Notice: This Wiki is now read only and edits are no longer possible. Please see: https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/wikis/Wiki-shutdown-plan for the plan.
Difference between revisions of "EclipseLink/Development/JPA 2.0/query definition api"
< EclipseLink | Development | JPA 2.0
(→Extensions) |
|||
| (4 intermediate revisions by the same user not shown) | |||
| Line 5: | Line 5: | ||
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 feature is covered in section 5 of the specification. | ||
==General Solution== | ==General Solution== | ||
| Line 10: | Line 11: | ||
Should be a simple translation to EclipseLink Queries and Expressions but will be work intensive. | 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 | 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/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/collection_parameters_for_in|Collection Parameters for IN]] | ||
: - see [[EclipseLink/Development/JPA_2.0/case_expressions|CASE Expressions]] | : - see [[EclipseLink/Development/JPA_2.0/case_expressions|CASE Expressions]] | ||
| Line 19: | Line 20: | ||
# Update Processing | # Update Processing | ||
#: approx 13 days - creating query definition implementation. | #: 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