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Posted to users@myfaces.apache.org by Alan Romaniuc <a....@gmail.com> on 2008/01/22 17:44:49 UTC
Registering a Converter for a "primitive Object"
Hi,
I can not set a converter for the type java.lang.Double. I would like to
do that once the we use comma to separate decimals (Using a locale based
converter)
I am using myfaces 1.2.1-snapshot from 17 december, but I tried with
others too.
I use something like that:
<converter>
<converter-id>iDoubleConverter</converter-id>
<converter-for-class>java.lang.Double</converter-for-class>
<converter-class>jsf.converter.InternationalDoubleConverter</converter-class>
</converter>
And my converter:
===============================
public Object getAsObject(FacesContext facesContext, UIComponent
uiComponent, String value) {
FacesContext fc = FacesContext.getCurrentInstance();
Locale l = fc.getViewRoot().getLocale();
if (value != null) {
value = value.trim();
if (value.length() > 0) {
try {
return
NumberFormat.getNumberInstance(l).parse(value).doubleValue();
} catch (ParseException ex) {
throw new ConverterException("Bad String " + value +
" " + l);
} catch (NumberFormatException e) {
throw new ConverterException("Format is not a Number
for locale" + l);
}
}
}
return null;
}
public String getAsString(FacesContext facesContext, UIComponent
uiComponent, Object value) {
if (value == null) {
return "";
}
if (value instanceof String) {
return (String) value;
}
try {
FacesContext fc = FacesContext.getCurrentInstance();
Locale l = fc.getViewRoot().getLocale();
log.debug("Converting Object" + value + " to " + l.toString());
return NumberFormat.getNumberInstance(l).format(value);
} catch (Exception e) {
throw new ConverterException("Format is not a Number");
}
}
============
If I use a converter in the component, it will work, showing that the
converter is working, but I woul like to register it to all Double objects.
Is this a bug from myfaces?
Re: Registering a Converter for a "primitive Object"
Posted by Matthias Wessendorf <ma...@apache.org>.
Trinidad is overriding the "primitive" converters as well.
here is what our built-in faces-cfg does for Double:
<converter>
<converter-id>javax.faces.Double</converter-id>
<converter-class>org.apache.myfaces.trinidadinternal.convert.DoubleConverter</converter-class>
</converter>
and
<converter>
<converter-for-class>java.lang.Double</converter-for-class>
<converter-class>org.apache.myfaces.trinidadinternal.convert.DoubleConverter</converter-class>
</converter>
-M
On Jan 22, 2008 10:25 AM, david delbecq <de...@oma.be> wrote:
> As per specifications:
>
> 3.3.3 Standard Converter Implementations
>
> JSF provides a set of standard Converter implementations. A JSF
> implementation must
> register the DateTime and Number converters by name with the
> Application instance
> for this web application, as described in the table below. This
> ensures that the converters are
> available for subsequent calls to Application.createConverter().
> Each concrete
> implementation class must define a static final String constant
> CONVERTER_ID whose value
> is the standard converter id under which this Converter is registered.
> The following converter id values must be registered to create
> instances of the specified
> Converter implementation classes:
> .....
> javax.faces.Double -- An instance of
> javax.faces.convert.DoubleConverter (or a subclass of this class).
>
>
>
> I recommend you change your converter declaration to match the
> specification rules. Note: i am not 100% sure it is overridable from
> default behaviour, but this part of section is hopefull:
>
> A JSF implementation must register converters for all of the
> following classes using the by-
> type registration mechanism:
> ...
> java.lang.Double, and java.lang.Double.TYPE -- An instance of
> javax.faces.convert.DoubleConverter (or a subclass of this class).
>
>
>
> Alan Romaniuc a écrit :
>
> >
> >
> > Hi,
> >
> > I can not set a converter for the type java.lang.Double. I would like
> > to do that once the we use comma to separate decimals (Using a locale
> > based converter)
> > I am using myfaces 1.2.1-snapshot from 17 december, but I tried with
> > others too.
> > I use something like that:
> > <converter>
> > <converter-id>iDoubleConverter</converter-id>
> > <converter-for-class>java.lang.Double</converter-for-class>
> >
> > <converter-class>jsf.converter.InternationalDoubleConverter</converter-class>
> >
> > </converter>
> >
> >
> > And my converter:
> > ===============================
> > public Object getAsObject(FacesContext facesContext, UIComponent
> > uiComponent, String value) {
> > FacesContext fc = FacesContext.getCurrentInstance();
> > Locale l = fc.getViewRoot().getLocale();
> > if (value != null) {
> > value = value.trim();
> > if (value.length() > 0) {
> > try {
> > return
> > NumberFormat.getNumberInstance(l).parse(value).doubleValue();
> > } catch (ParseException ex) {
> > throw new ConverterException("Bad String " + value
> > + " " + l);
> > } catch (NumberFormatException e) {
> > throw new ConverterException("Format is not a
> > Number for locale" + l);
> > }
> > }
> > }
> > return null;
> > }
> >
> > public String getAsString(FacesContext facesContext, UIComponent
> > uiComponent, Object value) {
> >
> > if (value == null) {
> > return "";
> > }
> > if (value instanceof String) {
> > return (String) value;
> > }
> > try {
> > FacesContext fc = FacesContext.getCurrentInstance();
> > Locale l = fc.getViewRoot().getLocale();
> > log.debug("Converting Object" + value + " to " +
> > l.toString());
> > return NumberFormat.getNumberInstance(l).format(value);
> > } catch (Exception e) {
> > throw new ConverterException("Format is not a Number");
> > }
> > }
> > ============
> >
> > If I use a converter in the component, it will work, showing that the
> > converter is working, but I woul like to register it to all Double
> > objects.
> >
> > Is this a bug from myfaces?
> >
> >
> >
> >
> >
> >
> >
>
>
--
Matthias Wessendorf
further stuff:
blog: http://matthiaswessendorf.wordpress.com/
sessions: http://www.slideshare.net/mwessendorf
mail: matzew-at-apache-dot-org
Re: Registering a Converter for a "primitive Object"
Posted by david delbecq <de...@oma.be>.
As per specifications:
3.3.3 Standard Converter Implementations
JSF provides a set of standard Converter implementations. A JSF
implementation must
register the DateTime and Number converters by name with the
Application instance
for this web application, as described in the table below. This
ensures that the converters are
available for subsequent calls to Application.createConverter().
Each concrete
implementation class must define a static final String constant
CONVERTER_ID whose value
is the standard converter id under which this Converter is registered.
The following converter id values must be registered to create
instances of the specified
Converter implementation classes:
.....
javax.faces.Double -- An instance of
javax.faces.convert.DoubleConverter (or a subclass of this class).
I recommend you change your converter declaration to match the
specification rules. Note: i am not 100% sure it is overridable from
default behaviour, but this part of section is hopefull:
A JSF implementation must register converters for all of the
following classes using the by-
type registration mechanism:
...
java.lang.Double, and java.lang.Double.TYPE -- An instance of
javax.faces.convert.DoubleConverter (or a subclass of this class).
Alan Romaniuc a écrit :
>
>
> Hi,
>
> I can not set a converter for the type java.lang.Double. I would like
> to do that once the we use comma to separate decimals (Using a locale
> based converter)
> I am using myfaces 1.2.1-snapshot from 17 december, but I tried with
> others too.
> I use something like that:
> <converter>
> <converter-id>iDoubleConverter</converter-id>
> <converter-for-class>java.lang.Double</converter-for-class>
>
> <converter-class>jsf.converter.InternationalDoubleConverter</converter-class>
>
> </converter>
>
>
> And my converter:
> ===============================
> public Object getAsObject(FacesContext facesContext, UIComponent
> uiComponent, String value) {
> FacesContext fc = FacesContext.getCurrentInstance();
> Locale l = fc.getViewRoot().getLocale();
> if (value != null) {
> value = value.trim();
> if (value.length() > 0) {
> try {
> return
> NumberFormat.getNumberInstance(l).parse(value).doubleValue();
> } catch (ParseException ex) {
> throw new ConverterException("Bad String " + value
> + " " + l);
> } catch (NumberFormatException e) {
> throw new ConverterException("Format is not a
> Number for locale" + l);
> }
> }
> }
> return null;
> }
>
> public String getAsString(FacesContext facesContext, UIComponent
> uiComponent, Object value) {
>
> if (value == null) {
> return "";
> }
> if (value instanceof String) {
> return (String) value;
> }
> try {
> FacesContext fc = FacesContext.getCurrentInstance();
> Locale l = fc.getViewRoot().getLocale();
> log.debug("Converting Object" + value + " to " +
> l.toString());
> return NumberFormat.getNumberInstance(l).format(value);
> } catch (Exception e) {
> throw new ConverterException("Format is not a Number");
> }
> }
> ============
>
> If I use a converter in the component, it will work, showing that the
> converter is working, but I woul like to register it to all Double
> objects.
>
> Is this a bug from myfaces?
>
>
>
>
>
>
>