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https://issues.apache.org/jira/browse/WICKET-1872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12642226#action_12642226
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Johan Compagner commented on WICKET-1872:
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that would mean that there is an extra new object with 2 references for every
behavior.
I know its an interface but if we did make setId(short)/getId() in the
interface and have that in our abstract behavior
then only who are making really custom behaviors have to follow that contract.
but the rest of the world doesnt really mind/care
> Url for behaviour and isTemporary flag of behaviour.
> ----------------------------------------------------
>
> Key: WICKET-1872
> URL: https://issues.apache.org/jira/browse/WICKET-1872
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.3.4
> Reporter: Stanislav Dvorscak
> Priority: Critical
>
> You add two behaviors to the Component. First behavior is temporary and the
> second is normal.
> Now the wicket creates the url by "urlFor(final Component component, final
> IBehavior behaviour, final RequestListenerInterface listener)" for second
> behavior with behaviourId=1. On the end of request the wicket removes the
> temporary behavior. Now the component contains only 1 but not 2 behaviors.
> And in the next request in method "public final void processEvents(final
> RequestCycle requestCycle)" the wicket tries to find the behavior by its id.
> But the problem is with if (component.getBehaviors().size() > idAsInt)
> condition, and with the fact that index of behavior is incorrect.
> The problematic classes with their methods:
> *org.apache.wicket.RequestCycle:*
> public final CharSequence urlFor(final Component component, final
> IBehavior behaviour,
> final RequestListenerInterface listener)
> {
> int index = component.getBehaviors().indexOf(behaviour);
> if (index == -1)
> {
> throw new IllegalArgumentException("Behavior " + this +
> " was not registered with this component: " +
> component.toString());
> }
> RequestParameters params = new RequestParameters();
> params.setBehaviorId(String.valueOf(index));
> ...
> ==============================================================================================
> *org.apache.wicket.request.target.component.listener.BehaviorRequestTarget*
> public final void processEvents(final RequestCycle requestCycle)
> {
> // Preprocess like standard component request. Do all the
> initialization
> // necessary
> onProcessEvents(requestCycle);
> // Get the IBehavior for the component based on the request
> parameters
> final Component component = getTarget();
> final String id = getRequestParameters().getBehaviorId();
> if (id == null)
> {
> throw new IllegalStateException(
> "Parameter behaviorId was not provided:
> unable to locate listener. Component: " +
> component.toString());
> }
> final int idAsInt = Integer.parseInt(id);
> IBehaviorListener behaviorListener = null;
> if (component.getBehaviors().size() > idAsInt)
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