org.eclipse.persistence.annotations

Annotation Type ExistenceChecking

@Target(value=TYPE)
@Retention(value=RUNTIME)
public @interface ExistenceChecking

The ExistenceChecking annotation is used to specify the type of checking EclipseLink should use when determining if an entity is new or existing. It is specifically used on a merge() operation to determine if only the cache should be used to determine if an object exists, or the object should be read (from the database or cache). By default the object is read. An existence-checking specification is supported on an Entity or MappedSuperclass annotation.

See Also:

org.eclipse.persistence.annotations.ExistenceType., DoesExistQuery

Author:

Guy Pelletier

Since:

Eclipselink 1.0

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
ExistenceType	value (Optional) Set the existence check for determining if an insert or update should occur for an object.

Element Detail

value

public abstract ExistenceType value

(Optional) Set the existence check for determining if an insert or update should occur for an object.

Default:

org.eclipse.persistence.annotations.ExistenceType.CHECK_CACHE