Re: [eclipselink-users] enum access cast issue

[drrevis <renee@xxxxxxxxxxxxxxx>]

Hi James,

I keep hitting this problem in slightly different ways as I'm trying to use
the code and really need to figure out a way around it.  I know I should be
able to store a list of enums like this with JPA 2.0 so it seems like this
may be a bug.  Do you think I should just give up for now, store it as a
list of strings and convert to a list of enums on the fly using a transient
field?  Any other suggestions?

Renee



drrevis wrote:
> 
> Hi James,
> 
> The code where it works and where it fails is exactly the same.  The
> offending line (with associated logging) is from the predicate object:
> 
>     	logger.info("calling addAuxVerbs, index: " + verbFormIndex);
>     	logger.info("verbForm: " + verbForms.get(verbFormIndex));
>     	logger.info("class: " + verbForms.get(verbFormIndex).getClass());
>     	addAuxVerbs(sentence, sentencePredicate,
> verbForms.get(verbFormIndex));
>     	logger.info("no cast issues w/addAuxVerbs");
> 
> 
> And here is a portion of the predicate object definition:
> 
> public class Predicate implements Serializable {
> 
>     @Id
>     @GeneratedValue(strategy = GenerationType.TABLE, generator =
> "predicateIDGen")
>     private Long itemID;
>     private String name;
>     @ManyToOne
>     private SentenceGroup sentenceGroup;
>     private PredicatePattern pattern = PredicatePattern.CLAUSE_VI;
>     @OneToOne
>     private Verb verb1;
>     @OneToOne
>     private Verb verb2;
>     @ElementCollection
>     @Enumerated(EnumType.ORDINAL)
>     private List<VerbForm> verbForms;
> 
> etc. ......
> 
> 
> 
> 
> The logs that are generated in the successful case are:
> 
> -------------------
> [#|2010-05-04T11:28:13.463-0400|INFO|glassfishv3.0|com.leadingstep.grammardb.sentences|_ThreadID=35;_ThreadName=Thread-1;|calling
> addAuxVerbs, index: 0|#]
> 
> [#|2010-05-04T11:28:13.466-0400|INFO|glassfishv3.0|com.leadingstep.grammardb.sentences|_ThreadID=35;_ThreadName=Thread-1;|verbForm:
> ED|#]
> 
> [#|2010-05-04T11:28:13.466-0400|INFO|glassfishv3.0|com.leadingstep.grammardb.sentences|_ThreadID=35;_ThreadName=Thread-1;|class:
> class com.leadingstep.grammardb.verbs.VerbForm|#]
> 
> [#|2010-05-04T11:28:13.466-0400|INFO|glassfishv3.0|com.leadingstep.grammardb.sentences|_ThreadID=35;_ThreadName=Thread-1;|no
> cast issues w/addAuxVerbs|#]
> -------------------
> 
> 
> Then in the failed case, the logs are:
> 
> -------------------
> 
> [#|2010-05-04T11:31:03.626-0400|INFO|glassfishv3.0|com.leadingstep.grammardb.sentences|_ThreadID=35;_ThreadName=Thread-1;|calling
> addAuxVerbs, index: 0|#]
> 
> [#|2010-05-04T11:31:03.626-0400|INFO|glassfishv3.0|com.leadingstep.grammardb.sentences|_ThreadID=35;_ThreadName=Thread-1;|verbForm:
> ED|#]
> 
> [#|2010-05-04T11:31:03.626-0400|WARNING|glassfishv3.0|javax.enterprise.system.container.ejb.com.sun.ejb.containers|_ThreadID=35;_ThreadName=Thread-1;|A
> system exception occurred during an invocation on EJB GrammarDBBean method
> public java.util.List
> com.leadingstep.grammardb.beans.GrammarDBBean.fetchAllModifiedNounValues(com.leadingstep.grammardb.nouns.ModifiedNoun)
> javax.ejb.EJBException
>         at
> com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5070)
> 
> <snip>
> 
> Caused by: java.lang.ClassCastException: java.lang.String cannot be cast
> to com.leadingstep.grammardb.verbs.VerbForm
>         at
> com.leadingstep.grammardb.sentences.Predicate.fetchValue(Predicate.java:1061)
> 
> -------------------
> 
> 
> The particular predicate object that I'm accessing is the same in both the
> successful and failed cases and the verbForms list is not updated between
> the two accesses.  The logs show that the index it is using is the same in
> both cases and the value of the particular verbForm is the same, but when
> I try to access the class, I get the error.  (Note that when the logging
> stmt is removed, I get this same error at the addAuxVerbs line).
> 
> 
> I know that the system initially sees the verbForm list as being a list of
> VerbForm enums from this log:
> 
> [#|2010-05-04T11:19:56.388-0400|CONFIG|glassfishv3.0|org.eclipse.persistence.session.file:/Users/renee/Documents/workspace_LeadingStep/.metadata/.plugins/com.sun.enterprise.jst.server.sunappsrv92/domain1/eclipseApps/LS_Mgmt_App/GrammarElement_EJB_jar/_GrammarElement_EJB.ejb_or_metadata|_ThreadID=26;_ThreadName=Thread-1;|The
> target class (reference) class for the element collection mapping element
> [field verbForms] is being defaulted to: class
> com.leadingstep.grammardb.verbs.VerbForm.|#]
> 
> 
> I hope this is enough info to demonstrate the problem.  I'm happy to do
> whatever else I can to narrow down the underlying issue, but I just don't
> know what else to look at.
> 
> Renee
> 
> 
> 
> James Sutherland wrote:
>> 
>> I don't seem to be able to see you attachments.  Perhaps inline them, or
>> provide a link.
>> 
>> Also include the code for the classes where it works, and where it does
>> not.
>> 
>> 
> 
> 

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