[RE] Exception: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.List

Iae Galera,

 Estou com problema de Exception: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.List .  Não consigo resolver, alguém poderia me dar uma ideia do que acontece?

Código

    public String visualizar_criterios() {
        // Add event code here...
        int pasta = 0;
     
        CoreTable table = this.getTabela_resultado_pesquisa();

        //Obtain a list of all selected rows from the table
        RowKeySet keySet = table.getSelectedRowKeys();
        Iterator rowSetIter = keySet.iterator();

        FacesContext fctx = FacesContext.getCurrentInstance();
  
        ValueBinding vb = fctx.getApplication().createValueBinding("#{bindings}");

        DCBindingContainer bc = (DCBindingContainer)vb.getValue(fctx);
        DCIteratorBinding dcIter = (DCIteratorBinding)bc.get("Documento_pesquisa_avancadaView1Iterator");

        int contador = 0;

        while (rowSetIter.hasNext()) {
            //get the table row
            List l = (List)rowSetIter.next();
            Key key = (Key)l.get(0);

            dcIter.setCurrentRowWithKey(key.toStringFormat(true));
       
            //Obtain the Products object to delete
            RowImpl prRow = (RowImpl)dcIter.getCurrentRow();

            pasta += Integer.parseInt(prRow.getAttribute("IdPasta").toString());

            contador++;
        }
       
        return null;
    }

Erro

javax.faces.FacesException: #{backing_Documento_pesquisa_avancada.visualizar_criterios}: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.List at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190) at org.apache.myfaces.trinidad.component.UIXCollection.broadcast(UIXCollection.java:148) at org.apache.myfaces.trinidad.component.UIXTable.broadcast(UIXTable.java:279) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177) at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119) at java.security.AccessController.doPrivileged(Native Method) at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315) at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442) at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103) at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171) at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119) at java.security.AccessController.doPrivileged(Native Method) at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315) at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442) at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103) at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171) at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277) at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183) at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) at weblogic.work.ExecuteThread.run(ExecuteThread.java:178) Caused By: javax.faces.el.EvaluationException: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.List at org.apache.myfaces.trinidad.component.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:51) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190) at org.apache.myfaces.trinidad.component.UIXCollection.broadcast(UIXCollection.java:148) at org.apache.myfaces.trinidad.component.UIXTable.broadcast(UIXTable.java:279) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177) at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119) at java.security.AccessController.doPrivileged(Native Method) at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315) at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442) at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103) at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171) at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119) at java.security.AccessController.doPrivileged(Native Method) at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315) at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442) at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103) at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171) at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277) at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183) at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) at weblogic.work.ExecuteThread.run(ExecuteThread.java:178) Caused By: java.lang.ClassCastException: java.lang.String cannot be cast to java.util.List at oracle.view.backing.Documento_pesquisa_avancada.visualizar_criterios(Documento_pesquisa_avancada.java:1518) 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 com.sun.el.parser.AstValue.invoke(Unknown Source) at com.sun.el.MethodExpressionImpl.invoke(Unknown Source) at org.apache.myfaces.trinidad.component.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:46) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190) at org.apache.myfaces.trinidad.component.UIXCollection.broadcast(UIXCollection.java:148) at org.apache.myfaces.trinidad.component.UIXTable.broadcast(UIXTable.java:279) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:205) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:271) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:177) at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119) at java.security.AccessController.doPrivileged(Native Method) at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315) at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442) at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103) at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171) at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:119) at java.security.AccessController.doPrivileged(Native Method) at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315) at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:442) at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:103) at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:171) at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:139) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277) at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183) at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)

Tem certeza que cada elemento do Iterator rowSetIter é uma instância de List ou uma de suas implementações?

List l = (List)rowSetIter.next();

Então ele é um iten que estou selecionando de uma tabela do meu JSP, tive verificando se seria alguma coisa no código do JSP, mas não sei o q acontece.

 <tr:table value="#{bindings.Documento_pesquisa_avancadaView1.collectionModel}"
                      var="row" width="1130" rows="10"
                      selectionListener="#{bindings.Documento_pesquisa_avancadaView1.collectionModel.makeCurrent}"                   
                      rowSelection="multiple"
                      binding="#{backing_Documento_pesquisa_avancada.tabela_resultado_pesquisa}" >

Simples, ele não é uma instância List nem de qualquer de suas implementações.
Trata-se de uma String.

   Então [b]drsmachado[/b], estamos fazendo uma migração do nosso sistema, sobre a versão de nossa IDE que é JDeveloper 10g para 11g, na versão anterior funcionava bem, quando efetuamos a migração ele não funcionou mais, checou acusar esse problema de String. O que fiz, criei uma nova pagina e fiz alguns alterações e funcionou bem, mas mesmo assim adaptando essas alterações fica retornando essa incompatibilidade

Consegui descobrir o problema, no meu caso tive que alterar o XML da tabela. Trocando o TABLE por TREE e acrescentei uma notificação apontando a viu q estou setando.

Obrigado pela Ajuda

ANTES

<table id="Documento_pesquisa_avancadaView1" IterBinding="Documento_pesquisa_avancadaView1Iterator">

Depois

<tree IterBinding="Documento_pesquisa_avancadaView1Iterator" id="Documento_pesquisa_avancadaView1"> <nodeDefinition DefName="oracle.JDataModel.Documento_pesquisa_avancadaView" Name="Documento_pesquisa_avancadaView10">