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 (@(protected)).

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.

View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4054937#4054937

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