javax.jdo.annotations

Annotation Type Discriminator

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

Annotation for the discriminator of the class. Corresponds to the xml element "discriminator" of the "inheritance" element.

Since:

2.1

Version:

2.1

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
String	column Name of the column for the discriminator
Column[]	columns The column(s) making up the discriminator.
String	customStrategy Custom strategy to use for the discriminator.
String	indexed Whether the discriminator is indexed.
DiscriminatorStrategy	strategy Strategy to use for the discriminator.
String	value The value for the discriminator for objects of this class when using "value-map" strategy.

Element Detail

strategy

public abstract DiscriminatorStrategy strategy

Strategy to use for the discriminator. The discriminator determines the class associated with a row in the datastore.

Returns:

the strategy to use for the discriminator

Default:

javax.jdo.annotations.DiscriminatorStrategy.UNSPECIFIED

customStrategy

public abstract String customStrategy

Custom strategy to use for the discriminator. If customStrategy is non-empty, then strategy must be UNSPECIFIED.

Returns:

the custom strategy

Default:

""

indexed

public abstract String indexed

Whether the discriminator is indexed.

Returns:

whether the discriminator is indexed

Default:

""

column

public abstract String column

Name of the column for the discriminator

Returns:

the name of the column for the discriminator

Default:

""

value

public abstract String value

The value for the discriminator for objects of this class when using "value-map" strategy.

Returns:

The value for the discriminator for objects of this class when using "value-map" strategy

Default:

""

columns

public abstract Column[] columns

The column(s) making up the discriminator.

Returns:

the column(s) making up the discriminator

Default:

{}