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Difference between revisions of "EclipseLink/Development/JPA 2.0/query definition api"
< EclipseLink | Development | JPA 2.0
(New page: = Query Definition API = JPA 2.0 Root | [http://bugs.eclipse.org/249218 Enhancement Request] ==Issue Summary== JPA 2.0 specification has introduced ...) |
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==Issue Summary== | ==Issue Summary== | ||
JPA 2.0 specification has introduced a comprehensive object oriented query definition API which compliments JPQL. | JPA 2.0 specification has introduced a comprehensive object oriented query definition API which compliments JPQL. | ||
| − | This | + | |
| + | This feature is covered in section 5 of the specification. | ||
==General Solution== | ==General Solution== | ||
| − | Should be a simple translation to EclipseLink Queries and Expressions | + | 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 [[EclipseLink/Development/JPA_2.0/entity_type_expressions | Entity Type Expressions]] | ||
| + | : - see [[EclipseLink/Development/JPA_2.0/collection_parameters_for_in|Collection Parameters for IN]] | ||
| + | : - see [[EclipseLink/Development/JPA_2.0/case_expressions|CASE Expressions]] | ||
==Work Required== | ==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 | ||
Latest revision as of 12:56, 14 July 2009
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