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https://issues.apache.org/jira/browse/WICKET-4105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119687#comment-13119687
]
Andrea Del Bene commented on WICKET-4105:
-----------------------------------------
Thee problem was introduced with commit 916364, when cast to WebRequest was
introduced inside method 'beforeRender(Component component)'. I've reverted
methods 'beforeRender(Component component)' and 'afterRender(final Component
component)' to commit 895520 and this solves issue.
See attached patch.
PS: patch passes all unit tests.
> Using ajax to update a component that has an AbstractTransformerBehavior
> attached throws a ClassCastException
> -------------------------------------------------------------------------------------------------------------
>
> Key: WICKET-4105
> URL: https://issues.apache.org/jira/browse/WICKET-4105
> Project: Wicket
> Issue Type: Bug
> Reporter: Andrea Del Bene
> Attachments: myproject.zip
>
>
> Using ajax to update a component that has an AbstractTransformerBehavior
> attached throws a ClassCastException:
> java.lang.ClassCastException:
> org.apache.wicket.ajax.AjaxRequestTarget$AjaxResponse cannot be cast
> to org.apache.wicket.request.http.WebResponse
> at
> org.apache.wicket.markup.transformer.AbstractTransformerBehavior.beforeRender(AbstractTransformerBehavior.java:68)
> at
> org.apache.wicket.Component.notifyBehaviorsComponentBeforeRender(Component.java:3421)
> at org.apache.wicket.Component.internalRender(Component.java:2344)
> at org.apache.wicket.Component.render(Component.java:2273)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1474)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1638)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1613)
> at
> org.apache.wicket.MarkupContainer.onComponentTagBody(MarkupContainer.java:1567)
> at
> org.apache.wicket.markup.html.form.Form.onComponentTagBody(Form.java:1570)
> at
> org.apache.wicket.markup.html.panel.DefaultMarkupSourcingStrategy.onComponentTagBody(DefaultMarkupSourcingStrategy.java:72)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2515)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1576)
> at org.apache.wicket.Component.internalRender(Component.java:2345)
> at org.apache.wicket.Component.render(Component.java:2273)
> at
> org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1474)
> at
> org.apache.wicket.MarkupContainer.renderAll(MarkupContainer.java:1638)
> at
> org.apache.wicket.MarkupContainer.renderComponentTagBody(MarkupContainer.java:1613)
> at
> org.apache.wicket.MarkupContainer.renderAssociatedMarkup(MarkupContainer.java:735)
> at
> org.apache.wicket.markup.html.panel.AssociatedMarkupSourcingStrategy.renderAssociatedMarkup(AssociatedMarkupSourcingStrategy.java:76)
> at
> org.apache.wicket.markup.html.panel.PanelMarkupSourcingStrategy.onComponentTagBody(PanelMarkupSourcingStrategy.java:112)
> at
> org.apache.wicket.Component.internalRenderComponent(Component.java:2515)
> at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1576)
> at org.apache.wicket.Component.internalRender(Component.java:2345)
> at org.apache.wicket.Component.render(Component.java:2273)
> at
> org.apache.wicket.ajax.AjaxRequestTarget.respondComponent(AjaxRequestTarget.java:982)
> at
> org.apache.wicket.ajax.AjaxRequestTarget.respondComponents(AjaxRequestTarget.java:796)
> at
> org.apache.wicket.ajax.AjaxRequestTarget.constructResponseBody(AjaxRequestTarget.java:676)
> at
> org.apache.wicket.ajax.AjaxRequestTarget.respond(AjaxRequestTarget.java:637)
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:712)
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:63)
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:96)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:208)
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:251)
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:162)
> at
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:218)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Thread.java:619)
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