[jboss-user] [JBoss Seam] - Seam 1.3.0.ALPHA UI example doubt

[fernando_jmt]

I lost a lot of time trying to find out the reason for the problem I described here:
http://www.jboss.com/index.html?module=bb&op=viewtopic&t=110611
(Problem of UnsupportedOperationException when using @ManyToMany and <s:convertEntity/>)

I tried a lot of things (debug, simplify my code, with EJB, with POJO) but I did not found the reason. 
Well I do the following in order to show you the problem, and maybe you can tell me what is happening:

a) I have got Seam 1.3.0.ALPHA

b) I check UI example has the right enviroment  I want to test (@ManyToMany between Person and Colour).

c) I deployed it to Jboss 4.2.0.GA  and all work fine. Note that s:selectItems sample uses Seam Framework.

d) I made a POJO action component in the UI example, it looks like:

  | @Name("personAction")
  | @Scope(ScopeType.CONVERSATION)
  | public class PersonAction {
  | 
  |     @In(create=true)
  |     private EntityManager entityManager;
  | 
  |     private Person person;
  | 
  |     private Integer id;
  | 
  | 
  |     @Transactional
  |     public String update() {
  |         entityManager.joinTransaction();
  |         entityManager.merge(person);
  |         entityManager.flush();
  |         return "Success";
  |     }
  | 
  |     public Person getInstance() {
  |         if (person != null) {
  |             return person;
  |         } else {
  |             entityManager.joinTransaction();
  |             person = entityManager.find(Person.class, id);
  |             return person;
  |         }
  |     }
  | 
  |     public Integer getId() {
  |         return id;
  |     }
  | 
  |     public void setId(Integer id) {
  |         this.id = id;
  |     }
  | 
  | }
  | 


e) I created a selectItemsAction.xhtml based on selectItems.xhtml, it looks like:


  | <h:form>	 
  | 				
  | 		<s:decorate template="decorateField.xhtml">
  | 			<ui:define name="label">Favourite Colours</ui:define>
  | 			<ui:define name="description">A colour is an entity</ui:define>
  | 			<h:selectManyListbox value="#{personAction.instance.favouriteColours}" >
  | 				<s:selectItems value="#{colours.resultList}" var="colour" label="#{colour.name}" />
  | 				<s:convertEntity />
  | 			</h:selectManyListbox>
  | 		</s:decorate>
  | 		
  | 		<h:commandButton value="Apply" action="#{personAction.update}">
  | 			<s:conversationPropagation type="join" />
  | 		</h:commandButton>
  | 		
  | 		<h:messages globalOnly="true" />
  | 		<p><s:link view="/index.xhtml" propagation="end">Back to index</s:link></p>
  | 	</h:form>
  | 
  | 


f) Minor changes:
pages.xml

  | <page view-id="/selectItemsAction.xhtml">
  | 		<begin-conversation join="true"/>
  | 		<param name="personId" converterId="javax.faces.Integer" value="#{personAction.id}" />
  | 	</page>
  | 

template.xhtml (link to start the update process, exactly like selectItems):

  | <li><s:link view="/selectItemsAction.xhtml" propagation="join">
  | 			<code>s:selectItems POJO Action</code>
  | 			<f:param name="personId" value="1" />
  | 		</s:link></li>
  | 

g) I just deploy again and trying selectItemsAction.xhtml it does not work, it gives UnsupportedOperationException (stacktrace is in the post I put at the beginning of this post) .



Now, my question is why POJO action which I added to UI example does not work?

What am I doing wrong?

As I tell you before, this also does not work using EJB(my case), and this only happens with Seam 1.3.0.ALPHA, because it works fine in Seam 1.2.1.   And as I tell above, it works with Seam Framework.


Please help me, at this time I don't know how to solve this.


Thanks in advance.

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