Re: Re: Custom DataScroller (t:dataScroller)

[Klaus SCHUSTER <sc...@racon-linz.at>]

Hi!

Can you explain with some code snippets?
I do nothing see in the getUIData().getValue.

thanks,
Klaus

>Stupid me. Why didn't I call getValue() before :).
>
>This works fine:
>ListDataModel listDataModel =
>(ListDataModel)scroller.getUIData().getValue();
>ArrayList dataList = (ArrayList)listDataModel.getWrappedData();
>
>Mission accomplished.
>
>Thanks a ton again.
>
>Tathagat
>
>On 2/8/08, Martin Marinschek <[EMAIL PROTECTED]> wrote:
>
> Hi Tathagat,
>
> <h:dataTable value="#{bean.dataModel}"/>
>
> Bean
>
> {
>    public DataModel getDataModel();
> }
>
> Like this, you can wrap the corresponding list in a DataModel and do
> more than just extract data - DataModel is a powerful interface. As
> for concrete implementations, DataModel can be of type ListDataModel,
> e.g. Is this what you want? I still don't understand what you mean by
> getting the data - the data is in the value, so you can call
> getValue() on the component, and this is not protected. Do you need
> anything more?
>
> regards,
>
> Martin
>
> On Feb 7, 2008 4:59 PM, Tathagat <[EMAIL PROTECTED]> wrote:
> > Hi again Martin.
> >
> > I want to access the data from my custom dataScroller Renderer Class.
> > public class MaeHtmlDataScrollerRenderer extends
> HtmlDataScrollerRenderer
> >
> > This means even if I use the binding property for dataTable, I am 
stuck.
> > Cause of the protected methods I cannot get the data out.
> >
> > What do you mean by set the value to a data-model? As in a new 
property
> to
> > the custom dataScroller?
> >
> > Thanks again
> > Tathagat
> >
> >
> >
> > On 2/7/08, Martin Marinschek <[EMAIL PROTECTED]> wrote:
> > > Hi Tathagat,
> > >
> > > you could bind the <h:dataTable/> with the binding attribute to a
> > > backing-bean - or you could set the value to a data-model, then you
> > > have access to the full data-model.
> > >
> > > regards,
> > >
> > > Martin
> > >
> > > On 2/7/08, Tathagat <[EMAIL PROTECTED]> wrote:
> > > > Hi Martin.
> > > > Let me re-word my question.
> > > >
> > > > I need all the data associated with a dataTable in my java code to
> do
> > some
> > > > stuff with it. If you somehow get hold of this dataTable object -
> it's
> > not
> > > > possible to get data out of it as all such methods are protected.
> > > > BUT a dataScroller has a method - getUIData() - which gives the 
data
> on
> > the
> > > > "active" page.
> > > > So if I associate a dummy scroller with our dataTable (also dummy 
-
> copy
> > of
> > > > original with rows=all data) (but hide it) having just 1 page, I
> have
> > access
> > > > to all data in dataTable (indirectly using dataScroller). This is
> the
> > hack I
> > > > was talking about.
> > > >
> > > > Is it clearer?
> > > >
> > > > I wanna know if there is a better way to get all data associated
> with
> > the
> > > > table on java level?
> > > >
> > > > Why I wanna do this - or where am I headed - to get a custom
> scroller.
> > > >
> > > > Current data scroller gives a paginator in the following format:
> > > > 1-100, 101-200, 201-300.. and so on.
> > > >
> > > > What I would like is value of a column (along which the table is
> > sorted),
> > > > for example:
> > > > AAA-CAT, CAU-FAX, FBC-MPC... and so on.
> > > > The advantage is that user sees immediately where the value lies 
in
> the
> > > > paginator (and does not have to guess).
> > > >
> > > > To do this.. I need all the data in the dataTable on java level.
> > > >
> > > > Hope I was clearer????
> > > >
> > > > Thanks for your time.
> > > > Tathagat
> > > >
> > > >
> > > > On 2/6/08, Martin Marinschek <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > Hi Tathagat,
> > > > >
> > > > > I am very sorry, but I do not understand where you are heading.
> Why
> > should
> > > > > the second scroller have all data then? I really don't get your
> > > > explanation.
> > > > >
> > > > > regards,
> > > > >
> > > > > Martin
> > > > >
> > > > > On Feb 1, 2008 4:18 PM, Tathagat <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > > Hi All.
> > > > > > Current data scroller gives a paginator in the following 
format:
> > > > > > 1-100, 101-200, 201-300.. and so on.
> > > > > >
> > > > > > What I would like is value of a column (along which the table 
is
> > > > > > sorted), for example:
> > > > > > AAA-CAT, CAU-FAX, FBC-MPC... and so on.
> > > > > > The advantage is that user sees immediately where the value 
lies
> in
> > the
> > > > > > paginator (and does not have to guess).
> > > > > >
> > > > > > I implemented my own solution for it.
> > > > > > Extended t:dataScroller classes with my own (regsitering
> > faces-config,
> > > > > > new taglib, entry in web.xml).
> > > > > > I had to override the following method in
> > > > > > 
org.apache.myfaces.custom.datascroller.HtmlDataScrollerRenderer
> > > > > > protected HtmlCommandLink getLink(FacesContext facesContext,
> > > > > > HtmlDataScroller scroller,
> > > > > >             String text, int pageIndex)
> > > > > >
> > > > > > Now the problem here was to get the data of the table 
mentioned
> in
> > "for"
> > > > > > property of datascroller.
> > > > > > By default dataScroller has only "rows" (property of
> t:dataTable)
> > amount
> > > > > > of data (which is currently visible to user).
> > > > > > --scroller.getUIData()
> > > > > >
> > > > > > So I used the following hack.
> > > > > > Define the same scroller and table with different IDs with
> > rows=total
> > > > > > number of rows and style=display:none;
> > > > > > Causing it not to show on the page but having the second 
sroller
> all
> > the
> > > > > > data in it.
> > > > > >
> > > > > > Thus I could build a paginator as mentioned above.
> > > > > >
> > > > > > My questions is:
> > > > > > Is there a better way to get all the data in the table? All
> methods
> > > > > > which provide data are protected.
> > > > > >
> > > > > > Thanks for your time.
> > > > > > Tathagat
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > >
> > > > > http://www.irian.at
> > > > >
> > > > > Your JSF powerhouse -
> > > > > JSF Consulting, Development and
> > > > > Courses in English and German
> > > > >
> > > > > Professional Support for Apache MyFaces
> > > >
> > >
> > >
> > > --
> > >
> > > http://www.irian.at
> > >
> > > Your JSF powerhouse -
> > > JSF Consulting, Development and
> > > Courses in English and German
> > >
> > > Professional Support for Apache MyFaces
> > >
> >
> >
>
>
>
> --
>
> http://www.irian.at
>
> Your JSF powerhouse -
> JSF Consulting, Development and
> Courses in English and German
>
> Professional Support for Apache MyFaces
>




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