Working with CMP Direct Mappings

Use CMP direct mappings to define how a persistent CMP EJBs refer to objects without descriptors, such as the JDK classes and primitives.

You can create the following CMP direct mappings the TopLink Mapping editor:

Direct-to-field mappings - Map a Java attribute directly to a database field (see "Creating Direct-to-Field Mappings" ).
Type conversion mappings - Map Java values with simple type conversions, such as from character to string (see "Creating Type Conversion Mappings" ).
Object type mappings - Use an association to map values to the database (see "Creating Object Type Mappings" ).
Serialized object mappings - Map serializable objects, such as multimedia objects, to database BLOB fields (see "Creating Serialized Object Mappings" ).

Refer to "Working with Direct Mappings" for more information on understanding direct mappings