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From Craig L Russell <Craig.Russ...@Sun.COM>
Subject Post processing in JPA
Date Thu, 19 Apr 2007 15:52:34 GMT
Hi Jacek,

On Apr 19, 2007, at 7:56 AM, Jacek Laskowski wrote:

>> I thought I needed to add the class names to persistence.xml to  
>> have them
>> post-processed.
> What do you mean by "post-processed". There's no notion of
> "post-processing" in JPA.

Post processing is a common term used to describe anything done to  
a .class file after being generated by the compiler. And there  
certainly is the notion of post processing class files in JPA.

In a container, the JPA provider is given the chance to post process  
entities by an explicit callback. See section 7.1.

Outside the container, JPA providers typically use the java agent  
technology to perform post processing on the classes.

Some JPA providers have a static post processor that allows you to  
deploy applications without using agents or transformers at runtime.  
OpenJPA's processor is the PCEnhancer.


Craig Russell
Architect, Sun Java Enterprise System
408 276-5638
P.S. A good JDO? O, Gasp!

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