[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-4032) Vague exception when using a factory on a page-scoped component

Matthew Lieder (JIRA) jira-events at lists.jboss.org
Mon Mar 23 16:50:22 EDT 2009


Vague exception when using a factory on a page-scoped component
---------------------------------------------------------------

                 Key: JBSEAM-4032
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-4032
             Project: Seam
          Issue Type: Bug
          Components: Core
    Affects Versions: 2.1.1.GA
            Reporter: Matthew Lieder


The following code will cause an unhelpful NPE to be thrown by JSF when the factory is accessed:

@Name("someComponent")
@Scope(ScopeType.PAGE)
public class SomeComponent implements Serializable {

@Factory("someVar")
public String getSomeVar() {
return null;
}

}

While I believe I remember reading that using that particular type of factory method on a page-scoped component isn't supported (supported by the fact that removing the @Scope makes it work), the exception should at least be somewhat helpful in debugging the problem. NPE's with no messages are about as unfriendly as one can get.

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