Hi Sven, Pedro,
Thanks both for your quick reply.
Ideally you would just set a Department instance into your Person objects
the best way is you have your depid property of type Department
This was the first approach to take into account, but the idea was discarded
in benefit of SimpleElementDTO, in order to provide only the necessary
information to Wicket Models, with the intention of not wasting any memory
on PageMaps due to Department object serializations... Also, this
SimpleElementDTO would be reusable throughout the whole application when
it's about Radio and DropDown Choices...
write some specialized render
>
This kinda 'dirty-fix' idea was already crawling in my mind, trying to come
out someway. Thanks for providing a concrete implementation.
So, in the end I'm trying to provide a custom model. Something like:
Java
------------------------
final Person p;
Model crModel = new Model(){
getObject(){
return p.getDeptId();
}
setObject(Object o){
// o is String!
p.setDeptId( (String) o);
}
};
ChoiceRenderer cr = new ChoiceRenderer("deptId", choices, new
ChoiceRenderer("id", "description"));
cr.setModel(crModel);
But i'm stucking into the same error, as this Model it's kind like a
PropertyModel which would be assumed by having the former
CompoundPropertyModel...
Any thoughts ? Maybe rendering labels independently ?
It's strange nobody has bumped into this situation before.. Maybe it's
because i'm still thinking like I was using Struts...
Thanks to both again,
Cheers !
2009/11/4 Pedro Santos <[email protected]>
> Hi Sven, he stell can write some specialized render... but I think the best
> way is you have your depid property of type Department. Than all this
> thread
> would not have started :)
>
> class YourCustomRender
> {
> @Override
> public String getIdValue(Object object, int index)
> {
> if (object instanceof DTO)
> {
> return ((DTO)object).getDeptId()
> }
> else
> {
> return (String)object;//already is the depid string
> }
> }
>
> @Override
> public Object getDisplayValue(Object object)
> {
> if (object instanceof DTO)
> {
> return ((DTO)object).getDescription();
> }
> else
> {
> return contextData.getDTOBasedOnDepid(object);
> }
> }
> }
>
> On Wed, Nov 4, 2009 at 1:29 PM, Xavier López <[email protected]> wrote:
>
> > Hi,
> >
> > I have a question regarding the use of RadioChoice and ChoiceRenderer's
> in
> > conjunction with CompoundPropertyModel. I'm new to Wicket (but already a
> > convinced user ;) ), so maybe my approach on this one is not at all as it
> > should be... Any comments are welcome !
> >
> > I'll get into details. Let's say I have a class in my domain model named
> > Person. This entity has a property named 'deptId' of type String. The
> > Person
> > entity is the backing for a CompundPropertyModel applied to the whole
> form.
> > The 'deptId' field is inputted by the user, let's say, by means of a
> > RadioChoice (I guess it makes no difference from a DropDownChoice taking
> > into account the point of the question). The choice list for the
> > RadioChoice
> > component is a List made up of DTO objects with properties "id" and
> > "description". To ensure proper rendering of labels, I use a suitable
> > ChoiceRenderer.
> >
> > Now, problems come when the 'deptId' property has a value in the Person
> > entity used in the CompoundPropertyModel. I get an error saying that
> class
> > String does not have any property called 'id' (I suppose this error comes
> > from having a ModelObject of type String and also having a ChoiceRenderer
> > refering to 'id' property).
> >
> > I'll provide some sample code:
> >
> > markup
> > -------------
> > ...
> > <form wicket:id="form">
> > ...
> > <span valign="top" wicket:id="deptId"></span>
> > ...
> > </form>
> > ...
> >
> > Java
> > -------------
> >
> > ...
> > List<SimpleElementDTO> choices = contextData.getChoices();
> > Person p = new Person(...);
> > Form f = new Form("form"){...};
> > f.setModel(new CompoundPropertyModel(p));
> > ChoiceRenderer cr = new ChoiceRenderer("deptId", choices, new
> > ChoiceRenderer("id", "description"));
> > f.add(cr);
> > ...
> >
> >
> > I suppose the 'normal' way of doing things would be providing a custom
> > Model
> > to 'cr', but I'd like to know if there is a possibility to achieve this
> > point still using CompoundPropertyModel...
> >
> > The stack trace I get is the following:
> >
> > WicketMessage: No get method defined for class: class java.lang.String
> > expression: id
> > Root cause:
> > org.apache.wicket.WicketRuntimeException: No get method defined for
> class:
> > class java.lang.String expression: id
> > at
> >
> >
> org.apache.wicket.util.lang.PropertyResolver.getGetAndSetter(PropertyResolver.java:440)
> > at
> >
> >
> org.apache.wicket.util.lang.PropertyResolver.getObjectAndGetSetter(PropertyResolver.java:282)
> > at
> >
> >
> org.apache.wicket.util.lang.PropertyResolver.getValue(PropertyResolver.java:91)
> > at
> >
> >
> org.apache.wicket.markup.html.form.ChoiceRenderer.getIdValue(ChoiceRenderer.java:140)
> > at
> >
> >
> org.apache.wicket.markup.html.form.AbstractSingleSelectChoice.getModelValue(AbstractSingleSelectChoice.java:144)
> > at
> >
> >
> org.apache.wicket.markup.html.form.FormComponent.getValue(FormComponent.java:797)
> > at
> >
> >
> org.apache.wicket.markup.html.form.RadioChoice.onComponentTagBody(RadioChoice.java:407)
> > at org.apache.wicket.Component.renderComponent(Component.java:2480)
> > at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1411)
> > at org.apache.wicket.Component.render(Component.java:2317)
> > at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1297)
> > ...
> >
>
>
>
> --
> Pedro Henrique Oliveira dos Santos
>
--
"To err is human; to make real mess, you need a computer."
