Re: [Springframework-rcp-dev] Binding byte array to JTextArea?

[Jan H. <jh...@sc...>]

That should be possible as well. 

Most bindings have a specific required type, in this case a String. If
you bind a property to such a binding, then it requests a valueModel
with a specific type on the formModel. If the source valueModel (meaning
the first one wrapping the property) has a different type it will ask
the conversion service for a suitable converter to create a converting
valueModel from the source type to the required type and vice versa. So
creating converters in both directions and registering them should do
the trick. Take a look at the DefaultConversionServiceFactoryBean for
more information. There are a few converters registered there that you
can take as a reference.

Kind Regards,
Jan


On Mon, 2008-01-28 at 23:22 +0200, Rogan Dawes wrote:
> Arne Limburg wrote:
> > Hi Rogan,
> > 
> > you need to extend AsYouTypeTextComponentAdapter and override 
> > adaptedValueChanged with something like this:
> >     protected void adaptedValueChanged(Object newValue) {
> >         super.adaptedValueChanged(((String)newValue).getBytes());
> >     }
> > 
> > You also have to reimplement TextComponentBinding to use your Adapter 
> > and to set the bytes, i.e. you have to change line 41 like this:
> >             textComponent.setText(new 
> > String((byte[])valueModel.getValue()));
> > 
> > and implement an appropriate Binder (take a look at TextAreaBinder).
> > <http://dict.leo.org/ende?lp=ende&p=eL4jU.&search=appropriate>Of course, 
> > if you need you have to handle encoding-specific conversions at the 
> > places above.
> > 
> > Regards,
> > 
> > Arne
> 
> I was looking at TextComponentBinding.java, and noted the Exception 
> handling:
> 
> protected JComponent doBindControl() {
>      final ValueModel valueModel = getValueModel();
>      try {
>          textComponent.setText((String) valueModel.getValue());
>      }
>      catch (ClassCastException e) {
>          IllegalArgumentException ex = new 
> IllegalArgumentException("Class cast exception converting '"
>                  + getProperty() + "' property value to string - did you 
> install a type converter?");
>          ex.initCause(e);
>          throw ex;
>      }
>      // TODO: implement ValueCommitPolicies
>      new AsYouTypeTextComponentAdapter(textComponent, valueModel);
>      return textComponent;
> }
> 
> Would it not be sufficient to make an appropriate type converter?
> 
> Rogan
> 
> > 
> > Rogan Dawes schrieb:
> >> Hi folks,
> >>
> >> I'd like to represent a byte[] field as a String in a JTextArea.
> >>
> >> Can anyone explain how to create such a Binder/Binding?
> >>
> >> Thanks
> >>
> >> Rogan
> >>
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