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