javax.jdo.annotations

Annotation Type ForeignKey

@Target(value={TYPE,FIELD,METHOD})
@Retention(value=RUNTIME)
public @interface ForeignKey

Annotation for a database foreign-key. Corresponds to the xml element "foreign-key".

Since:

2.1

Version:

2.1

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
Column[]	columns Columns that compose this foreign key.
String	deferred Whether this foreign key is deferred (constraint is checked only at commit).
ForeignKeyAction	deleteAction The delete action of this foreign key.
Extension[]	extensions Vendor extensions.
String[]	members Member (field and property) names that compose this foreign key.
String	name Name of the foreign key.
String	table Table for the foreign key.
String	unique Whether this foreign key is unique.
ForeignKeyAction	updateAction The update action of this foreign key.

Element Detail

name

public abstract String name

Name of the foreign key.

Returns:

the name of the foreign key

Default:

""

table

public abstract String table

Table for the foreign key. This is needed iff annotating a type where the foreign key is not defined on the primary table for the type.

Returns:

the table on which the foreign key is defined

Default:

""

deferred

public abstract String deferred

Whether this foreign key is deferred (constraint is checked only at commit).

Returns:

whether this foreign key is deferred

Default:

""

unique

public abstract String unique

Whether this foreign key is unique.

Returns:

whether this foreign key is unique

Default:

""

deleteAction

public abstract ForeignKeyAction deleteAction

The delete action of this foreign key.

Returns:

the delete action of this foreign key

Default:

javax.jdo.annotations.ForeignKeyAction.RESTRICT

updateAction

public abstract ForeignKeyAction updateAction

The update action of this foreign key.

Returns:

the update action of this foreign key

Default:

javax.jdo.annotations.ForeignKeyAction.RESTRICT

members

public abstract String[] members

Member (field and property) names that compose this foreign key.

Returns:

the member names that compose this foreign key

Default:

{}

columns

public abstract Column[] columns

Columns that compose this foreign key.

Returns:

the columns that compose this foreign key

Default:

{}

extensions

public abstract Extension[] extensions

Vendor extensions.

Returns:

the vendor extensions

Default:

{}