Hi all
I'm trying to use CheckGroup, but encounter some problems. First, my code:
class NameValueListView<T extends ParameterValueProvider<?>> extends
ListView<T> {
<U> void displayItem(ListItem<T> listItem, ParameterValueProvider<U>
parameter) {
...
List<U> enumItems = new ArrayList<U>(parameter.getEnumCodes());
addMultiSelectPanelListItem(listItem, enumItems, labelModel, new
PropertyModel<Collection<U>>(parameter,
"valueList"), parameter);
}
<U> void addMultiSelectPanelListItem(ListItem<T> listItem,
List<U> enumItems, IModel<String> labelModel,
IModel<Collection<U>> model,
final ParameterValueProvider<U> parameter) {
CheckGroup<U> comp = new CheckGroup<U>("value");
comp.setType(parameter.getType());
comp.setRequired(!parameter.isOptional());
comp.setLabel(labelModel);
ListView<U> enumListView = new ListView<U>("values", enumItems) {
@Override
protected void populateItem(ListItem<U> item) {
item.add(new Check<U>("check", item.getModel()));
item.add(new Label("value",
item.getDefaultModelObjectAsString()));
}
};
enumListView.setReuseItems(true);
comp.add(enumListView);
// Add panel
MultiCheckBoxPanel<U> panelMCB = new
MultiCheckBoxPanel<U>(COMPONENT_ID, comp);
listItem.add(panelMCB);
}
}
ParameterValueProvider has the mehtods {get,set}Value[List].
The html looks like this:
<html xmlns:wicket>
<wicket:panel>
<span wicket:id="value">
<span wicket:id="values">
<input type="checkbox" wicket:id="check" />
<span wicket:id="value"></span>
<br/>
</span>
</span>
</wicket:panel>
</html>
So far, so good. Values are getting displayed and the correct check
boxes are selected. However, when submitting the form, I get an exception:
---------------------------------------------------
WicketMessage: Method onFormSubmitted of interface
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at
component [MarkupContainer [Component id = cardDetailForm]] threw an
exception
Root cause:
java.lang.ClassCastException: java.lang.String
at
org.apache.wicket.markup.html.form.CheckGroup.updateModel(CheckGroup.java:171)
at
org.apache.wicket.markup.html.form.Form$FormModelUpdateVisitor.component(Form.java:225)
at
org.apache.wicket.markup.html.form.FormComponent.visitComponentsPostOrderHelper(FormComponent.java:514)
at
org.apache.wicket.markup.html.form.FormComponent.visitComponentsPostOrderHelper(FormComponent.java:493)
at
org.apache.wicket.markup.html.form.FormComponent.visitComponentsPostOrderHelper(FormComponent.java:493)
at
org.apache.wicket.markup.html.form.FormComponent.visitComponentsPostOrderHelper(FormComponent.java:493)
at
org.apache.wicket.markup.html.form.FormComponent.visitComponentsPostOrderHelper(FormComponent.java:493)
at
org.apache.wicket.markup.html.form.FormComponent.visitComponentsPostOrder(FormComponent.java:465)
at
org.apache.wicket.markup.html.form.Form.internalUpdateFormComponentModels(Form.java:2051)
at
org.apache.wicket.markup.html.form.Form.updateFormComponentModels(Form.java:2019)
at org.apache.wicket.markup.html.form.Form.process(Form.java:984)
at org.apache.wicket.markup.html.form.Form.process(Form.java:911)
at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:876)
at java.lang.reflect.Method.invoke(Unknown Source)
at
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:182)
at
org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1241)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1320)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1419)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:456)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:289)
at
org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:334)
at
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:286)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1807)
at
org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:525)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1757)
at org.mortbay.http.HttpServer.service(HttpServer.java:879)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:789)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:960)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:806)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:218)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:331)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:520)
Complete stack:
org.apache.wicket.WicketRuntimeException: Method onFormSubmitted of
interface org.apache.wicket.markup.html.form.IFormSubmitListener
targeted at component [MarkupContainer [Component id = cardDetailForm]]
threw an exception
at
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:193)
at
org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1241)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1320)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1419)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:456)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:182)
at
org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
at
org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
at
org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1241)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1320)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1419)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:456)
---------------------------------------------------
I then looked at the wicket-examples and saw that CheckGroup was
initialized without a model. This won't work for me, but I tried it
anyway. The only result is:
---------------------------------------------------
"WicketMessage: CheckGroup [41:cardDetailForm:rows:11:panel:value]
contains a null model object, must be an object of type
java.util.Collection"
---------------------------------------------------
I didn't see any other major differences between the example and my code
(uh, okay, except some type parameters and stuff, but well...).
So. Any ideas?
-- chris
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
