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From "Kevin Sutter (JIRA)" <>
Subject [jira] [Updated] (OPENJPA-1011) Instantiate meta-model classes for JPA 2.0 from XML descriptors
Date Thu, 21 Jul 2011 16:03:58 GMT


Kevin Sutter updated OPENJPA-1011:

      Priority: Critical  (was: Major)
    Issue Type: Improvement  (was: New Feature)

Since I'm not ready to call this a "bug", I changed this from a "new feature" to an "improvement"...
 Sound any better?  :-)  And, I raised the Priority.  We'll see if we can get any takers...

> Instantiate meta-model classes for JPA 2.0 from XML descriptors
> ---------------------------------------------------------------
>                 Key: OPENJPA-1011
>                 URL:
>             Project: OpenJPA
>          Issue Type: Improvement
>    Affects Versions: 2.0.0
>            Reporter: Pinaki Poddar
>            Assignee: Pinaki Poddar
>            Priority: Critical
>             Fix For: 2.2.0
>   Original Estimate: 672h
>  Remaining Estimate: 672h
> JPA 2.0 has introduced a specification for strictly-typed dynamic query construction.
The type-strictness is based on availability of a meta-model. The user application can either
use meta-model API to access the type information or instantiate the meta-model (referred
as canonical meta-model) with a set of auto-generated classes for compile-time binding. This
issue refers to instantiating the canonical meta-model at compile-time.
> The process involves processing source code annotations or xml descriptors.
> Annotation processing support in Java platform has significantly changed across JDK version
5 and 6. In JDK5, the annotation processing was supported by a command-line tool named apt
based on com.sun.mirror API library. In JDK 6, the annotation processing is more seamlessly
integrated with javac compilation process with javax.annotation API libraries.
> It is not obvious at this point on how to hook into compiler life-cycle when source code
has *no* annotation and persistence meta-data is *only* available in XML descriptors.

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