[eclipselink-dev] SVN main commit: Bug#211700 - batch fetching support u

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[eclipselink-dev] SVN main commit: Bug#211700 - batch fetching support using IN

From: James Sutherland <JAMES.SUTHERLAND@xxxxxxxxxx>
Date: Wed, 24 Mar 2010 07:28:36 -0700 (PDT)
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SVN main commit: Bug#211700 - batch fetching support using IN

https://bugs.eclipse.org/bugs/show_bug.cgi?id=211700

Code review: Andrei (pending)

Changes:

- Some cleanup, @Overrides, removed some dead code, some optimizations

- Switched to track batch queries in uow instead of objects.

- Fixed ObjectChangeSet compareTo to be consistent for nulls

- Added batch fetch IN support to mappings, refactored batch fetching in mappings to avoid duplicate code

- All mappings types that support batch fetching support IN

- IN currently requires singleton pk

- batch size is configurable, cursors are supported

- Added row tracking in BatchFetchPolicy for IN support

- Added JPA batch fetching tests

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