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EclipseLink/Development/JPA 2.0/query definition api
< EclipseLink | Development | JPA 2.0
Revision as of 12:55, 14 July 2009 by Gordon.yorke.oracle.com (Talk | contribs)
Contents
Query Definition API
JPA 2.0 Root | Enhancement Request
Issue Summary
JPA 2.0 specification has introduced a comprehensive object oriented query definition API which compliments JPQL.
This feature is covered in section 5 of the specification.
General Solution
Should be a simple translation to EclipseLink Queries and Expressions but will be work intensive. Some methods and interfaces can not be completed until the equivalent functionality has been added to EclipseLink
- - see Entity Type Expressions
- - see Collection Parameters for IN
- - see CASE Expressions
Work Required
- Develop model for testing
- approx 4 day
- Update Processing
- approx 13 days - creating query definition implementation.
Extensions
- QueryBuilder.rebuildFrom(Root)
- reformulates expression from new root. Usefull for reusing expressions on new queries
== Restrictions ++
- Selection and Where must have at least one matching root to form query, otherwise illegal argument results