Specifying Read Only Settings

Use the Read Only check-box on the mapping's General tab (see Figure 5-2) to set a mapping to be read only. TopLink will not consider attributes associated with read-only mappings during update and delete operations.

Because these operations are not actually performed for the mapping, any processes dependent on these operations (such as custom SQL or descriptor events) are not called for read-only. The attributes are still used for read operations.

Note: The primary key mappings must not be read-only.

Mappings defined for the write-lock or class indicator field must be read-only, unless the write-lock is configured not to be stored in the cache and the class indicator is part of the primary key.