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Oracle® Application Server TopLink Mapping Workbench User's Guide
10g Release 2 (10.1.2) Part No. B15900-01 |
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Oracle® Application Server TopLink Mapping Workbench User's Guide
10g Release 2 (10.1.2) Part No. B15900-01 |
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In Oracle Application Server TopLink, direct mappings define how a persistent object refers to objects without descriptors, such as the JDK classes and primitives.
You can create the following direct mappings in OracleAS TopLink:
Direct-to-field mappings – Map a Java attribute directly to a database field (see "Working with Direct-to-Field Mappings").
Type conversion mappings – Map Java values with simple type conversions, such as from character to string (see "Working with Type Conversion Mappings").
Object type mappings – Use an association to map values to the database (see "Working with Object Type Mappings").
Serialized object mappings – Map serializable objects, such as multimedia objects, to database BLOB fields (see "Working with Serialized Object Mappings").
Transformation mappings – Allow you to create custom mappings where one or more fields can be used to create the object be stored in the attribute (see "Working with Transformation Mappings").
