[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-1814) DataModel wrapped data is set to null by ManagedEntityIdentityInterceptor
Matt Drees (JIRA)
jira-events at lists.jboss.org
Thu Sep 27 02:10:40 EDT 2007
[ http://jira.jboss.com/jira/browse/JBSEAM-1814?page=comments#action_12378935 ]
Matt Drees commented on JBSEAM-1814:
------------------------------------
By the way, I think nulling the wrappedData of any member DataModels in a conversational component hurts more than it helps. Sure, the wrapped data gets reset when you invoke a method on the owning component, but that means *only* the owning component can use it. If anyone asks the owning component for a reference to the member DataModel, they get an empty DataModel. This really defeats the purpose of a DataModel, as I see it.
Let me know if my comment is unclear.
> DataModel wrapped data is set to null by ManagedEntityIdentityInterceptor
> -------------------------------------------------------------------------
>
> Key: JBSEAM-1814
> URL: http://jira.jboss.com/jira/browse/JBSEAM-1814
> Project: JBoss Seam
> Issue Type: Bug
> Affects Versions: 2.0.0.BETA1
> Environment: seam cvs (20070816.1709)
> Reporter: Matt Drees
> Assigned To: Gavin King
> Priority: Minor
>
> The following test fails:
> @Name("dataModelComponent")
> @Scope(ScopeType.CONVERSATION)
> public class DataModelComponent extends EntityQuery {
> @Override
> public String getEjbql() {
> return "from java.lang.Object o";
> }
> }
> public class DataModelComponentTest extends SeamTest {
>
> @Test
> public void test() throws Exception {
> new FacesRequest() {
> @Override
> protected void renderResponse() throws Exception {
> DataModel model = (DataModel) getValue("#{dataModelComponent.dataModel}");
> assert model.getWrappedData() != null;
> }
> }.run();
> }
> }
> Because the component is conversation-scoped, a ManagedEntityIdentityInterceptor is attached, which nulls the wrapped List after getDataModel() is called.
> In the referenced forum, Gavin indicated he hadn't decided whether this should be expected behavior or not, and asked for a jira issue.
> If it is expected behavior (I hope not), I think either EntityQuery should not have a getDataModel() attribute, or it should be documented and/or programmatically enforced that EntityQuerys should not be conversation-scoped.
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