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From Marc Prud'hommeaux <>
Subject Re: JPQLExpressionBuilder uses wrong classloader
Date Tue, 02 Jan 2007 21:06:02 GMT

I assume you are specifying the ClassLoader by using your own  
subclass of PersistenceUnitInfoImpl. OpenJPA should be using your  
ClassLoader, although if the same class name is available in both  
your classloader as well as the system classloader, then I think the  
results are undefined.

Is it possible to check to see if your ClassLoader is used if the  
class to be loaded is *not* available in the system classloader?

On Dec 27, 2006, at 8:38 PM, Dain Sundstrom wrote:

> Also it appears that the Broker be loading classes from the thread  
> context class loader when persist is called.
> -dain
> On Dec 27, 2006, at 5:34 PM, Dain Sundstrom wrote:
>> I've been working on a getting JPA runtime enhancement and have  
>> run into a problem where OpenJPA is loading my classes from the  
>> wrong class loader.  When I create a persistence unit info it  
>> supplies a specific class loader for OpenJPA to use when resolving  
>> application classes.  When I execute a query the  
>> JPQLExpressionBuilder simply uses getClass().getClassLoader() to  
>> load classes.  In my case this is the system class loader which  
>> contains unenhanced classes and not the class loader for the  
>> persistence unit which has properly enhanced classes.
>> It is my understand that OpenJPA should use the class loader  
>> obtained from the PersistenceUnitInfo for all class loading.  Is  
>> this correct?
>> If that is correct, is this a bug in OpenJPA?
>> -dain

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