Seam 1.3.0.ALPHA UI example doubt
fernando_jmt Jun 15, 2007 9:59 PMI 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.