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From "Rick McGuire (JIRA)" <j...@apache.org>
Subject [jira] Created: (OPENJPA-1778) Improved error information for unenhanced classes.
Date Tue, 31 Aug 2010 12:44:52 GMT
Improved error information for unenhanced classes. 
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                 Key: OPENJPA-1778
                 URL: https://issues.apache.org/jira/browse/OPENJPA-1778
             Project: OpenJPA
          Issue Type: Bug
          Components: jpa
    Affects Versions: 2.0.0
            Reporter: Rick McGuire
            Priority: Minor


The exception message issued by openjpa 2.0 for the use of an unenhanced class is not as useful
as the message issued by the 1.x versions.  In 2.0, the following message is received:  

<openjpa-2.0.0-r422266:935683 nonfatal user error> org.apache.openjpa.persistence.ArgumentException:
Attempt to cast instance "org.apache.sample.entities.Book@97781f" to PersistenceCapable failed.
Ensure that it has been enhanced.
FailedObject: org.apache.sample.entities.Book@97781f

While the same application run using openjpa 1.x gives this message:  

<openjpa-1.2.1-r752877:753278 fatal user error> org.apache.openjpa.persistence.ArgumentException:
No metadata was found for type "class org.apache.sample.entities.Book". The class does not
appear in the list of persistent types: [org.apache.geronimo.sample.entities.Book].

The 2.0 message no longer points to the persistence.xml definition as the potential source
of error.  It should give some possible solutions to "Ensure that is has been enhanced". 
Perhaps something like "Ensure that the class is included in the list of persistent types
or enhanced as part of the application build".  

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