com>
> > >
> > > > The difference is that it can handle the view based scopes where the
> > > > primefaces impl can't. But as I just realize this won't help you at
> > all.
> > > > Sorry but for now I can't think of a reliable general purpose way to
> > > > retrieve the contents without rebuilding the view, I have to think
> > about
> > > > it.
> > > > Do you need any context information like iteration status or so to
> > > evaluate
> > > > the expression to a meaningful value or is it completely independent
> of
> > > the
> > > > view?
> > > > What scope has the myController?
> > > >
> > > >
> > > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > > >
> > > > > Hi Christian,
> > > > >
> > > > > i don't understand your solution exactly.
> > > > > Whats the difference?
> > > > > It would still store the #{cc.attrs.xxx} expression and #{cc} cant
> be
> > > > > evaluated without #pushComponentToEL(cc).
> > > > > Also #createView should be avoided for such a request IMO because
> of
> > > > > performance.
> > > > >
> > > > > Regards,
> > > > > Thomas
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > 2013/5/13 Christian Beikov <ch...@gmail.com>
> > > > >
> > > > > > I'd rather say this should be fixed by restoring the view before
> > > > > accessing
> > > > > > the expression. I have done something like that for
> > > > > > DynamicContentResourceHandler which probably is used in this case
> > > here
> > > > > too.
> > > > > > Basically you need to save the viewId and the expression together
> > in
> > > > the
> > > > > > session so you are able to restore the adequate expression in the
> > > > > resource
> > > > > > handler. I did the following for GraphicImageRenderer:
> > > > > >
> > > > > >
> > > > > >     @Override
> > > > > >     protected String getImageSrc(FacesContext context,
> GraphicImage
> > > > > image)
> > > > > > {
> > > > > >         String src = null;
> > > > > >         String name = image.getName();
> > > > > >
> > > > > >         if(name != null) {
> > > > > >             String libName = image.getLibrary();
> > > > > >             ResourceHandler handler =
> > > > > > context.getApplication().getResourceHandler();
> > > > > >             Resource res = handler.createResource(name, libName);
> > > > > >
> > > > > >             if(res == null) {
> > > > > >                 return "RES_NOT_FOUND";
> > > > > >             } else {
> > > > > >                 return
> > > > > >
> > context.getExternalContext().encodeResourceURL(res.getRequestPath());
> > > > > >             }
> > > > > >         } else {
> > > > > >             Object value = image.getValue();
> > > > > >
> > > > > >             if (value == null) {
> > > > > >                 return "";
> > > > > >             } else  if(value instanceof String) {
> > > > > >                 src = getResourceURL(context, (String) value);
> > > > > >             } else if (value instanceof StreamedContent) {
> > > > > >                 ViewHandler viewHandler =
> > > > > > context.getApplication().getViewHandler();
> > > > > >                 StreamedContent streamedContent =
> (StreamedContent)
> > > > > value;
> > > > > >                 Resource resource =
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> context.getApplication().getResourceHandler().createResource("dynamiccontent",
> > > > > > "primefaces", streamedContent.getContentType());
> > > > > >                 String resourcePath = resource.getRequestPath();
> > > > > >
> > > > > >                 // servlet path/prefix is added already in
> > > > > > ViewHandler.getActionURL so remove it here
> > > > > >                 resourcePath =
> > > > > >
> > > resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
> > > > > >                 resourcePath = viewHandler.getActionURL(context,
> > > > > > resourcePath);
> > > > > >
> > > > > >                 String rid = createUniqueContentId(context);
> > > > > >                 StringBuilder builder = new
> > > > StringBuilder(resourcePath);
> > > > > >
> > > > > >                 if(resourcePath.contains("?"))
> > > > > >                     builder.append("&");
> > > > > >                 else
> > > > > >                     builder.append("?");
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
> > > > > >                 builder.append("&").append("ln=primefaces");
> > > > > >
> > > > > >                 for (UIComponent kid : image.getChildren()) {
> > > > > >                     if (kid instanceof UIParameter) {
> > > > > >                         UIParameter param = (UIParameter) kid;
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> builder.append("&").append(param.getName()).append("=").append(param.getValue());
> > > > > >                     }
> > > > > >                 }
> > > > > >
> > > > > >                 src = builder.toString();
> > > > > >                 Map<String, String> dynamicContentMap = new
> > > > > HashMap<String,
> > > > > > String>();
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
> > > > > > image.getValueExpression("value").getExpressionString());
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
> > > > > > context.getViewRoot().getViewId());
> > > > > >
> > > > > >
> > context.getExternalContext().getSessionMap().put(rid,
> > > > > > dynamicContentMap);
> > > > > >             }
> > > > > >
> > > > > >             // Add caching if needed
> > > > > >             if (!image.isCache()) {
> > > > > >                 src += src.contains("?") ? "&" : "?";
> > > > > >                 src = src + "primefaces_image=" +
> > > > > > UUID.randomUUID().toString();
> > > > > >             }
> > > > > >
> > > > > >         }
> > > > > >
> > > > > >         return src;
> > > > > >     }
> > > > > >
> > > > > >
> > > > > > And then I have the DynamicContentResourceHandler:
> > > > > >
> > > > > > public class DynamicContentResourceHandler extends
> > > > PrimeResourceHandler{
> > > > > >
> > > > > >     private final static Logger logger =
> > > > > > Logger.getLogger(DynamicContentResourceHandler.class.getName());
> > > > > >
> > > > > >     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY =
> > > "viewId";
> > > > > >     public static final String
> > DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
> > > > > > "valueExpression";
> > > > > >     public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";
> > > > > >
> > > > > >     public DynamicContentResourceHandler(ResourceHandler
> wrapped) {
> > > > > >         super(wrapped);
> > > > > >     }
> > > > > >
> > > > > >     @Override
> > > > > >     public void handleResourceRequest(FacesContext context)
> throws
> > > > > > IOException {
> > > > > >         Map<String,String> params =
> > > > > > context.getExternalContext().getRequestParameterMap();
> > > > > >         String library = params.get("ln");
> > > > > >         String dynamicContentId =
> > params.get(DYNAMIC_CONTENT_PARAM);
> > > > > >
> > > > > >         if(dynamicContentId != null && library != null &&
> > > > > > library.equals("primefaces")) {
> > > > > >             Map<String,Object> session =
> > > > > > context.getExternalContext().getSessionMap();
> > > > > >             StreamedContent content = null;
> > > > > >
> > > > > >             try {
> > > > > >                 @SuppressWarnings("unchecked")
> > > > > >                 Map<String, String> dynamicContentMap =
> > (Map<String,
> > > > > > String>) session.get(dynamicContentId);
> > > > > >
> > > > > >                 if(dynamicContentMap != null){
> > > > > >                     String viewId =
> > > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
> > > > > >                     String dynamicContentEL =
> > > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
> > > > > >
> > > > > >                     // Workaround for view based scopes
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
> > > > > > viewId));
> > > > > >
> > > > > >                     ELContext eLContext = context.getELContext();
> > > > > >                     ValueExpression ve =
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
> > > > > > dynamicContentEL, StreamedContent.class);
> > > > > >                     content = (StreamedContent)
> > > ve.getValue(eLContext);
> > > > > >
> > > > > >                     ExternalContext externalContext =
> > > > > > context.getExternalContext();
> > > > > >
> > > > > > externalContext.setResponseStatus(HttpServletResponse.SC_OK);
> > > > > >
> > > > > > externalContext.setResponseContentType(content.getContentType());
> > > > > >
> > > > > >                     byte[] buffer = new byte[2048];
> > > > > >
> > > > > >                     int length;
> > > > > >                     InputStream inputStream =
> content.getStream();
> > > > > >
> > > > > >                     while ((length = (inputStream.read(buffer)))
> >=
> > > 0)
> > > > {
> > > > > >
> > > > > > externalContext.getResponseOutputStream().write(buffer, 0,
> length);
> > > > > >                     }
> > > > > >
> > > > > >
> > > externalContext.getResponseOutputStream().flush();
> > > > > >                     context.responseComplete();
> > > > > >                 } else {
> > > > > >                     ExternalContext externalContext =
> > > > > > context.getExternalContext();
> > > > > >
> > > > > >
> > externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
> > > > > >
> > > externalContext.getResponseOutputStream().flush();
> > > > > >                     context.responseComplete();
> > > > > >                 }
> > > > > >             } catch(Exception e) {
> > > > > >                 logger.log(Level.SEVERE, "Error in streaming
> > dynamic
> > > > > > resource.", e);
> > > > > >             } finally {
> > > > > >                 session.remove(dynamicContentId);
> > > > > >
> > > > > >                 if(content != null) {
> > > > > >                     content.getStream().close();
> > > > > >                 }
> > > > > >             }
> > > > > >         }
> > > > > >         else {
> > > > > >            super.handleResourceRequest(context);
> > > > > >         }
> > > > > >     }
> > > > > >
> > > > > > }
> > > > > >
> > > > > > This at least works for me, hope it can help you too.
> > > > > >
> > > > > >
> > > > > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > > > > >
> > > > > > > Hi Kito,
> > > > > > >
> > > > > > > CC:
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > >     <composite:interface>
> > > > > > >         <composite:attribute name="pdfStream"
> > > > > > > type="org.primefaces.model.StreamedContent" required="true" />
> > > > > > >     </composite:interface>
> > > > > > >
> > > > > > >     <composite:implementation>
> > > > > > >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
> > > > > > height="600px"
> > > > > > > player="pdf"/>
> > > > > > >     </composite:implementation>
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > >
> > > > > > > View:
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > >     <cc:myCC pdfStream="#{reportController.report} />
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > >
> > > > > > > PF receives the Expression String via:
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > > media.getValueExpression("value").getExpressionString();
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > >
> > > > > > > If it should work inside a CC, we must receive
> > > > "#{cc.attrs.pdfStream}"
> > > > > > > instead of "#{cc.attrs.pdfStream}".
> > > > > > >
> > > > > > > How can get the real expression here?
> > > > > > >
> > > > > > > Thanks,
> > > > > > > Thomas
> > > > > > >
> > > > > > >
> > > > > > > 2013/5/13 Kito Mann <ki...@virtua.com>
> > > > > > >
> > > > > > > > Hello Thomas,
> > > > > > > >
> > > > > > > > I think this is doable. Can you send us your composite
> > component
> > > > > code?
> > > > > > > >
> > > > > > > > ___
> > > > > > > >
> > > > > > > > Kito D. Mann | @kito99 | Author, JSF in Action
> > > > > > > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training
> > and
> > > > > > > consulting
> > > > > > > > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and
> > > info |
> > > > > > > > @jsfcentral
> > > > > > > > +1 203-998-0403
> > > > > > > >
> > > > > > > > * JSF2 in Action Course - 6/17 - London:
> > > > > > > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > > > > > > > * Listen to the Enterprise Java Newscast: *
> > > > > > > > http://blogs.jsfcentral.com/JSFNewscast/
> > > > > > > > *
> > > > > > > > * JSFCentral Interviews Podcast:
> > > > > > > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > > > > > > > * Sign up for the JSFCentral Newsletter:
> > > > > > > > http://oi.vresp.com/?fid=ac048d0e17
> > > > > > > >
> > > > > > > >
> > > > > > > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > > > > > > > andraschko.thomas@gmail.com> wrote:
> > > > > > > >
> > > > > > > > > Hi,
> > > > > > > > >
> > > > > > > > > is it possible unwrap a CC ValueExpresion?
> > > > > > > > > i found a bug with PrimeFaces p:media inside a composite
> > > > component
> > > > > > and
> > > > > > > i
> > > > > > > > > would like to fix it.
> > > > > > > > >
> > > > > > > > > If you pass the EL via a CC attr (e.g.
> > #{myController.content})
> > > > and
> > > > > > > > attach
> > > > > > > > > it to p:media (e.g. #{cc.attrs.content}),
> > > > > > > > > p:media gets the ValueExpression and saves them in the
> > session,
> > > > to
> > > > > > > later
> > > > > > > > > stream the content in a resource request.
> > > > > > > > > Later the ResourceHandler evaluates it and tries to get the
> > > value
> > > > > of
> > > > > > > > > #{cc.attrs.content}, which can't work ofc.
> > > > > > > > >
> > > > > > > > > So is it possible to extract the "real" EL before store it
> in
> > > the
> > > > > > > > session?
> > > > > > > > > Is there a solution which also works in mojarra?
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > Regards,
> > > > > > > > > Thomas
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > <br/>
> > > > > > <br/>
> > > > > > Mit freundlichen Grüßen,<br/>
> > > > > > <hr/>
> > > > > > <b>Christian Beikov</b><br/>
> > > > > > Blazebit Design & Developing<br/>
> > > > > > <a href="http://www.blazebit.com">http://www.blazebit.com
> </a><br/>
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > <br/>
> > > > <br/>
> > > > Mit freundlichen Grüßen,<br/>
> > > > <hr/>
> > > > <b>Christian Beikov</b><br/>
> > > > Blazebit Design & Developing<br/>
> > > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> > > >
> > >
> >
> >
> >
> > --
> > <br/>
> > <br/>
> > Mit freundlichen Grüßen,<br/>
> > <hr/>
> > <b>Christian Beikov</b><br/>
> > Blazebit Design & Developing<br/>
> > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> >
>



-- 
<br/>
<br/>
Mit freundlichen Grüßen,<br/>
<hr/>
<b>Christian Beikov</b><br/>
Blazebit Design & Developing<br/>
<a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>

Re: Unwrap CC ValueExpression?

Posted by Thomas Andraschko <an...@gmail.com>.
3.5.4 but thats indepenent :)



2013/5/13 Christian Beikov <ch...@gmail.com>

> What PF version are you using?
>
>
> 2013/5/13 Thomas Andraschko <an...@gmail.com>
>
> > It's really view independent and  my Controller is RequestScoped.
> > The only problem is that currently graphicImage/media/filedownload are
> > unusable in a CC, if you need to pass the EL into the CC.
> >
> >
> > 2013/5/13 Christian Beikov <ch...@gmail.com>
> >
> > > The difference is that it can handle the view based scopes where the
> > > primefaces impl can't. But as I just realize this won't help you at
> all.
> > > Sorry but for now I can't think of a reliable general purpose way to
> > > retrieve the contents without rebuilding the view, I have to think
> about
> > > it.
> > > Do you need any context information like iteration status or so to
> > evaluate
> > > the expression to a meaningful value or is it completely independent of
> > the
> > > view?
> > > What scope has the myController?
> > >
> > >
> > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > >
> > > > Hi Christian,
> > > >
> > > > i don't understand your solution exactly.
> > > > Whats the difference?
> > > > It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
> > > > evaluated without #pushComponentToEL(cc).
> > > > Also #createView should be avoided for such a request IMO because of
> > > > performance.
> > > >
> > > > Regards,
> > > > Thomas
> > > >
> > > >
> > > >
> > > >
> > > > 2013/5/13 Christian Beikov <ch...@gmail.com>
> > > >
> > > > > I'd rather say this should be fixed by restoring the view before
> > > > accessing
> > > > > the expression. I have done something like that for
> > > > > DynamicContentResourceHandler which probably is used in this case
> > here
> > > > too.
> > > > > Basically you need to save the viewId and the expression together
> in
> > > the
> > > > > session so you are able to restore the adequate expression in the
> > > > resource
> > > > > handler. I did the following for GraphicImageRenderer:
> > > > >
> > > > >
> > > > >     @Override
> > > > >     protected String getImageSrc(FacesContext context, GraphicImage
> > > > image)
> > > > > {
> > > > >         String src = null;
> > > > >         String name = image.getName();
> > > > >
> > > > >         if(name != null) {
> > > > >             String libName = image.getLibrary();
> > > > >             ResourceHandler handler =
> > > > > context.getApplication().getResourceHandler();
> > > > >             Resource res = handler.createResource(name, libName);
> > > > >
> > > > >             if(res == null) {
> > > > >                 return "RES_NOT_FOUND";
> > > > >             } else {
> > > > >                 return
> > > > >
> context.getExternalContext().encodeResourceURL(res.getRequestPath());
> > > > >             }
> > > > >         } else {
> > > > >             Object value = image.getValue();
> > > > >
> > > > >             if (value == null) {
> > > > >                 return "";
> > > > >             } else  if(value instanceof String) {
> > > > >                 src = getResourceURL(context, (String) value);
> > > > >             } else if (value instanceof StreamedContent) {
> > > > >                 ViewHandler viewHandler =
> > > > > context.getApplication().getViewHandler();
> > > > >                 StreamedContent streamedContent = (StreamedContent)
> > > > value;
> > > > >                 Resource resource =
> > > > >
> > > > >
> > > >
> > >
> >
> context.getApplication().getResourceHandler().createResource("dynamiccontent",
> > > > > "primefaces", streamedContent.getContentType());
> > > > >                 String resourcePath = resource.getRequestPath();
> > > > >
> > > > >                 // servlet path/prefix is added already in
> > > > > ViewHandler.getActionURL so remove it here
> > > > >                 resourcePath =
> > > > >
> > resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
> > > > >                 resourcePath = viewHandler.getActionURL(context,
> > > > > resourcePath);
> > > > >
> > > > >                 String rid = createUniqueContentId(context);
> > > > >                 StringBuilder builder = new
> > > StringBuilder(resourcePath);
> > > > >
> > > > >                 if(resourcePath.contains("?"))
> > > > >                     builder.append("&");
> > > > >                 else
> > > > >                     builder.append("?");
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
> > > > >                 builder.append("&").append("ln=primefaces");
> > > > >
> > > > >                 for (UIComponent kid : image.getChildren()) {
> > > > >                     if (kid instanceof UIParameter) {
> > > > >                         UIParameter param = (UIParameter) kid;
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
> builder.append("&").append(param.getName()).append("=").append(param.getValue());
> > > > >                     }
> > > > >                 }
> > > > >
> > > > >                 src = builder.toString();
> > > > >                 Map<String, String> dynamicContentMap = new
> > > > HashMap<String,
> > > > > String>();
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
> > > > > image.getValueExpression("value").getExpressionString());
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
> > > > > context.getViewRoot().getViewId());
> > > > >
> > > > >
> context.getExternalContext().getSessionMap().put(rid,
> > > > > dynamicContentMap);
> > > > >             }
> > > > >
> > > > >             // Add caching if needed
> > > > >             if (!image.isCache()) {
> > > > >                 src += src.contains("?") ? "&" : "?";
> > > > >                 src = src + "primefaces_image=" +
> > > > > UUID.randomUUID().toString();
> > > > >             }
> > > > >
> > > > >         }
> > > > >
> > > > >         return src;
> > > > >     }
> > > > >
> > > > >
> > > > > And then I have the DynamicContentResourceHandler:
> > > > >
> > > > > public class DynamicContentResourceHandler extends
> > > PrimeResourceHandler{
> > > > >
> > > > >     private final static Logger logger =
> > > > > Logger.getLogger(DynamicContentResourceHandler.class.getName());
> > > > >
> > > > >     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY =
> > "viewId";
> > > > >     public static final String
> DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
> > > > > "valueExpression";
> > > > >     public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";
> > > > >
> > > > >     public DynamicContentResourceHandler(ResourceHandler wrapped) {
> > > > >         super(wrapped);
> > > > >     }
> > > > >
> > > > >     @Override
> > > > >     public void handleResourceRequest(FacesContext context) throws
> > > > > IOException {
> > > > >         Map<String,String> params =
> > > > > context.getExternalContext().getRequestParameterMap();
> > > > >         String library = params.get("ln");
> > > > >         String dynamicContentId =
> params.get(DYNAMIC_CONTENT_PARAM);
> > > > >
> > > > >         if(dynamicContentId != null && library != null &&
> > > > > library.equals("primefaces")) {
> > > > >             Map<String,Object> session =
> > > > > context.getExternalContext().getSessionMap();
> > > > >             StreamedContent content = null;
> > > > >
> > > > >             try {
> > > > >                 @SuppressWarnings("unchecked")
> > > > >                 Map<String, String> dynamicContentMap =
> (Map<String,
> > > > > String>) session.get(dynamicContentId);
> > > > >
> > > > >                 if(dynamicContentMap != null){
> > > > >                     String viewId =
> > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
> > > > >                     String dynamicContentEL =
> > > > > dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
> > > > >
> > > > >                     // Workaround for view based scopes
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
> > > > > viewId));
> > > > >
> > > > >                     ELContext eLContext = context.getELContext();
> > > > >                     ValueExpression ve =
> > > > >
> > > > >
> > > >
> > >
> >
> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
> > > > > dynamicContentEL, StreamedContent.class);
> > > > >                     content = (StreamedContent)
> > ve.getValue(eLContext);
> > > > >
> > > > >                     ExternalContext externalContext =
> > > > > context.getExternalContext();
> > > > >
> > > > > externalContext.setResponseStatus(HttpServletResponse.SC_OK);
> > > > >
> > > > > externalContext.setResponseContentType(content.getContentType());
> > > > >
> > > > >                     byte[] buffer = new byte[2048];
> > > > >
> > > > >                     int length;
> > > > >                     InputStream inputStream = content.getStream();
> > > > >
> > > > >                     while ((length = (inputStream.read(buffer))) >=
> > 0)
> > > {
> > > > >
> > > > > externalContext.getResponseOutputStream().write(buffer, 0, length);
> > > > >                     }
> > > > >
> > > > >
> > externalContext.getResponseOutputStream().flush();
> > > > >                     context.responseComplete();
> > > > >                 } else {
> > > > >                     ExternalContext externalContext =
> > > > > context.getExternalContext();
> > > > >
> > > > >
> externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
> > > > >
> > externalContext.getResponseOutputStream().flush();
> > > > >                     context.responseComplete();
> > > > >                 }
> > > > >             } catch(Exception e) {
> > > > >                 logger.log(Level.SEVERE, "Error in streaming
> dynamic
> > > > > resource.", e);
> > > > >             } finally {
> > > > >                 session.remove(dynamicContentId);
> > > > >
> > > > >                 if(content != null) {
> > > > >                     content.getStream().close();
> > > > >                 }
> > > > >             }
> > > > >         }
> > > > >         else {
> > > > >            super.handleResourceRequest(context);
> > > > >         }
> > > > >     }
> > > > >
> > > > > }
> > > > >
> > > > > This at least works for me, hope it can help you too.
> > > > >
> > > > >
> > > > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > > > >
> > > > > > Hi Kito,
> > > > > >
> > > > > > CC:
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > >     <composite:interface>
> > > > > >         <composite:attribute name="pdfStream"
> > > > > > type="org.primefaces.model.StreamedContent" required="true" />
> > > > > >     </composite:interface>
> > > > > >
> > > > > >     <composite:implementation>
> > > > > >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
> > > > > height="600px"
> > > > > > player="pdf"/>
> > > > > >     </composite:implementation>
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > >
> > > > > > View:
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > >     <cc:myCC pdfStream="#{reportController.report} />
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > >
> > > > > > PF receives the Expression String via:
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > > media.getValueExpression("value").getExpressionString();
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > >
> > > > > > If it should work inside a CC, we must receive
> > > "#{cc.attrs.pdfStream}"
> > > > > > instead of "#{cc.attrs.pdfStream}".
> > > > > >
> > > > > > How can get the real expression here?
> > > > > >
> > > > > > Thanks,
> > > > > > Thomas
> > > > > >
> > > > > >
> > > > > > 2013/5/13 Kito Mann <ki...@virtua.com>
> > > > > >
> > > > > > > Hello Thomas,
> > > > > > >
> > > > > > > I think this is doable. Can you send us your composite
> component
> > > > code?
> > > > > > >
> > > > > > > ___
> > > > > > >
> > > > > > > Kito D. Mann | @kito99 | Author, JSF in Action
> > > > > > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training
> and
> > > > > > consulting
> > > > > > > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and
> > info |
> > > > > > > @jsfcentral
> > > > > > > +1 203-998-0403
> > > > > > >
> > > > > > > * JSF2 in Action Course - 6/17 - London:
> > > > > > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > > > > > > * Listen to the Enterprise Java Newscast: *
> > > > > > > http://blogs.jsfcentral.com/JSFNewscast/
> > > > > > > *
> > > > > > > * JSFCentral Interviews Podcast:
> > > > > > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > > > > > > * Sign up for the JSFCentral Newsletter:
> > > > > > > http://oi.vresp.com/?fid=ac048d0e17
> > > > > > >
> > > > > > >
> > > > > > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > > > > > > andraschko.thomas@gmail.com> wrote:
> > > > > > >
> > > > > > > > Hi,
> > > > > > > >
> > > > > > > > is it possible unwrap a CC ValueExpresion?
> > > > > > > > i found a bug with PrimeFaces p:media inside a composite
> > > component
> > > > > and
> > > > > > i
> > > > > > > > would like to fix it.
> > > > > > > >
> > > > > > > > If you pass the EL via a CC attr (e.g.
> #{myController.content})
> > > and
> > > > > > > attach
> > > > > > > > it to p:media (e.g. #{cc.attrs.content}),
> > > > > > > > p:media gets the ValueExpression and saves them in the
> session,
> > > to
> > > > > > later
> > > > > > > > stream the content in a resource request.
> > > > > > > > Later the ResourceHandler evaluates it and tries to get the
> > value
> > > > of
> > > > > > > > #{cc.attrs.content}, which can't work ofc.
> > > > > > > >
> > > > > > > > So is it possible to extract the "real" EL before store it in
> > the
> > > > > > > session?
> > > > > > > > Is there a solution which also works in mojarra?
> > > > > > > >
> > > > > > > >
> > > > > > > > Regards,
> > > > > > > > Thomas
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > > <br/>
> > > > > <br/>
> > > > > Mit freundlichen Grüßen,<br/>
> > > > > <hr/>
> > > > > <b>Christian Beikov</b><br/>
> > > > > Blazebit Design & Developing<br/>
> > > > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > <br/>
> > > <br/>
> > > Mit freundlichen Grüßen,<br/>
> > > <hr/>
> > > <b>Christian Beikov</b><br/>
> > > Blazebit Design & Developing<br/>
> > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> > >
> >
>
>
>
> --
> <br/>
> <br/>
> Mit freundlichen Grüßen,<br/>
> <hr/>
> <b>Christian Beikov</b><br/>
> Blazebit Design & Developing<br/>
> <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
>

Re: Unwrap CC ValueExpression?

Posted by Christian Beikov <ch...@gmail.com>.
What PF version are you using?


2013/5/13 Thomas Andraschko <an...@gmail.com>

> It's really view independent and  my Controller is RequestScoped.
> The only problem is that currently graphicImage/media/filedownload are
> unusable in a CC, if you need to pass the EL into the CC.
>
>
> 2013/5/13 Christian Beikov <ch...@gmail.com>
>
> > The difference is that it can handle the view based scopes where the
> > primefaces impl can't. But as I just realize this won't help you at all.
> > Sorry but for now I can't think of a reliable general purpose way to
> > retrieve the contents without rebuilding the view, I have to think about
> > it.
> > Do you need any context information like iteration status or so to
> evaluate
> > the expression to a meaningful value or is it completely independent of
> the
> > view?
> > What scope has the myController?
> >
> >
> > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> >
> > > Hi Christian,
> > >
> > > i don't understand your solution exactly.
> > > Whats the difference?
> > > It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
> > > evaluated without #pushComponentToEL(cc).
> > > Also #createView should be avoided for such a request IMO because of
> > > performance.
> > >
> > > Regards,
> > > Thomas
> > >
> > >
> > >
> > >
> > > 2013/5/13 Christian Beikov <ch...@gmail.com>
> > >
> > > > I'd rather say this should be fixed by restoring the view before
> > > accessing
> > > > the expression. I have done something like that for
> > > > DynamicContentResourceHandler which probably is used in this case
> here
> > > too.
> > > > Basically you need to save the viewId and the expression together in
> > the
> > > > session so you are able to restore the adequate expression in the
> > > resource
> > > > handler. I did the following for GraphicImageRenderer:
> > > >
> > > >
> > > >     @Override
> > > >     protected String getImageSrc(FacesContext context, GraphicImage
> > > image)
> > > > {
> > > >         String src = null;
> > > >         String name = image.getName();
> > > >
> > > >         if(name != null) {
> > > >             String libName = image.getLibrary();
> > > >             ResourceHandler handler =
> > > > context.getApplication().getResourceHandler();
> > > >             Resource res = handler.createResource(name, libName);
> > > >
> > > >             if(res == null) {
> > > >                 return "RES_NOT_FOUND";
> > > >             } else {
> > > >                 return
> > > > context.getExternalContext().encodeResourceURL(res.getRequestPath());
> > > >             }
> > > >         } else {
> > > >             Object value = image.getValue();
> > > >
> > > >             if (value == null) {
> > > >                 return "";
> > > >             } else  if(value instanceof String) {
> > > >                 src = getResourceURL(context, (String) value);
> > > >             } else if (value instanceof StreamedContent) {
> > > >                 ViewHandler viewHandler =
> > > > context.getApplication().getViewHandler();
> > > >                 StreamedContent streamedContent = (StreamedContent)
> > > value;
> > > >                 Resource resource =
> > > >
> > > >
> > >
> >
> context.getApplication().getResourceHandler().createResource("dynamiccontent",
> > > > "primefaces", streamedContent.getContentType());
> > > >                 String resourcePath = resource.getRequestPath();
> > > >
> > > >                 // servlet path/prefix is added already in
> > > > ViewHandler.getActionURL so remove it here
> > > >                 resourcePath =
> > > >
> resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
> > > >                 resourcePath = viewHandler.getActionURL(context,
> > > > resourcePath);
> > > >
> > > >                 String rid = createUniqueContentId(context);
> > > >                 StringBuilder builder = new
> > StringBuilder(resourcePath);
> > > >
> > > >                 if(resourcePath.contains("?"))
> > > >                     builder.append("&");
> > > >                 else
> > > >                     builder.append("?");
> > > >
> > > >
> > > >
> > > >
> > >
> >
> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
> > > >                 builder.append("&").append("ln=primefaces");
> > > >
> > > >                 for (UIComponent kid : image.getChildren()) {
> > > >                     if (kid instanceof UIParameter) {
> > > >                         UIParameter param = (UIParameter) kid;
> > > >
> > > >
> > > >
> > > >
> > >
> >
> builder.append("&").append(param.getName()).append("=").append(param.getValue());
> > > >                     }
> > > >                 }
> > > >
> > > >                 src = builder.toString();
> > > >                 Map<String, String> dynamicContentMap = new
> > > HashMap<String,
> > > > String>();
> > > >
> > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
> > > > image.getValueExpression("value").getExpressionString());
> > > >
> > > >
> > > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
> > > > context.getViewRoot().getViewId());
> > > >
> > > >                 context.getExternalContext().getSessionMap().put(rid,
> > > > dynamicContentMap);
> > > >             }
> > > >
> > > >             // Add caching if needed
> > > >             if (!image.isCache()) {
> > > >                 src += src.contains("?") ? "&" : "?";
> > > >                 src = src + "primefaces_image=" +
> > > > UUID.randomUUID().toString();
> > > >             }
> > > >
> > > >         }
> > > >
> > > >         return src;
> > > >     }
> > > >
> > > >
> > > > And then I have the DynamicContentResourceHandler:
> > > >
> > > > public class DynamicContentResourceHandler extends
> > PrimeResourceHandler{
> > > >
> > > >     private final static Logger logger =
> > > > Logger.getLogger(DynamicContentResourceHandler.class.getName());
> > > >
> > > >     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY =
> "viewId";
> > > >     public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
> > > > "valueExpression";
> > > >     public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";
> > > >
> > > >     public DynamicContentResourceHandler(ResourceHandler wrapped) {
> > > >         super(wrapped);
> > > >     }
> > > >
> > > >     @Override
> > > >     public void handleResourceRequest(FacesContext context) throws
> > > > IOException {
> > > >         Map<String,String> params =
> > > > context.getExternalContext().getRequestParameterMap();
> > > >         String library = params.get("ln");
> > > >         String dynamicContentId = params.get(DYNAMIC_CONTENT_PARAM);
> > > >
> > > >         if(dynamicContentId != null && library != null &&
> > > > library.equals("primefaces")) {
> > > >             Map<String,Object> session =
> > > > context.getExternalContext().getSessionMap();
> > > >             StreamedContent content = null;
> > > >
> > > >             try {
> > > >                 @SuppressWarnings("unchecked")
> > > >                 Map<String, String> dynamicContentMap = (Map<String,
> > > > String>) session.get(dynamicContentId);
> > > >
> > > >                 if(dynamicContentMap != null){
> > > >                     String viewId =
> > > > dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
> > > >                     String dynamicContentEL =
> > > > dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
> > > >
> > > >                     // Workaround for view based scopes
> > > >
> > > >
> > > >
> > >
> >
> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
> > > > viewId));
> > > >
> > > >                     ELContext eLContext = context.getELContext();
> > > >                     ValueExpression ve =
> > > >
> > > >
> > >
> >
> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
> > > > dynamicContentEL, StreamedContent.class);
> > > >                     content = (StreamedContent)
> ve.getValue(eLContext);
> > > >
> > > >                     ExternalContext externalContext =
> > > > context.getExternalContext();
> > > >
> > > > externalContext.setResponseStatus(HttpServletResponse.SC_OK);
> > > >
> > > > externalContext.setResponseContentType(content.getContentType());
> > > >
> > > >                     byte[] buffer = new byte[2048];
> > > >
> > > >                     int length;
> > > >                     InputStream inputStream = content.getStream();
> > > >
> > > >                     while ((length = (inputStream.read(buffer))) >=
> 0)
> > {
> > > >
> > > > externalContext.getResponseOutputStream().write(buffer, 0, length);
> > > >                     }
> > > >
> > > >
> externalContext.getResponseOutputStream().flush();
> > > >                     context.responseComplete();
> > > >                 } else {
> > > >                     ExternalContext externalContext =
> > > > context.getExternalContext();
> > > >
> > > > externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
> > > >
> externalContext.getResponseOutputStream().flush();
> > > >                     context.responseComplete();
> > > >                 }
> > > >             } catch(Exception e) {
> > > >                 logger.log(Level.SEVERE, "Error in streaming dynamic
> > > > resource.", e);
> > > >             } finally {
> > > >                 session.remove(dynamicContentId);
> > > >
> > > >                 if(content != null) {
> > > >                     content.getStream().close();
> > > >                 }
> > > >             }
> > > >         }
> > > >         else {
> > > >            super.handleResourceRequest(context);
> > > >         }
> > > >     }
> > > >
> > > > }
> > > >
> > > > This at least works for me, hope it can help you too.
> > > >
> > > >
> > > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > > >
> > > > > Hi Kito,
> > > > >
> > > > > CC:
> > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > >     <composite:interface>
> > > > >         <composite:attribute name="pdfStream"
> > > > > type="org.primefaces.model.StreamedContent" required="true" />
> > > > >     </composite:interface>
> > > > >
> > > > >     <composite:implementation>
> > > > >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
> > > > height="600px"
> > > > > player="pdf"/>
> > > > >     </composite:implementation>
> > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > >
> > > > > View:
> > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > >     <cc:myCC pdfStream="#{reportController.report} />
> > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > >
> > > > > PF receives the Expression String via:
> > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > > media.getValueExpression("value").getExpressionString();
> > > > >
> > > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > >
> > > > > If it should work inside a CC, we must receive
> > "#{cc.attrs.pdfStream}"
> > > > > instead of "#{cc.attrs.pdfStream}".
> > > > >
> > > > > How can get the real expression here?
> > > > >
> > > > > Thanks,
> > > > > Thomas
> > > > >
> > > > >
> > > > > 2013/5/13 Kito Mann <ki...@virtua.com>
> > > > >
> > > > > > Hello Thomas,
> > > > > >
> > > > > > I think this is doable. Can you send us your composite component
> > > code?
> > > > > >
> > > > > > ___
> > > > > >
> > > > > > Kito D. Mann | @kito99 | Author, JSF in Action
> > > > > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and
> > > > > consulting
> > > > > > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and
> info |
> > > > > > @jsfcentral
> > > > > > +1 203-998-0403
> > > > > >
> > > > > > * JSF2 in Action Course - 6/17 - London:
> > > > > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > > > > > * Listen to the Enterprise Java Newscast: *
> > > > > > http://blogs.jsfcentral.com/JSFNewscast/
> > > > > > *
> > > > > > * JSFCentral Interviews Podcast:
> > > > > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > > > > > * Sign up for the JSFCentral Newsletter:
> > > > > > http://oi.vresp.com/?fid=ac048d0e17
> > > > > >
> > > > > >
> > > > > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > > > > > andraschko.thomas@gmail.com> wrote:
> > > > > >
> > > > > > > Hi,
> > > > > > >
> > > > > > > is it possible unwrap a CC ValueExpresion?
> > > > > > > i found a bug with PrimeFaces p:media inside a composite
> > component
> > > > and
> > > > > i
> > > > > > > would like to fix it.
> > > > > > >
> > > > > > > If you pass the EL via a CC attr (e.g. #{myController.content})
> > and
> > > > > > attach
> > > > > > > it to p:media (e.g. #{cc.attrs.content}),
> > > > > > > p:media gets the ValueExpression and saves them in the session,
> > to
> > > > > later
> > > > > > > stream the content in a resource request.
> > > > > > > Later the ResourceHandler evaluates it and tries to get the
> value
> > > of
> > > > > > > #{cc.attrs.content}, which can't work ofc.
> > > > > > >
> > > > > > > So is it possible to extract the "real" EL before store it in
> the
> > > > > > session?
> > > > > > > Is there a solution which also works in mojarra?
> > > > > > >
> > > > > > >
> > > > > > > Regards,
> > > > > > > Thomas
> > > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > <br/>
> > > > <br/>
> > > > Mit freundlichen Grüßen,<br/>
> > > > <hr/>
> > > > <b>Christian Beikov</b><br/>
> > > > Blazebit Design & Developing<br/>
> > > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> > > >
> > >
> >
> >
> >
> > --
> > <br/>
> > <br/>
> > Mit freundlichen Grüßen,<br/>
> > <hr/>
> > <b>Christian Beikov</b><br/>
> > Blazebit Design & Developing<br/>
> > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> >
>



-- 
<br/>
<br/>
Mit freundlichen Grüßen,<br/>
<hr/>
<b>Christian Beikov</b><br/>
Blazebit Design & Developing<br/>
<a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>

Re: Unwrap CC ValueExpression?

Posted by Thomas Andraschko <an...@gmail.com>.
It's really view independent and  my Controller is RequestScoped.
The only problem is that currently graphicImage/media/filedownload are
unusable in a CC, if you need to pass the EL into the CC.


2013/5/13 Christian Beikov <ch...@gmail.com>

> The difference is that it can handle the view based scopes where the
> primefaces impl can't. But as I just realize this won't help you at all.
> Sorry but for now I can't think of a reliable general purpose way to
> retrieve the contents without rebuilding the view, I have to think about
> it.
> Do you need any context information like iteration status or so to evaluate
> the expression to a meaningful value or is it completely independent of the
> view?
> What scope has the myController?
>
>
> 2013/5/13 Thomas Andraschko <an...@gmail.com>
>
> > Hi Christian,
> >
> > i don't understand your solution exactly.
> > Whats the difference?
> > It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
> > evaluated without #pushComponentToEL(cc).
> > Also #createView should be avoided for such a request IMO because of
> > performance.
> >
> > Regards,
> > Thomas
> >
> >
> >
> >
> > 2013/5/13 Christian Beikov <ch...@gmail.com>
> >
> > > I'd rather say this should be fixed by restoring the view before
> > accessing
> > > the expression. I have done something like that for
> > > DynamicContentResourceHandler which probably is used in this case here
> > too.
> > > Basically you need to save the viewId and the expression together in
> the
> > > session so you are able to restore the adequate expression in the
> > resource
> > > handler. I did the following for GraphicImageRenderer:
> > >
> > >
> > >     @Override
> > >     protected String getImageSrc(FacesContext context, GraphicImage
> > image)
> > > {
> > >         String src = null;
> > >         String name = image.getName();
> > >
> > >         if(name != null) {
> > >             String libName = image.getLibrary();
> > >             ResourceHandler handler =
> > > context.getApplication().getResourceHandler();
> > >             Resource res = handler.createResource(name, libName);
> > >
> > >             if(res == null) {
> > >                 return "RES_NOT_FOUND";
> > >             } else {
> > >                 return
> > > context.getExternalContext().encodeResourceURL(res.getRequestPath());
> > >             }
> > >         } else {
> > >             Object value = image.getValue();
> > >
> > >             if (value == null) {
> > >                 return "";
> > >             } else  if(value instanceof String) {
> > >                 src = getResourceURL(context, (String) value);
> > >             } else if (value instanceof StreamedContent) {
> > >                 ViewHandler viewHandler =
> > > context.getApplication().getViewHandler();
> > >                 StreamedContent streamedContent = (StreamedContent)
> > value;
> > >                 Resource resource =
> > >
> > >
> >
> context.getApplication().getResourceHandler().createResource("dynamiccontent",
> > > "primefaces", streamedContent.getContentType());
> > >                 String resourcePath = resource.getRequestPath();
> > >
> > >                 // servlet path/prefix is added already in
> > > ViewHandler.getActionURL so remove it here
> > >                 resourcePath =
> > > resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
> > >                 resourcePath = viewHandler.getActionURL(context,
> > > resourcePath);
> > >
> > >                 String rid = createUniqueContentId(context);
> > >                 StringBuilder builder = new
> StringBuilder(resourcePath);
> > >
> > >                 if(resourcePath.contains("?"))
> > >                     builder.append("&");
> > >                 else
> > >                     builder.append("?");
> > >
> > >
> > >
> > >
> >
> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
> > >                 builder.append("&").append("ln=primefaces");
> > >
> > >                 for (UIComponent kid : image.getChildren()) {
> > >                     if (kid instanceof UIParameter) {
> > >                         UIParameter param = (UIParameter) kid;
> > >
> > >
> > >
> > >
> >
> builder.append("&").append(param.getName()).append("=").append(param.getValue());
> > >                     }
> > >                 }
> > >
> > >                 src = builder.toString();
> > >                 Map<String, String> dynamicContentMap = new
> > HashMap<String,
> > > String>();
> > >
> > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
> > > image.getValueExpression("value").getExpressionString());
> > >
> > >
> > >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
> > > context.getViewRoot().getViewId());
> > >
> > >                 context.getExternalContext().getSessionMap().put(rid,
> > > dynamicContentMap);
> > >             }
> > >
> > >             // Add caching if needed
> > >             if (!image.isCache()) {
> > >                 src += src.contains("?") ? "&" : "?";
> > >                 src = src + "primefaces_image=" +
> > > UUID.randomUUID().toString();
> > >             }
> > >
> > >         }
> > >
> > >         return src;
> > >     }
> > >
> > >
> > > And then I have the DynamicContentResourceHandler:
> > >
> > > public class DynamicContentResourceHandler extends
> PrimeResourceHandler{
> > >
> > >     private final static Logger logger =
> > > Logger.getLogger(DynamicContentResourceHandler.class.getName());
> > >
> > >     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY = "viewId";
> > >     public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
> > > "valueExpression";
> > >     public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";
> > >
> > >     public DynamicContentResourceHandler(ResourceHandler wrapped) {
> > >         super(wrapped);
> > >     }
> > >
> > >     @Override
> > >     public void handleResourceRequest(FacesContext context) throws
> > > IOException {
> > >         Map<String,String> params =
> > > context.getExternalContext().getRequestParameterMap();
> > >         String library = params.get("ln");
> > >         String dynamicContentId = params.get(DYNAMIC_CONTENT_PARAM);
> > >
> > >         if(dynamicContentId != null && library != null &&
> > > library.equals("primefaces")) {
> > >             Map<String,Object> session =
> > > context.getExternalContext().getSessionMap();
> > >             StreamedContent content = null;
> > >
> > >             try {
> > >                 @SuppressWarnings("unchecked")
> > >                 Map<String, String> dynamicContentMap = (Map<String,
> > > String>) session.get(dynamicContentId);
> > >
> > >                 if(dynamicContentMap != null){
> > >                     String viewId =
> > > dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
> > >                     String dynamicContentEL =
> > > dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
> > >
> > >                     // Workaround for view based scopes
> > >
> > >
> > >
> >
> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
> > > viewId));
> > >
> > >                     ELContext eLContext = context.getELContext();
> > >                     ValueExpression ve =
> > >
> > >
> >
> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
> > > dynamicContentEL, StreamedContent.class);
> > >                     content = (StreamedContent) ve.getValue(eLContext);
> > >
> > >                     ExternalContext externalContext =
> > > context.getExternalContext();
> > >
> > > externalContext.setResponseStatus(HttpServletResponse.SC_OK);
> > >
> > > externalContext.setResponseContentType(content.getContentType());
> > >
> > >                     byte[] buffer = new byte[2048];
> > >
> > >                     int length;
> > >                     InputStream inputStream = content.getStream();
> > >
> > >                     while ((length = (inputStream.read(buffer))) >= 0)
> {
> > >
> > > externalContext.getResponseOutputStream().write(buffer, 0, length);
> > >                     }
> > >
> > >                     externalContext.getResponseOutputStream().flush();
> > >                     context.responseComplete();
> > >                 } else {
> > >                     ExternalContext externalContext =
> > > context.getExternalContext();
> > >
> > > externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
> > >                     externalContext.getResponseOutputStream().flush();
> > >                     context.responseComplete();
> > >                 }
> > >             } catch(Exception e) {
> > >                 logger.log(Level.SEVERE, "Error in streaming dynamic
> > > resource.", e);
> > >             } finally {
> > >                 session.remove(dynamicContentId);
> > >
> > >                 if(content != null) {
> > >                     content.getStream().close();
> > >                 }
> > >             }
> > >         }
> > >         else {
> > >            super.handleResourceRequest(context);
> > >         }
> > >     }
> > >
> > > }
> > >
> > > This at least works for me, hope it can help you too.
> > >
> > >
> > > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> > >
> > > > Hi Kito,
> > > >
> > > > CC:
> > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > >     <composite:interface>
> > > >         <composite:attribute name="pdfStream"
> > > > type="org.primefaces.model.StreamedContent" required="true" />
> > > >     </composite:interface>
> > > >
> > > >     <composite:implementation>
> > > >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
> > > height="600px"
> > > > player="pdf"/>
> > > >     </composite:implementation>
> > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > >
> > > > View:
> > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > >     <cc:myCC pdfStream="#{reportController.report} />
> > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > >
> > > > PF receives the Expression String via:
> > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > > media.getValueExpression("value").getExpressionString();
> > > >
> > > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > >
> > > > If it should work inside a CC, we must receive
> "#{cc.attrs.pdfStream}"
> > > > instead of "#{cc.attrs.pdfStream}".
> > > >
> > > > How can get the real expression here?
> > > >
> > > > Thanks,
> > > > Thomas
> > > >
> > > >
> > > > 2013/5/13 Kito Mann <ki...@virtua.com>
> > > >
> > > > > Hello Thomas,
> > > > >
> > > > > I think this is doable. Can you send us your composite component
> > code?
> > > > >
> > > > > ___
> > > > >
> > > > > Kito D. Mann | @kito99 | Author, JSF in Action
> > > > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and
> > > > consulting
> > > > > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
> > > > > @jsfcentral
> > > > > +1 203-998-0403
> > > > >
> > > > > * JSF2 in Action Course - 6/17 - London:
> > > > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > > > > * Listen to the Enterprise Java Newscast: *
> > > > > http://blogs.jsfcentral.com/JSFNewscast/
> > > > > *
> > > > > * JSFCentral Interviews Podcast:
> > > > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > > > > * Sign up for the JSFCentral Newsletter:
> > > > > http://oi.vresp.com/?fid=ac048d0e17
> > > > >
> > > > >
> > > > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > > > > andraschko.thomas@gmail.com> wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > is it possible unwrap a CC ValueExpresion?
> > > > > > i found a bug with PrimeFaces p:media inside a composite
> component
> > > and
> > > > i
> > > > > > would like to fix it.
> > > > > >
> > > > > > If you pass the EL via a CC attr (e.g. #{myController.content})
> and
> > > > > attach
> > > > > > it to p:media (e.g. #{cc.attrs.content}),
> > > > > > p:media gets the ValueExpression and saves them in the session,
> to
> > > > later
> > > > > > stream the content in a resource request.
> > > > > > Later the ResourceHandler evaluates it and tries to get the value
> > of
> > > > > > #{cc.attrs.content}, which can't work ofc.
> > > > > >
> > > > > > So is it possible to extract the "real" EL before store it in the
> > > > > session?
> > > > > > Is there a solution which also works in mojarra?
> > > > > >
> > > > > >
> > > > > > Regards,
> > > > > > Thomas
> > > > > >
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > <br/>
> > > <br/>
> > > Mit freundlichen Grüßen,<br/>
> > > <hr/>
> > > <b>Christian Beikov</b><br/>
> > > Blazebit Design & Developing<br/>
> > > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> > >
> >
>
>
>
> --
> <br/>
> <br/>
> Mit freundlichen Grüßen,<br/>
> <hr/>
> <b>Christian Beikov</b><br/>
> Blazebit Design & Developing<br/>
> <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
>

Re: Unwrap CC ValueExpression?

Posted by Christian Beikov <ch...@gmail.com>.
The difference is that it can handle the view based scopes where the
primefaces impl can't. But as I just realize this won't help you at all.
Sorry but for now I can't think of a reliable general purpose way to
retrieve the contents without rebuilding the view, I have to think about it.
Do you need any context information like iteration status or so to evaluate
the expression to a meaningful value or is it completely independent of the
view?
What scope has the myController?


2013/5/13 Thomas Andraschko <an...@gmail.com>

> Hi Christian,
>
> i don't understand your solution exactly.
> Whats the difference?
> It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
> evaluated without #pushComponentToEL(cc).
> Also #createView should be avoided for such a request IMO because of
> performance.
>
> Regards,
> Thomas
>
>
>
>
> 2013/5/13 Christian Beikov <ch...@gmail.com>
>
> > I'd rather say this should be fixed by restoring the view before
> accessing
> > the expression. I have done something like that for
> > DynamicContentResourceHandler which probably is used in this case here
> too.
> > Basically you need to save the viewId and the expression together in the
> > session so you are able to restore the adequate expression in the
> resource
> > handler. I did the following for GraphicImageRenderer:
> >
> >
> >     @Override
> >     protected String getImageSrc(FacesContext context, GraphicImage
> image)
> > {
> >         String src = null;
> >         String name = image.getName();
> >
> >         if(name != null) {
> >             String libName = image.getLibrary();
> >             ResourceHandler handler =
> > context.getApplication().getResourceHandler();
> >             Resource res = handler.createResource(name, libName);
> >
> >             if(res == null) {
> >                 return "RES_NOT_FOUND";
> >             } else {
> >                 return
> > context.getExternalContext().encodeResourceURL(res.getRequestPath());
> >             }
> >         } else {
> >             Object value = image.getValue();
> >
> >             if (value == null) {
> >                 return "";
> >             } else  if(value instanceof String) {
> >                 src = getResourceURL(context, (String) value);
> >             } else if (value instanceof StreamedContent) {
> >                 ViewHandler viewHandler =
> > context.getApplication().getViewHandler();
> >                 StreamedContent streamedContent = (StreamedContent)
> value;
> >                 Resource resource =
> >
> >
> context.getApplication().getResourceHandler().createResource("dynamiccontent",
> > "primefaces", streamedContent.getContentType());
> >                 String resourcePath = resource.getRequestPath();
> >
> >                 // servlet path/prefix is added already in
> > ViewHandler.getActionURL so remove it here
> >                 resourcePath =
> > resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
> >                 resourcePath = viewHandler.getActionURL(context,
> > resourcePath);
> >
> >                 String rid = createUniqueContentId(context);
> >                 StringBuilder builder = new StringBuilder(resourcePath);
> >
> >                 if(resourcePath.contains("?"))
> >                     builder.append("&");
> >                 else
> >                     builder.append("?");
> >
> >
> >
> >
> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
> >                 builder.append("&").append("ln=primefaces");
> >
> >                 for (UIComponent kid : image.getChildren()) {
> >                     if (kid instanceof UIParameter) {
> >                         UIParameter param = (UIParameter) kid;
> >
> >
> >
> >
> builder.append("&").append(param.getName()).append("=").append(param.getValue());
> >                     }
> >                 }
> >
> >                 src = builder.toString();
> >                 Map<String, String> dynamicContentMap = new
> HashMap<String,
> > String>();
> >
> >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
> > image.getValueExpression("value").getExpressionString());
> >
> >
> >
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
> > context.getViewRoot().getViewId());
> >
> >                 context.getExternalContext().getSessionMap().put(rid,
> > dynamicContentMap);
> >             }
> >
> >             // Add caching if needed
> >             if (!image.isCache()) {
> >                 src += src.contains("?") ? "&" : "?";
> >                 src = src + "primefaces_image=" +
> > UUID.randomUUID().toString();
> >             }
> >
> >         }
> >
> >         return src;
> >     }
> >
> >
> > And then I have the DynamicContentResourceHandler:
> >
> > public class DynamicContentResourceHandler extends PrimeResourceHandler{
> >
> >     private final static Logger logger =
> > Logger.getLogger(DynamicContentResourceHandler.class.getName());
> >
> >     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY = "viewId";
> >     public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
> > "valueExpression";
> >     public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";
> >
> >     public DynamicContentResourceHandler(ResourceHandler wrapped) {
> >         super(wrapped);
> >     }
> >
> >     @Override
> >     public void handleResourceRequest(FacesContext context) throws
> > IOException {
> >         Map<String,String> params =
> > context.getExternalContext().getRequestParameterMap();
> >         String library = params.get("ln");
> >         String dynamicContentId = params.get(DYNAMIC_CONTENT_PARAM);
> >
> >         if(dynamicContentId != null && library != null &&
> > library.equals("primefaces")) {
> >             Map<String,Object> session =
> > context.getExternalContext().getSessionMap();
> >             StreamedContent content = null;
> >
> >             try {
> >                 @SuppressWarnings("unchecked")
> >                 Map<String, String> dynamicContentMap = (Map<String,
> > String>) session.get(dynamicContentId);
> >
> >                 if(dynamicContentMap != null){
> >                     String viewId =
> > dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
> >                     String dynamicContentEL =
> > dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
> >
> >                     // Workaround for view based scopes
> >
> >
> >
> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
> > viewId));
> >
> >                     ELContext eLContext = context.getELContext();
> >                     ValueExpression ve =
> >
> >
> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
> > dynamicContentEL, StreamedContent.class);
> >                     content = (StreamedContent) ve.getValue(eLContext);
> >
> >                     ExternalContext externalContext =
> > context.getExternalContext();
> >
> > externalContext.setResponseStatus(HttpServletResponse.SC_OK);
> >
> > externalContext.setResponseContentType(content.getContentType());
> >
> >                     byte[] buffer = new byte[2048];
> >
> >                     int length;
> >                     InputStream inputStream = content.getStream();
> >
> >                     while ((length = (inputStream.read(buffer))) >= 0) {
> >
> > externalContext.getResponseOutputStream().write(buffer, 0, length);
> >                     }
> >
> >                     externalContext.getResponseOutputStream().flush();
> >                     context.responseComplete();
> >                 } else {
> >                     ExternalContext externalContext =
> > context.getExternalContext();
> >
> > externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
> >                     externalContext.getResponseOutputStream().flush();
> >                     context.responseComplete();
> >                 }
> >             } catch(Exception e) {
> >                 logger.log(Level.SEVERE, "Error in streaming dynamic
> > resource.", e);
> >             } finally {
> >                 session.remove(dynamicContentId);
> >
> >                 if(content != null) {
> >                     content.getStream().close();
> >                 }
> >             }
> >         }
> >         else {
> >            super.handleResourceRequest(context);
> >         }
> >     }
> >
> > }
> >
> > This at least works for me, hope it can help you too.
> >
> >
> > 2013/5/13 Thomas Andraschko <an...@gmail.com>
> >
> > > Hi Kito,
> > >
> > > CC:
> > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > >     <composite:interface>
> > >         <composite:attribute name="pdfStream"
> > > type="org.primefaces.model.StreamedContent" required="true" />
> > >     </composite:interface>
> > >
> > >     <composite:implementation>
> > >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
> > height="600px"
> > > player="pdf"/>
> > >     </composite:implementation>
> > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > >
> > > View:
> > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > >     <cc:myCC pdfStream="#{reportController.report} />
> > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > >
> > > PF receives the Expression String via:
> > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > > media.getValueExpression("value").getExpressionString();
> > >
> > >
> >
> ----------------------------------------------------------------------------------------------------------------
> > >
> > > If it should work inside a CC, we must receive "#{cc.attrs.pdfStream}"
> > > instead of "#{cc.attrs.pdfStream}".
> > >
> > > How can get the real expression here?
> > >
> > > Thanks,
> > > Thomas
> > >
> > >
> > > 2013/5/13 Kito Mann <ki...@virtua.com>
> > >
> > > > Hello Thomas,
> > > >
> > > > I think this is doable. Can you send us your composite component
> code?
> > > >
> > > > ___
> > > >
> > > > Kito D. Mann | @kito99 | Author, JSF in Action
> > > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and
> > > consulting
> > > > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
> > > > @jsfcentral
> > > > +1 203-998-0403
> > > >
> > > > * JSF2 in Action Course - 6/17 - London:
> > > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > > > * Listen to the Enterprise Java Newscast: *
> > > > http://blogs.jsfcentral.com/JSFNewscast/
> > > > *
> > > > * JSFCentral Interviews Podcast:
> > > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > > > * Sign up for the JSFCentral Newsletter:
> > > > http://oi.vresp.com/?fid=ac048d0e17
> > > >
> > > >
> > > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > > > andraschko.thomas@gmail.com> wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > is it possible unwrap a CC ValueExpresion?
> > > > > i found a bug with PrimeFaces p:media inside a composite component
> > and
> > > i
> > > > > would like to fix it.
> > > > >
> > > > > If you pass the EL via a CC attr (e.g. #{myController.content}) and
> > > > attach
> > > > > it to p:media (e.g. #{cc.attrs.content}),
> > > > > p:media gets the ValueExpression and saves them in the session, to
> > > later
> > > > > stream the content in a resource request.
> > > > > Later the ResourceHandler evaluates it and tries to get the value
> of
> > > > > #{cc.attrs.content}, which can't work ofc.
> > > > >
> > > > > So is it possible to extract the "real" EL before store it in the
> > > > session?
> > > > > Is there a solution which also works in mojarra?
> > > > >
> > > > >
> > > > > Regards,
> > > > > Thomas
> > > > >
> > > >
> > >
> >
> >
> >
> > --
> > <br/>
> > <br/>
> > Mit freundlichen Grüßen,<br/>
> > <hr/>
> > <b>Christian Beikov</b><br/>
> > Blazebit Design & Developing<br/>
> > <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
> >
>



-- 
<br/>
<br/>
Mit freundlichen Grüßen,<br/>
<hr/>
<b>Christian Beikov</b><br/>
Blazebit Design & Developing<br/>
<a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>

Re: Unwrap CC ValueExpression?

Posted by Thomas Andraschko <an...@gmail.com>.
Hi Christian,

i don't understand your solution exactly.
Whats the difference?
It would still store the #{cc.attrs.xxx} expression and #{cc} cant be
evaluated without #pushComponentToEL(cc).
Also #createView should be avoided for such a request IMO because of
performance.

Regards,
Thomas




2013/5/13 Christian Beikov <ch...@gmail.com>

> I'd rather say this should be fixed by restoring the view before accessing
> the expression. I have done something like that for
> DynamicContentResourceHandler which probably is used in this case here too.
> Basically you need to save the viewId and the expression together in the
> session so you are able to restore the adequate expression in the resource
> handler. I did the following for GraphicImageRenderer:
>
>
>     @Override
>     protected String getImageSrc(FacesContext context, GraphicImage image)
> {
>         String src = null;
>         String name = image.getName();
>
>         if(name != null) {
>             String libName = image.getLibrary();
>             ResourceHandler handler =
> context.getApplication().getResourceHandler();
>             Resource res = handler.createResource(name, libName);
>
>             if(res == null) {
>                 return "RES_NOT_FOUND";
>             } else {
>                 return
> context.getExternalContext().encodeResourceURL(res.getRequestPath());
>             }
>         } else {
>             Object value = image.getValue();
>
>             if (value == null) {
>                 return "";
>             } else  if(value instanceof String) {
>                 src = getResourceURL(context, (String) value);
>             } else if (value instanceof StreamedContent) {
>                 ViewHandler viewHandler =
> context.getApplication().getViewHandler();
>                 StreamedContent streamedContent = (StreamedContent) value;
>                 Resource resource =
>
> context.getApplication().getResourceHandler().createResource("dynamiccontent",
> "primefaces", streamedContent.getContentType());
>                 String resourcePath = resource.getRequestPath();
>
>                 // servlet path/prefix is added already in
> ViewHandler.getActionURL so remove it here
>                 resourcePath =
> resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
>                 resourcePath = viewHandler.getActionURL(context,
> resourcePath);
>
>                 String rid = createUniqueContentId(context);
>                 StringBuilder builder = new StringBuilder(resourcePath);
>
>                 if(resourcePath.contains("?"))
>                     builder.append("&");
>                 else
>                     builder.append("?");
>
>
>
> builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
>                 builder.append("&").append("ln=primefaces");
>
>                 for (UIComponent kid : image.getChildren()) {
>                     if (kid instanceof UIParameter) {
>                         UIParameter param = (UIParameter) kid;
>
>
>
> builder.append("&").append(param.getName()).append("=").append(param.getValue());
>                     }
>                 }
>
>                 src = builder.toString();
>                 Map<String, String> dynamicContentMap = new HashMap<String,
> String>();
>
>
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
> image.getValueExpression("value").getExpressionString());
>
>
> dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
> context.getViewRoot().getViewId());
>
>                 context.getExternalContext().getSessionMap().put(rid,
> dynamicContentMap);
>             }
>
>             // Add caching if needed
>             if (!image.isCache()) {
>                 src += src.contains("?") ? "&" : "?";
>                 src = src + "primefaces_image=" +
> UUID.randomUUID().toString();
>             }
>
>         }
>
>         return src;
>     }
>
>
> And then I have the DynamicContentResourceHandler:
>
> public class DynamicContentResourceHandler extends PrimeResourceHandler{
>
>     private final static Logger logger =
> Logger.getLogger(DynamicContentResourceHandler.class.getName());
>
>     public static final String DYNAMIC_CONTENT_VIEW_ID_KEY = "viewId";
>     public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
> "valueExpression";
>     public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";
>
>     public DynamicContentResourceHandler(ResourceHandler wrapped) {
>         super(wrapped);
>     }
>
>     @Override
>     public void handleResourceRequest(FacesContext context) throws
> IOException {
>         Map<String,String> params =
> context.getExternalContext().getRequestParameterMap();
>         String library = params.get("ln");
>         String dynamicContentId = params.get(DYNAMIC_CONTENT_PARAM);
>
>         if(dynamicContentId != null && library != null &&
> library.equals("primefaces")) {
>             Map<String,Object> session =
> context.getExternalContext().getSessionMap();
>             StreamedContent content = null;
>
>             try {
>                 @SuppressWarnings("unchecked")
>                 Map<String, String> dynamicContentMap = (Map<String,
> String>) session.get(dynamicContentId);
>
>                 if(dynamicContentMap != null){
>                     String viewId =
> dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
>                     String dynamicContentEL =
> dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);
>
>                     // Workaround for view based scopes
>
>
> context.setViewRoot(context.getApplication().getViewHandler().createView(context,
> viewId));
>
>                     ELContext eLContext = context.getELContext();
>                     ValueExpression ve =
>
> context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
> dynamicContentEL, StreamedContent.class);
>                     content = (StreamedContent) ve.getValue(eLContext);
>
>                     ExternalContext externalContext =
> context.getExternalContext();
>
> externalContext.setResponseStatus(HttpServletResponse.SC_OK);
>
> externalContext.setResponseContentType(content.getContentType());
>
>                     byte[] buffer = new byte[2048];
>
>                     int length;
>                     InputStream inputStream = content.getStream();
>
>                     while ((length = (inputStream.read(buffer))) >= 0) {
>
> externalContext.getResponseOutputStream().write(buffer, 0, length);
>                     }
>
>                     externalContext.getResponseOutputStream().flush();
>                     context.responseComplete();
>                 } else {
>                     ExternalContext externalContext =
> context.getExternalContext();
>
> externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
>                     externalContext.getResponseOutputStream().flush();
>                     context.responseComplete();
>                 }
>             } catch(Exception e) {
>                 logger.log(Level.SEVERE, "Error in streaming dynamic
> resource.", e);
>             } finally {
>                 session.remove(dynamicContentId);
>
>                 if(content != null) {
>                     content.getStream().close();
>                 }
>             }
>         }
>         else {
>            super.handleResourceRequest(context);
>         }
>     }
>
> }
>
> This at least works for me, hope it can help you too.
>
>
> 2013/5/13 Thomas Andraschko <an...@gmail.com>
>
> > Hi Kito,
> >
> > CC:
> >
> >
> ----------------------------------------------------------------------------------------------------------------
> >     <composite:interface>
> >         <composite:attribute name="pdfStream"
> > type="org.primefaces.model.StreamedContent" required="true" />
> >     </composite:interface>
> >
> >     <composite:implementation>
> >         <p:media value="#{cc.attrs.pdfStream}" width="100%"
> height="600px"
> > player="pdf"/>
> >     </composite:implementation>
> >
> >
> ----------------------------------------------------------------------------------------------------------------
> >
> > View:
> >
> >
> ----------------------------------------------------------------------------------------------------------------
> >     <cc:myCC pdfStream="#{reportController.report} />
> >
> >
> ----------------------------------------------------------------------------------------------------------------
> >
> > PF receives the Expression String via:
> >
> >
> ----------------------------------------------------------------------------------------------------------------
> > media.getValueExpression("value").getExpressionString();
> >
> >
> ----------------------------------------------------------------------------------------------------------------
> >
> > If it should work inside a CC, we must receive "#{cc.attrs.pdfStream}"
> > instead of "#{cc.attrs.pdfStream}".
> >
> > How can get the real expression here?
> >
> > Thanks,
> > Thomas
> >
> >
> > 2013/5/13 Kito Mann <ki...@virtua.com>
> >
> > > Hello Thomas,
> > >
> > > I think this is doable. Can you send us your composite component code?
> > >
> > > ___
> > >
> > > Kito D. Mann | @kito99 | Author, JSF in Action
> > > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and
> > consulting
> > > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
> > > @jsfcentral
> > > +1 203-998-0403
> > >
> > > * JSF2 in Action Course - 6/17 - London:
> > > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > > * Listen to the Enterprise Java Newscast: *
> > > http://blogs.jsfcentral.com/JSFNewscast/
> > > *
> > > * JSFCentral Interviews Podcast:
> > > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > > * Sign up for the JSFCentral Newsletter:
> > > http://oi.vresp.com/?fid=ac048d0e17
> > >
> > >
> > > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > > andraschko.thomas@gmail.com> wrote:
> > >
> > > > Hi,
> > > >
> > > > is it possible unwrap a CC ValueExpresion?
> > > > i found a bug with PrimeFaces p:media inside a composite component
> and
> > i
> > > > would like to fix it.
> > > >
> > > > If you pass the EL via a CC attr (e.g. #{myController.content}) and
> > > attach
> > > > it to p:media (e.g. #{cc.attrs.content}),
> > > > p:media gets the ValueExpression and saves them in the session, to
> > later
> > > > stream the content in a resource request.
> > > > Later the ResourceHandler evaluates it and tries to get the value of
> > > > #{cc.attrs.content}, which can't work ofc.
> > > >
> > > > So is it possible to extract the "real" EL before store it in the
> > > session?
> > > > Is there a solution which also works in mojarra?
> > > >
> > > >
> > > > Regards,
> > > > Thomas
> > > >
> > >
> >
>
>
>
> --
> <br/>
> <br/>
> Mit freundlichen Grüßen,<br/>
> <hr/>
> <b>Christian Beikov</b><br/>
> Blazebit Design & Developing<br/>
> <a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>
>

Re: Unwrap CC ValueExpression?

Posted by Christian Beikov <ch...@gmail.com>.
I'd rather say this should be fixed by restoring the view before accessing
the expression. I have done something like that for
DynamicContentResourceHandler which probably is used in this case here too.
Basically you need to save the viewId and the expression together in the
session so you are able to restore the adequate expression in the resource
handler. I did the following for GraphicImageRenderer:


    @Override
    protected String getImageSrc(FacesContext context, GraphicImage image) {
        String src = null;
        String name = image.getName();

        if(name != null) {
            String libName = image.getLibrary();
            ResourceHandler handler =
context.getApplication().getResourceHandler();
            Resource res = handler.createResource(name, libName);

            if(res == null) {
                return "RES_NOT_FOUND";
            } else {
                return
context.getExternalContext().encodeResourceURL(res.getRequestPath());
            }
        } else {
            Object value = image.getValue();

            if (value == null) {
                return "";
            } else  if(value instanceof String) {
                src = getResourceURL(context, (String) value);
            } else if (value instanceof StreamedContent) {
                ViewHandler viewHandler =
context.getApplication().getViewHandler();
                StreamedContent streamedContent = (StreamedContent) value;
                Resource resource =
context.getApplication().getResourceHandler().createResource("dynamiccontent",
"primefaces", streamedContent.getContentType());
                String resourcePath = resource.getRequestPath();

                // servlet path/prefix is added already in
ViewHandler.getActionURL so remove it here
                resourcePath =
resourcePath.substring(resourcePath.indexOf("/javax.faces.resource/"));
                resourcePath = viewHandler.getActionURL(context,
resourcePath);

                String rid = createUniqueContentId(context);
                StringBuilder builder = new StringBuilder(resourcePath);

                if(resourcePath.contains("?"))
                    builder.append("&");
                else
                    builder.append("?");


builder.append(DynamicContentResourceHandler.DYNAMIC_CONTENT_PARAM).append("=").append(rid);
                builder.append("&").append("ln=primefaces");

                for (UIComponent kid : image.getChildren()) {
                    if (kid instanceof UIParameter) {
                        UIParameter param = (UIParameter) kid;


builder.append("&").append(param.getName()).append("=").append(param.getValue());
                    }
                }

                src = builder.toString();
                Map<String, String> dynamicContentMap = new HashMap<String,
String>();

dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY,
image.getValueExpression("value").getExpressionString());

dynamicContentMap.put(DynamicContentResourceHandler.DYNAMIC_CONTENT_VIEW_ID_KEY,
context.getViewRoot().getViewId());

                context.getExternalContext().getSessionMap().put(rid,
dynamicContentMap);
            }

            // Add caching if needed
            if (!image.isCache()) {
                src += src.contains("?") ? "&" : "?";
                src = src + "primefaces_image=" +
UUID.randomUUID().toString();
            }

        }

        return src;
    }


And then I have the DynamicContentResourceHandler:

public class DynamicContentResourceHandler extends PrimeResourceHandler{

    private final static Logger logger =
Logger.getLogger(DynamicContentResourceHandler.class.getName());

    public static final String DYNAMIC_CONTENT_VIEW_ID_KEY = "viewId";
    public static final String DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY =
"valueExpression";
    public static final String DYNAMIC_CONTENT_PARAM = "pfdrid";

    public DynamicContentResourceHandler(ResourceHandler wrapped) {
        super(wrapped);
    }

    @Override
    public void handleResourceRequest(FacesContext context) throws
IOException {
        Map<String,String> params =
context.getExternalContext().getRequestParameterMap();
        String library = params.get("ln");
        String dynamicContentId = params.get(DYNAMIC_CONTENT_PARAM);

        if(dynamicContentId != null && library != null &&
library.equals("primefaces")) {
            Map<String,Object> session =
context.getExternalContext().getSessionMap();
            StreamedContent content = null;

            try {
                @SuppressWarnings("unchecked")
                Map<String, String> dynamicContentMap = (Map<String,
String>) session.get(dynamicContentId);

                if(dynamicContentMap != null){
                    String viewId =
dynamicContentMap.get(DYNAMIC_CONTENT_VIEW_ID_KEY);
                    String dynamicContentEL =
dynamicContentMap.get(DYNAMIC_CONTENT_VALUE_EXPRESSION_KEY);

                    // Workaround for view based scopes

context.setViewRoot(context.getApplication().getViewHandler().createView(context,
viewId));

                    ELContext eLContext = context.getELContext();
                    ValueExpression ve =
context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(),
dynamicContentEL, StreamedContent.class);
                    content = (StreamedContent) ve.getValue(eLContext);

                    ExternalContext externalContext =
context.getExternalContext();

externalContext.setResponseStatus(HttpServletResponse.SC_OK);

externalContext.setResponseContentType(content.getContentType());

                    byte[] buffer = new byte[2048];

                    int length;
                    InputStream inputStream = content.getStream();

                    while ((length = (inputStream.read(buffer))) >= 0) {

externalContext.getResponseOutputStream().write(buffer, 0, length);
                    }

                    externalContext.getResponseOutputStream().flush();
                    context.responseComplete();
                } else {
                    ExternalContext externalContext =
context.getExternalContext();

externalContext.setResponseStatus(HttpServletResponse.SC_NOT_FOUND);
                    externalContext.getResponseOutputStream().flush();
                    context.responseComplete();
                }
            } catch(Exception e) {
                logger.log(Level.SEVERE, "Error in streaming dynamic
resource.", e);
            } finally {
                session.remove(dynamicContentId);

                if(content != null) {
                    content.getStream().close();
                }
            }
        }
        else {
           super.handleResourceRequest(context);
        }
    }

}

This at least works for me, hope it can help you too.


2013/5/13 Thomas Andraschko <an...@gmail.com>

> Hi Kito,
>
> CC:
>
> ----------------------------------------------------------------------------------------------------------------
>     <composite:interface>
>         <composite:attribute name="pdfStream"
> type="org.primefaces.model.StreamedContent" required="true" />
>     </composite:interface>
>
>     <composite:implementation>
>         <p:media value="#{cc.attrs.pdfStream}" width="100%" height="600px"
> player="pdf"/>
>     </composite:implementation>
>
> ----------------------------------------------------------------------------------------------------------------
>
> View:
>
> ----------------------------------------------------------------------------------------------------------------
>     <cc:myCC pdfStream="#{reportController.report} />
>
> ----------------------------------------------------------------------------------------------------------------
>
> PF receives the Expression String via:
>
> ----------------------------------------------------------------------------------------------------------------
> media.getValueExpression("value").getExpressionString();
>
> ----------------------------------------------------------------------------------------------------------------
>
> If it should work inside a CC, we must receive "#{cc.attrs.pdfStream}"
> instead of "#{cc.attrs.pdfStream}".
>
> How can get the real expression here?
>
> Thanks,
> Thomas
>
>
> 2013/5/13 Kito Mann <ki...@virtua.com>
>
> > Hello Thomas,
> >
> > I think this is doable. Can you send us your composite component code?
> >
> > ___
> >
> > Kito D. Mann | @kito99 | Author, JSF in Action
> > Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and
> consulting
> > http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
> > @jsfcentral
> > +1 203-998-0403
> >
> > * JSF2 in Action Course - 6/17 - London:
> > http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> > * Listen to the Enterprise Java Newscast: *
> > http://blogs.jsfcentral.com/JSFNewscast/
> > *
> > * JSFCentral Interviews Podcast:
> > http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> > * Sign up for the JSFCentral Newsletter:
> > http://oi.vresp.com/?fid=ac048d0e17
> >
> >
> > On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> > andraschko.thomas@gmail.com> wrote:
> >
> > > Hi,
> > >
> > > is it possible unwrap a CC ValueExpresion?
> > > i found a bug with PrimeFaces p:media inside a composite component and
> i
> > > would like to fix it.
> > >
> > > If you pass the EL via a CC attr (e.g. #{myController.content}) and
> > attach
> > > it to p:media (e.g. #{cc.attrs.content}),
> > > p:media gets the ValueExpression and saves them in the session, to
> later
> > > stream the content in a resource request.
> > > Later the ResourceHandler evaluates it and tries to get the value of
> > > #{cc.attrs.content}, which can't work ofc.
> > >
> > > So is it possible to extract the "real" EL before store it in the
> > session?
> > > Is there a solution which also works in mojarra?
> > >
> > >
> > > Regards,
> > > Thomas
> > >
> >
>



-- 
<br/>
<br/>
Mit freundlichen Grüßen,<br/>
<hr/>
<b>Christian Beikov</b><br/>
Blazebit Design & Developing<br/>
<a href="http://www.blazebit.com">http://www.blazebit.com</a><br/>

Re: Unwrap CC ValueExpression?

Posted by Thomas Andraschko <an...@gmail.com>.
Hi Kito,

CC:
----------------------------------------------------------------------------------------------------------------
    <composite:interface>
        <composite:attribute name="pdfStream"
type="org.primefaces.model.StreamedContent" required="true" />
    </composite:interface>

    <composite:implementation>
        <p:media value="#{cc.attrs.pdfStream}" width="100%" height="600px"
player="pdf"/>
    </composite:implementation>
----------------------------------------------------------------------------------------------------------------

View:
----------------------------------------------------------------------------------------------------------------
    <cc:myCC pdfStream="#{reportController.report} />
----------------------------------------------------------------------------------------------------------------

PF receives the Expression String via:
----------------------------------------------------------------------------------------------------------------
media.getValueExpression("value").getExpressionString();
----------------------------------------------------------------------------------------------------------------

If it should work inside a CC, we must receive "#{cc.attrs.pdfStream}"
instead of "#{cc.attrs.pdfStream}".

How can get the real expression here?

Thanks,
Thomas


2013/5/13 Kito Mann <ki...@virtua.com>

> Hello Thomas,
>
> I think this is doable. Can you send us your composite component code?
>
> ___
>
> Kito D. Mann | @kito99 | Author, JSF in Action
> Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and consulting
> http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
> @jsfcentral
> +1 203-998-0403
>
> * JSF2 in Action Course - 6/17 - London:
> http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
> * Listen to the Enterprise Java Newscast: *
> http://blogs.jsfcentral.com/JSFNewscast/
> *
> * JSFCentral Interviews Podcast:
> http://www.jsfcentral.com/resources/jsfcentralpodcasts/
> * Sign up for the JSFCentral Newsletter:
> http://oi.vresp.com/?fid=ac048d0e17
>
>
> On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
> andraschko.thomas@gmail.com> wrote:
>
> > Hi,
> >
> > is it possible unwrap a CC ValueExpresion?
> > i found a bug with PrimeFaces p:media inside a composite component and i
> > would like to fix it.
> >
> > If you pass the EL via a CC attr (e.g. #{myController.content}) and
> attach
> > it to p:media (e.g. #{cc.attrs.content}),
> > p:media gets the ValueExpression and saves them in the session, to later
> > stream the content in a resource request.
> > Later the ResourceHandler evaluates it and tries to get the value of
> > #{cc.attrs.content}, which can't work ofc.
> >
> > So is it possible to extract the "real" EL before store it in the
> session?
> > Is there a solution which also works in mojarra?
> >
> >
> > Regards,
> > Thomas
> >
>

Re: Unwrap CC ValueExpression?

Posted by Kito Mann <ki...@virtua.com>.
Hello Thomas,

I think this is doable. Can you send us your composite component code?

___

Kito D. Mann | @kito99 | Author, JSF in Action
Virtua, Inc. | http://www.virtua.com | JSF/Java EE training and consulting
http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info |
@jsfcentral
+1 203-998-0403

* JSF2 in Action Course - 6/17 - London:
http://skillsmatter.com/course/home/jsf-and-ajax/ng-6708
* Listen to the Enterprise Java Newscast: *
http://blogs.jsfcentral.com/JSFNewscast/
*
* JSFCentral Interviews Podcast:
http://www.jsfcentral.com/resources/jsfcentralpodcasts/
* Sign up for the JSFCentral Newsletter: http://oi.vresp.com/?fid=ac048d0e17


On Mon, May 13, 2013 at 7:17 AM, Thomas Andraschko <
andraschko.thomas@gmail.com> wrote:

> Hi,
>
> is it possible unwrap a CC ValueExpresion?
> i found a bug with PrimeFaces p:media inside a composite component and i
> would like to fix it.
>
> If you pass the EL via a CC attr (e.g. #{myController.content}) and attach
> it to p:media (e.g. #{cc.attrs.content}),
> p:media gets the ValueExpression and saves them in the session, to later
> stream the content in a resource request.
> Later the ResourceHandler evaluates it and tries to get the value of
> #{cc.attrs.content}, which can't work ofc.
>
> So is it possible to extract the "real" EL before store it in the session?
> Is there a solution which also works in mojarra?
>
>
> Regards,
> Thomas
>