1 Reply Latest reply on May 1, 2007 12:11 PM by Fernando Montaño

    javax.faces.el.EvaluationException: More than one method mat

    Fernando Montaño Expert

      Hi.

      I run into one problem when I use overridden methods in a class that extends from a parameterized class. If I declare in the superclass one method, then I override such method in the specific type subclass, and then I use this method as an action, I get this exception:

      javax.faces.el.EvaluationException: More than one method matched #{userAction.select(userItem)}. Method name or number of p
      arams must be unique.
      



      Here is my code:
      Super class:
      public class UserActionT<T> implements Serializable {
      
       @In
       private EntityManager entityManager;
      
       private T entity;
      
      
       @Begin(ifOutcome = "Success")
       public String select(T selectedUser) {
       try {
       setInstance(entityManager.find(getEntityClass(), getId(selectedUser)));
       return "Success";
       } catch (EntityNotFoundException e) {
       return "Fail";
       }
       }
      
       public void setInstance(T instance) {
       entity = instance;
       }
      
       public T getInstance(){
       return entity;
       }
       protected Class<T> getEntityClass() {
       return (Class<T>) getInstance().getClass();
       }
       private Object getId(Object instance) {
       Object id = null;
       if (instance.getClass().isAnnotationPresent(Entity.class)) {
       for (Field field : instance.getClass().getDeclaredFields()) {
       if (field.isAnnotationPresent(Id.class)) {
       try {
       field.setAccessible(true);
       id = field.get(instance);
       } catch (IllegalAccessException e) {
       throw new IllegalArgumentException("The object instance must have an @Id field");
       }
      
       }
       }
       } else {
       throw new IllegalArgumentException("The object instance must be an annotated @Entity class");
       }
       return id;
       }
       @End
       public String cancel() {
       return "Success";
       }
      
      


      Sub class:
      @Name("userAction")
      @Scope(ScopeType.CONVERSATION)
      @Restrict("#{s:hasRole('admin')}")
      public class UserActionExtended extends UserActionT<User> {
      
       @In(required = false)
       @Out(required = false)
       private User user;
      
      
      
       @Override
       @Begin(ifOutcome = "Success")
       public String select(User selectedUser) {
       return super.select(selectedUser);
       }
      
      
       @Override
       @End
       public String cancel() {
       return "userList";
       }
      
      
       @Override
       public void setInstance(User instance) {
       user = instance;
       }
      
       @Override
       public User getInstance() {
       return user;
       }
      }
      


      .xhtml
      //inside a column of a dataTable which var name is userItem
      <s:link value="#{messages['Common.view']}" action="#{userAction.select(userItem)}"/>
      


      pages.xml
      <page view-id="/user/list.xhtml">
       <restrict>#{s:hasRole('admin')}</restrict>
       <end-conversation/>
       <navigation from-action="#{userAction.select(userItem)}">
       <rule if-outcome="Success">
       <redirect view-id="/user/edit.xhtml"/>
       </rule>
       <rule if-outcome="Fail">
       <redirect view-id="/user/list.xhtml"/>
       </rule>
       </navigation>
       </page>
      
      


      I was having similar problems related to javassist (duplicated method exception), but I solved this updating the thirdparty-all.jar with the javassit 3.4, and these exceptions disappear.

      At this time the problem seems somtehing related to EL expressions, but I don't know what exactly is.

      Maybe someone has some workaround for this problem, or even better knows how can I make this work.

      Any help is highly appreciated.


      Thanks in advance.


      Finally:
      My environment:

      Seam 1.2.1.GA
      ajax4jsf 1.1.1
      richfaces 3.0.1
      Tomcat 5.5.17


      The exception stacktrace is:

      21:50:17,992 ERROR [SeamPhaseListener] uncaught exception
      javax.faces.el.EvaluationException: More than one method matched #{userAction.select(userItem)}. Method name or number of p
      arams must be unique.
       at org.jboss.seam.actionparam.ActionParamBindingHelper.findParamTypes(ActionParamBindingHelper.java:104)
       at org.jboss.seam.actionparam.ActionParamBindingHelper.invokeTheExpression(ActionParamBindingHelper.java:55)
       at org.jboss.seam.actionparam.ActionParamMethodBinding.invoke(ActionParamMethodBinding.java:75)
       at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:148)
       at org.jboss.seam.core.Pages.callAction(Pages.java:499)
       at org.jboss.seam.core.Pages.enterPage(Pages.java:282)
       at org.jboss.seam.jsf.AbstractSeamPhaseListener.enterPage(AbstractSeamPhaseListener.java:265)
       at org.jboss.seam.jsf.AbstractSeamPhaseListener.beforeRender(AbstractSeamPhaseListener.java:203)
       at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:57)
       at org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersBefore(PhaseListenerManager.java:73)
       at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:126)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:126)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:248)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
       at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
       at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
       at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
       at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:66
      4)
       at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
       at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
       at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
       at java.lang.Thread.run(Thread.java:595)
      21:50:18,008 ERROR [DebugPageHandler] redirecting to debug page
      javax.faces.el.EvaluationException: More than one method matched #{userAction.select(userItem)}. Method name or number of p
      arams must be unique.
       at org.jboss.seam.actionparam.ActionParamBindingHelper.findParamTypes(ActionParamBindingHelper.java:104)
       at org.jboss.seam.actionparam.ActionParamBindingHelper.invokeTheExpression(ActionParamBindingHelper.java:55)
       at org.jboss.seam.actionparam.ActionParamMethodBinding.invoke(ActionParamMethodBinding.java:75)
       at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:148)
       at org.jboss.seam.core.Pages.callAction(Pages.java:499)
       at org.jboss.seam.core.Pages.enterPage(Pages.java:282)
       at org.jboss.seam.jsf.AbstractSeamPhaseListener.enterPage(AbstractSeamPhaseListener.java:265)
       at org.jboss.seam.jsf.AbstractSeamPhaseListener.beforeRender(AbstractSeamPhaseListener.java:203)
       at org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:57)
       at org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersBefore(PhaseListenerManager.java:73)
       at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:126)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:126)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:248)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
       at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:60)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
       at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
       at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
       at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:66
      4)
       at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
       at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
       at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
       at java.lang.Thread.run(Thread.java:595)