can't you check what exactly is being returned by template.getQuestions()
and if its a list what are the items in it
On Thu, Oct 23, 2008 at 10:10 AM, pieter claassen <[EMAIL PROTECTED]>wrote:
> Hi Dipu,
>
> I tried that but when I do the following:
>
> protected void populateItem(ListItem item) {
> System.out.println("+++++++" +
> item.getModelObject().getClass().getName());
> final QuestionAndAnswer qanda = (QuestionAndAnswer)
> item.getModelObject();
>
> I find that I now get the ClassCastException in the System.out.println
> line. It is clear as mud that the problem is that I am trying to force
> something into a list which is not a list?
>
> Regards,
> Pieter
>
>
>
> On Oct 23, 2008, at 10:59 AM, Dipu wrote:
>
> looks like template.getQuestions() is returning a list with items in it
>> which is not of the type QuestionAndAnswer
>>
>> try iterating through the list and logging the class name of each item in
>> it
>>
>> Dipu
>>
>>
>>
>> On Thu, Oct 23, 2008 at 9:46 AM, pieter claassen <[EMAIL PROTECTED]
>> >wrote:
>>
>> I am getting a classcast exception in ListView that is stumping me.
>>>
>>> This is the error message (top few lines)
>>>
>>> WicketMessage: Error attaching this container for rendering:
>>> [MarkupContainer [Component id = questioneditform]]
>>>
>>> Root cause:
>>>
>>> java.lang.ClassCastException: com.musmato.model.QuestionAndAnswer
>>> at
>>>
>>> org.apache.wicket.markup.html.list.ListItemModel.getObject(ListItemModel.java:55)
>>> at org.apache.wicket.Component.getModelObject(Component.java:1558)
>>> at
>>>
>>> com.musmato.wicket.pages.templates.TemplateEditPage$QuestionEditForm$1.populateItem(TemplateEditPage.java:93)
>>>
>>>
>>> This is the code that generates my ListItems:
>>>
>>> ListView questions = new ListView("questions",
>>> template
>>> .getQuestions()) {
>>>
>>>
>>> @Override
>>> protected void populateItem(ListItem item) {
>>> final QuestionAndAnswer qanda =
>>> (QuestionAndAnswer) item
>>> .getModelObject();
>>> setModel(new
>>> CompoundPropertyModel(qanda));
>>>
>>>
>>>
>>> I know for a fact that template.getQuestions() produces an ArrayList.
>>>
>>> The arraylist works when there is only 1 item in it but when I have more
>>> than 1 item, it fails with the ClassCastException. Is this a wicket
>>> problem
>>> or am I doing something wrong?
>>>
>>> Regards,
>>> Pieter
>>> pieter claassen
>>> [EMAIL PROTECTED]
>>>
>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: [EMAIL PROTECTED]
>>> For additional commands, e-mail: [EMAIL PROTECTED]
>>>
>>>
>>>
> pieter claassen
> [EMAIL PROTECTED]
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>
