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Date: Tue, 22 Jan 2008 22:34:26 -0800
From: "Matthias Wessendorf" <matzew@apache.org>
Sender: mwessendorf@gmail.com
To: "MyFaces Discussion" <users@myfaces.apache.org>
Subject: Re: Registering a Converter for a "primitive Object"
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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.DoubleCo=
nverter</converter-class>
   </converter>

and

   <converter>
      <converter-for-class>java.lang.Double</converter-for-class>
      <converter-class>org.apache.myfaces.trinidadinternal.convert.DoubleCo=
nverter</converter-class>
   </converter>

-M
On Jan 22, 2008 10:25 AM, david delbecq <delbd+jakarta@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 =E9crit :
>
> >
> >
> > 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:
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
> > public Object getAsObject(FacesContext facesContext, UIComponent
> > uiComponent, String value) {
> >              FacesContext fc =3D FacesContext.getCurrentInstance();
> >        Locale l =3D fc.getViewRoot().getLocale();
> >              if (value !=3D null) {
> >            value =3D 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 =3D=3D null) {
> >            return "";
> >        }
> >        if (value instanceof String) {
> >            return (String) value;
> >        }
> >        try {
> >            FacesContext fc =3D FacesContext.getCurrentInstance();
> >            Locale l =3D 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");
> >        }
> >    }
> > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> >
> > 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?
> >
> >
> >
> >
> >
> >
> >
>
>



--=20
Matthias Wessendorf

further stuff:
blog: http://matthiaswessendorf.wordpress.com/
sessions: http://www.slideshare.net/mwessendorf
mail: matzew-at-apache-dot-org