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From "Jeffrey Blatttman (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-207) failure when composite ID w/ another composite ID as a field
Date Fri, 06 Apr 2007 20:58:32 GMT
failure when composite ID w/ another composite ID as a field 
-------------------------------------------------------------

                 Key: OPENJPA-207
                 URL: https://issues.apache.org/jira/browse/OPENJPA-207
             Project: OpenJPA
          Issue Type: Bug
    Affects Versions: 0.9.6
         Environment: derby
jdk 1.5.0_07
            Reporter: Jeffrey Blatttman
            Priority: Minor
         Attachments: book.zip

see attached test case: entities Library, Book, and Page. there is a one-many bidirectional
relationship between Library and Book, and Book and Page. a Library's ID is simply it's name.
a Book's ID is it's name, plus it's owning library's ID. A Page's ID is it's number, plus
it's owning Book's ID. 

this arrangement results in composite IDs for Book and Page. and moreover, Page's composite
ID, PageId, contains a page number field plus a BookId. however, this arrangement results
in an exception at runtime w/ the included test case ...

...
 Caused by: java.lang.ClassCastException: org.apache.openjpa.util.ObjectId
 at com.mycompany.book.Page.pcCopyKeyFieldsToObjectId(Page.java)
 at org.apache.openjpa.util.ApplicationIds.create(ApplicationIds.java:383)
 at org.apache.openjpa.kernel.BrokerImpl.persist(BrokerImpl.java:2349) 

note that if i remove the bookId field from PageId, the test case succeeds. 

also note that this problem is also observed against a trunk field from march 3 (0.9.7 snapshot).

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