yes we can't convert null to a primitive (int or boolean)
because what is null for an int? (0? but that is wrong, it is not 0 it is
void)
For a boolean we could say null is false. But that would then be an
exception to the rule.
So you need your own converter on the object that can handle null values for
a boolean.
johan
On 1/9/07, Erik van Oosten <[EMAIL PROTECTED]> wrote:
Yes, correct. The model should be cleared as well.
And it indeed uses setDefaultFormProcessing(false).
The approach your describing below will throw exceptions for checkboxes:
WicketMessage: unable to set object null, model:
Model:classname=[wicket.model.PropertyModel]:attached=true:nestedModel=[
[EMAIL PROTECTED]
]:expression=[searchInHistoricNames]:propertyType=[null],
called with component [MarkupContainer [Component id = formelement, page
= nl.amsterdam.rbrb.web.search.SearchPage, path =
2:maincontent:searchform:form:formElements:2:inputfragment:
formelement.CheckBox,
isVisible = true, isVersioned = false]]
Root cause:
wicket.util.convert.ConversionException: Can't convert null value to a
primitive class: boolean for setting it on
[EMAIL PROTECTED]
at
wicket.util.lang.PropertyResolver$MethodGetAndSet.setValue(
Ljava.lang.Object;Ljava.lang.Object;Lwicket.util.convert.IConverter;)V(
PropertyResolver.java:838)
at
wicket.util.lang.PropertyResolver$ObjectAndGetSetter.setValue(
Ljava.lang.Object;Lwicket.util.convert.IConverter;)V(PropertyResolver.java
:447)
at
wicket.util.lang.PropertyResolver.setValue(Ljava.lang.String
;Ljava.lang.Object;Ljava.lang.Object;Lwicket.util.convert.IConverter;)V(
PropertyResolver.java:136)
at
wicket.model.AbstractPropertyModel.onSetObject(Lwicket.Component
;Ljava.lang.Object;)V(AbstractPropertyModel.java:182)
at
wicket.model.AbstractDetachableModel.setObject(Lwicket.Component
;Ljava.lang.Object;)V(AbstractDetachableModel.java:131)
at
wicket.Component.setModelObject(Ljava.lang.Object;)Lwicket.Component;(
Component.java:2042)
at
wicket.markup.html.form.FormComponent.updateModel()V(FormComponent.java
:840)
at
nl.amsterdam.rbrb.web.form.FormPanel$5.component(Lwicket.Component
;)Ljava.lang.Object;(FormPanel.java:214)
<--- the line with formComponent.updateModel();
Regards,
Erik.
Johan Compagner wrote:
> why do you want to call updateFormComponentModels?
> You also want to clear all model data? So the models already did get
> some data from a previous request?
> (i take the reset button has setDefaultFormProcessing(false) ?)
>
> but why not do this:
>
> form.visitChildren(FormComponent.class, new
> Component.IVisitor() {
> public Object component(Component component) {
> ((FormComponent) component).clearInput();
> ((FormComponent) component).updateModel();
> return
> Component.IVisitor.CONTINUE
>
> _TRAVERSAL_BUT_DONT_GO_DEEPER;
> }
> });
>
>
> On 1/9/07, *Erik van Oosten* < [EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>> wrote:
>
> Hi,
>
> I am trying the make a reset button (clears all fields) with code
> below.
> According to the class comment of Form I can call
> updateFormComponentModels, however that method is not visible.
>
> What can I do to get the desired effect? I am using wicket-1.2.4.
>
> Regards,
> Erik.
>
>
> // The reset button
> Button resetButton = new Button("resetbutton") {
> /** [EMAIL PROTECTED] */
> protected void onSubmit() {
> // Clear the form
> form.visitChildren(FormComponent.class, new
> Component.IVisitor() {
> public Object component(Component component) {
> ((FormComponent) component).clearInput();
> return
> Component.IVisitor.CONTINUE_TRAVERSAL_BUT_DONT_GO_DEEPER;
> }
> });
> * form.updateFormComponentModels(); // <------
method
> not visible
> * }
> };
> // Perform only the onSubmit, no validation
> resetButton.setDefaultFormProcessing(false);
> form.add(resetButton);
>
>
>
> --
> Erik van Oosten
> http://www.day-to-day-stuff.blogspot.com/
>
>
>
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http://www.day-to-day-stuff.blogspot.com/
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