[jboss-user] [JBoss Seam] - Reflections uses wrong argument causing IllegalArgumentExcep

[boevink]

Hi,

I'm trying to use an abstract class for some stateful beans that use a lot of similair functionality.
But I'm having a lot of trouble using in-/outjections in combination with reflection.

My abstract class:


  | package common.selectableMap;
  | 
  | //imports....
  |  
  | @Scope(ScopeType.CONVERSATION)
  | public abstract class AbstractMap
  | {
  | 
  |     @Logger protected Log log;
  |     @In FacesMessages facesMessages;
  |     @In(create=true) protected Map<String, String> messages;
  |     @PersistenceContext (type=PersistenceContextType.EXTENDED)
  |     private EntityManager em;
  | 
  |     protected EntityQuery resultList;
  |     protected Map<Serializable, Boolean> checkedEntities; 
  |     
  |     @Destroy @Remove                                                                      
  |     public abstract void destroy();
  |     
  |     @Begin(join=true)
  |     public void begin()
  |     {
  |     	log.info("abstractMap begin: " + getClass().getName());
  |     	if (checkedEntities == null)
  |     	{
  |     		checkedEntities = new HashMap<Serializable, Boolean>();
  |     	}
  |     }
  | }
  | 
  | 
The 'resultList' and 'checkedEntities' attributes are reflected by the subclass and will be in-/outjected by the subclass.

My subclass:

  | package common.selectableMap;
  | 
  | // imports....
  | 
  | @Stateful
  | @Name("userMap")
  | public class UserMap extends AbstractMap implements MapManager
  | {
  | 
  |     @Override
  |     @Destroy @Remove           
  |     public void destroy() {
  |     }
  | 
  |     @Out (scope=ScopeType.CONVERSATION, value="checkUsers")
  |     public Map<Serializable, Boolean> getCheckedEntities() {
  |         return checkedEntities;
  |     }
  | 
  |     public void setCheckedEntities(Map<Serializable, Boolean> checkedEntities) {
  |         this.checkedEntities = checkedEntities;
  |     }
  | 
  |     @In (required=false, value="resultList", scope=ScopeType.CONVERSATION)
  |     public EntityQuery getResultList() {
  |         return resultList;
  |     }
  | 
  |     public void setResultList(Object resultList) {
  |     } 
  | }
  | 
  | 

This however causes an exception when using them:

  | Caused by: java.lang.IllegalArgumentException: Could not invoke method by reflection: UserMap.getResultList() with parameters: (null) on: nl.wkm.orionglobe.web.entity.common.selectableMap.UserMap
  | 	at org.jboss.seam.util.Reflections.invoke(Reflections.java:31)
  | 	at org.jboss.seam.Component.setPropertyValue(Component.java:1765)
  | 	... 119 more
  | Caused by: java.lang.IllegalArgumentException: wrong number of arguments
  | 	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:585)
  | 	at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
  | 	... 120 more
  | 

Why does the UserMap.getResultList() get called with a 'null' parameter?
(It realy is, as I've checked while debugging)

It should not use a parameter at all!

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