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https://issues.apache.org/jira/browse/MYFACES-1760?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12540546
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David Brainard commented on MYFACES-1760:
-----------------------------------------
When we change the value binding from a list to an array this problem does not
occur.ie in this value-expression "#{test_scope.targetPagePhysicals}" if
targetPagePhysicals is an array this problem wont occur.
I checked the impl. The problem is that when the selected values are
converted, the type of value binding is checked
valueType = vb.getType(facesContext);
and if it is an array the selected values are set in a array and if it is a
list it is set to an arraylist.
so when getSelectedValues() method is called it just resolves the value and
casts it to Object[] and we get the prob.
I have checked with the Sun RI. the prob is present there also.
I have checked the specs.this is wat it is stated in the specs.
"This property is a typesafe alias for the value property,so that the actual
state to be used can be acquired via a value expression."
I think we have to check the type of the value returned by value binding before
casting to Object[](Unless it has been implemented like that intentionally for
some reason).
pls comment if there is any prob.
> Using "getSelectedValues" of "UISelectMany" seems to be causing
> "ClassCastException"
> ------------------------------------------------------------------------------------
>
> Key: MYFACES-1760
> URL: https://issues.apache.org/jira/browse/MYFACES-1760
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 1.1.5
> Reporter: Guy Bashan
>
> It seems like calling getSelectedValues method of selectBooleanCheckbox
> causes exception.
> This is an example for a fregment of code:
> ---------------------------------------------------------
> <t:selectManyCheckbox
> value="#{test_scope.targetPagePhysicals}" layout="pageDirection"
> converter="PagePhysicalConverter" binding="#{test_scope.htmlSelect}">
> <f:selectItems
> value="#{test_scope.pagePhysicals}" />
> </t:selectManyCheckbox>
> <t:commandButton value="submitTargetPages"
> style="width:100px" immediate="true" onclick="submit()" forceId="true"
> actionListener="#{test_scope.targetPagesSelectedAction}" />
> In the bean:
> ----------------
> public void targetPagesSelectedAction(ActionEvent event)
> {
> Object[] xx = htmlSelect.getSelectedValues();
> FacesContext.getCurrentInstance().renderResponse();
> }
> Causes the following exception:
> -------------------------------------------
> javax.servlet.ServletException: Exception while invoking expression
> #{test_scope.targetPagesSelectedAction}
> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:154)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at org.ajaxanywhere.AAFilter.doFilter(AAFilter.java:46)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.shale.faces.ShaleApplicationFilter.doFilter(ShaleApplicationFilter.java:285)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> com.amadesa.admin.model.persistence.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:149)
> at
> com.amadesa.admin.model.persistence.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:56)
> 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:228)
> 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:104)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: javax.faces.el.EvaluationException: Exception while invoking
> expression #{test_scope.targetPagesSelectedAction}
> at
> org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:156)
> at javax.faces.component.UICommand.broadcast(UICommand.java:89)
> at
> javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:97)
> at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:139)
> at
> org.apache.myfaces.lifecycle.ApplyRequestValuesExecutor.execute(ApplyRequestValuesExecutor.java:32)
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:95)
> at
> org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:70)
> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:139)
> ... 25 more
> Caused by: java.lang.ClassCastException: java.util.ArrayList cannot be cast
> to [Ljava.lang.Object;
> at
> javax.faces.component.UISelectMany.getSelectedValues(UISelectMany.java:48)
> at
> com.amadesa.admin.view.bean.test.TestScopeBean.targetPagesSelectedAction(TestScopeBean.java:166)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:132)
> ... 32 more
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