javax.faces.el.EvaluationException: More than one method mat
fernando_jmt Apr 29, 2007 10:20 PMHi.
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)