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From "Jeremy Bauer (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OPENJPA-1971) [GSoC 2011] Provide XML-based configuration for OpenJPA's custom metadata and mapping extensions
Date Thu, 31 Mar 2011 19:40:05 GMT
[GSoC 2011] Provide XML-based configuration for OpenJPA's custom metadata and mapping extensions
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                 Key: OPENJPA-1971
                 URL: https://issues.apache.org/jira/browse/OPENJPA-1971
             Project: OpenJPA
          Issue Type: New Feature
          Components: competitive, jpa, usability
    Affects Versions: 2.2.0
            Reporter: Jeremy Bauer


Context: The JPA specification includes many annotations for the specification of metadata
and mapping information within Java classes.  In addition, the spec provides a means to supply
the same information within XML configuration files (orm.xml).  One primary benefit of XML
config files is it allows modification of the ORM information without needing to recompile
the source code.

OpenJPA has many custom metadata and mapping annotations that can be used to provided functionality
beyond the JPA specification.  However, these extensions are available only through annotations.
 There is currently no means to specify the metadata or mapping extensions via XML.  We've
had several requests for this capability, but it hasn't seen much/any activity.
 
Task:

1) Understand OpenJPA's annotation extensions.
2) Determine which annotations make sense to provide in XML configuration
3) Design a schema for the XML-based configuration file (openjpa-orm.xml?)
4) Creating metadata and mapping parsers for the new XML mapping file
5) Wire the new parsers into the existing code path.
6) Provide adequate jUnit tests for the new function.

Mentor: techhusky at gmail dot com

Complexity: moderate

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