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Dali Project/specs/3.0/2.0ElementCollection
Contents
- 1 Functional Specification: Dali Support for JPA 2.0 Element Collection mapping
- 1.1 Document History
- 1.2 Project overview
- 1.3 Concepts
- 1.4 Requirements / Functionality
- 1.4.1 Element Collection with Basic Type
- 1.4.2 Element Collection with Embeddable Type
- 1.4.3 Element Collection Map Basic Key and Basic Value
- 1.4.4 Element Collection Map Embeddable Key and Embeddable value
- 1.4.5 Element Collection Map Embeddable Key and Basic value
- 1.4.6 Element Collection Map Basic Key and Embeddable Value
- 1.4.7 Element Collection Map Entity Key and Basic Value
- 1.4.8 Element Collection Map Entity Key and Embeddable Value
- 1.5 API
- 1.6 Issues
- 1.7 Future Considerations
Functional Specification: Dali Support for JPA 2.0 Element Collection mapping
bug 258490 - element collection support
Document History
Date | Author | Version Description & Notes |
---|---|---|
12-9-2009 | Karen Butzke | Draft |
Project overview
This feature covers the element collection mapping in the JPA 2.0 spec as well as any EclipseLink extensions.
Goals:
- Add Generic 2.0 support for Element Collection
- Add EclipseLink 3.0 support for Element Collection with relevant extensions
- Provide the appropriate defaults and validation for these settings
Concepts
Present any concepts relevant to the feature.
EclipseLink Element Collection Functional Spec
Requirements / Functionality
Element Collection with Basic Type
- target-class - defaults to type of the Collection if generic, must be specified otherwise
- fetch - defaults to Lazy
- collection-table and @CollectionTable
- name defaults to <Entity name>_<attribute name>
- column and @Column
- name default to attribute name
- table defaults to collection table name and is not editable
- @Temporal, @Enumerated, @Lob, @Convert (EclipseLink)
Element Collection Basic Type Details
Ordering Section
Element Collection with Embeddable Type
- target-class - defaults to type of the Collection if generic, must be specified otherwise
- fetch - defaults to Lazy
- collection-table and @CollectionTable
- name defaults to <Entity name>_<attribute name>
- Attribute and Association override names are derived from the Embeddable type
Element Collection Embeddable Type Details
Element Collection Map Basic Key and Basic Value
- target-class - defaults to type of the Map value if generic, must be specified otherwise
- map-key-class and @MapKeyClass - defaults to the type of the Map key if generic, must be specified otherwise and if MapKey is not
- map-key and @MapKey - this and MapKeyClass are mutually exclusive
- fetch - defaults to Lazy
- collection-table and @Collection Table
- Name defaults to <Entity name>_<attribute name>
- Value column definition
- column and @Column
- temporal @Temporal, enumerated @Enumberated, lob @Lob, convert @Convert (EclipseLink)
- Key column definition
- map-key-column and @MapKeyColumn
- map-key-temporal and @MapKeyTemporal
- map-key-enumerated and @MapKeyEnumerated
- map-key-convert and @MapKeyConvert
- Validation errors:
- MapKey and MapKeyClass are both specified
Element Collection Map with Basic Key and Basic Value Details
Element Collection Map Embeddable Key and Embeddable value
- target-class - defaults to type of the Map value if generic, must be specified otherwise
- fetch - defaults to Lazy
- collection-table and @Collection Table
- Name defaults to <Entity name>_<attribute name>
- map-key-class and @MapKeyClass - defaults to the type of the Map key if generic, must be specified otherwise and if MapKey is not
- map-key and @MapKey - this and MapKeyClass are mutually exclusive
- Value overrides
- In Xml attribute-override, in Java @AttributeOverride
- In Xml association-override, in Java @AssociationOverride
- Key overrides
- In Xml use map-key-attribute-override and map-key-association-override
- In Java use AttributeOverride(name="key.<name>") and AttributeOverride(name="value.<name>)
Element Collection Map Embeddable Key and Basic value
- target-class - defaults to type of the Map value if generic, must be specified otherwise
- fetch - defaults to Lazy
- collection-table and @Collection Table
- Name defaults to <Entity name>_<attribute name>
- map-key-class and @MapKeyClass - defaults to the type of the Map key if generic, must be specified otherwise and if MapKey is not
- map-key and @MapKey - this and MapKeyClass are mutually exclusive
- Value column definition
- column and @Column
- temporal @Temporal, enumerated @Enumberated, lob @Lob, convert @Convert (EclipseLink)
- Key overrides
- In Xml use map-key-attribute-override and map-key-association-override
- In Java use AttributeOverride(name="key.<name>") and AttributeOverride(name="value.<name>)
Screen shot is similar to others with the Map Value section having column and type and the Map Key section having overrides
Element Collection Map Basic Key and Embeddable Value
- target-class - defaults to type of the Map value if generic, must be specified otherwise
- map-key-class and @MapKeyClass - defaults to the type of the Map key if generic, must be specified otherwise and if MapKey is not
- map-key and @MapKey - this and MapKeyClass are mutually exclusive
- fetch - defaults to Lazy
- collection-table and @Collection Table
- Name defaults to <Entity name>_<attribute name>
- Value overrides
- In Xml attribute-override, in Java @AttributeOverride
- In Xml association-override, in Java @AssociationOverride
- Key column definition
- map-key-column and @MapKeyColumn
- map-key-temporal and @MapKeyTemporal
- map-key-enumerated and @MapKeyEnumerated
- map-key-convert and @MapKeyConvert
- Validation errors:
- MapKey and MapKeyClass are both specified
Screen shot is similar to others with the Map Value section having overrides and the Map Key having column and type
Element Collection Map Entity Key and Basic Value
- target-class - defaults to type of the Map value if generic, must be specified otherwise
- fetch - defaults to Lazy
- collection-table and @Collection Table
- Name defaults to <Entity name>_<attribute name>
- map-key-class and @MapKeyClass - defaults to the type of the Map key if generic, must be specified otherwise and if MapKey is not
- map-key and @MapKey - this and MapKeyClass are mutually exclusive
- Value column definition
- column and @Column
- temporal @Temporal, enumerated @Enumberated, lob @Lob, convert @Convert (EclipseLink)
- Key column definition
- map-key-join-column and @MapKeyJoinColumn
- @MapKeyJoinColumns
Element Collection Map Entity Key and Embeddable Value
- target-class - defaults to type of the Map value if generic, must be specified otherwise
- fetch - defaults to Lazy
- collection-table and @Collection Table
- Name defaults to <Entity name>_<attribute name>
- map-key-class and @MapKeyClass - defaults to the type of the Map key if generic, must be specified otherwise and if MapKey is not
- map-key and @MapKey - this and MapKeyClass are mutually exclusive
- Value overrides
- In Xml attribute-override, in Java @AttributeOverride
- In Xml association-override, in Java @AssociationOverride
- Key column definition
- map-key-join-column and @MapKeyJoinColumn
- @MapKeyJoinColumns
Screen shot is similar to others with the 'Map Value' section having overrides and the 'Map Key' section having join columns
API
Issues
This section lists the open issues that are still pending that must be decided prior to fully implementing this project's requirements.
Issue # | Owner | Description / Notes | Decision |
---|---|---|---|
Future Considerations
During the research for this project the following items were identified as out of scope but are captured here as potential future enhancements. If agreed upon during the review process these should be logged in the bug system.