CompoundPropertyModel works different in wicket-7.x and master

[Tobias Soloschenko]

Hi guys,

Martin mentioned to me that my last integration breaks the build of Wicket-7.x.

As I saw master compiled fine. After a short research we found out that the 
CompoundPropertyModel works slightly different.

Output in wicket-7.x:

<img wicket:id="compoundImage" 
src="Model:classname=[org.apache.wicket.model.PropertyModel]:nestedModel=[Model:classname=[org.apache.wicket.model.CompoundPropertyModel]:nestedModel=[org.apache.wicket.markup.html.image.ExternalImageTestPage$ImageSrc@7cdbc5d3]]:expression=[url]"/>

Output in master:

<img wicket:id="compoundImage" src="http://www.google.de/test.jpg"/>

Invokation:

        ImageSrc imageSrc = new ImageSrc();
        imageSrc.setUrl("http://www.google.de/test.jpg";);
        CompoundPropertyModel<ImageSrc> compoundPropertyModel = new 
CompoundPropertyModel<ImageSrc>(imageSrc);
        add(new 
ExternalImage("compoundImage",compoundPropertyModel.bind("url")));

Code to receive the model object. String.valueOf(model.getObject());

I don't know what changed, but maybe you know.

kind regards

Tobias