/*
* Copyright (c) 2008, 2009, 2011 Oracle, Inc. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution. The Eclipse Public License is available
* at http://www.eclipse.org/legal/epl-v10.html and the Eclipse Distribution License
* is available at http://www.eclipse.org/org/documents/edl-v10.php.
*/
package javax.persistence;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
Used in the mapping of associations. It is specified on the owning side of an association.
A join table is typically used in the mapping of many-to-many and unidirectional one-to-many associations.
It may also be used to map bidirectional many-to-one/one-to-many associations, unidirectional many-to-one
relationships, and one-to-one associations (both bidirectional and unidirectional).
When a join table is used in mapping a relationship with an embeddable class on the owning side of the
relationship, the containing entity rather than the embeddable class is considered the owner of the
relationship.
If the JoinTable annotation is missing, the default values of the annotation elements apply.
The name of the join table is assumed to be the table names of the associated primary tables concatenated
together (owning side first) using an underscore.
Example:
@JoinTable(
name="CUST_PHONE",
joinColumns=
@JoinColumn(name="CUST_ID", referencedColumnName="ID"),
inverseJoinColumns=
@JoinColumn(name="PHONE_ID", referencedColumnName="ID")
)
See Also: - JoinColumn
- JoinColumns
Since: Java Persistence 1.0
/**
* Used in the mapping of associations. It is specified on the owning side of an association.
* <p>
* A join table is typically used in the mapping of many-to-many and unidirectional one-to-many associations.
* It may also be used to map bidirectional many-to-one/one-to-many associations, unidirectional many-to-one
* relationships, and one-to-one associations (both bidirectional and unidirectional).
* <p>
* When a join table is used in mapping a relationship with an embeddable class on the owning side of the
* relationship, the containing entity rather than the embeddable class is considered the owner of the
* relationship.
* <p>
* If the <code>JoinTable</code> annotation is missing, the default values of the annotation elements apply.
* The name of the join table is assumed to be the table names of the associated primary tables concatenated
* together (owning side first) using an underscore.
* <p>
* <pre>
*
* Example:
*
* @JoinTable(
* name="CUST_PHONE",
* joinColumns=
* @JoinColumn(name="CUST_ID", referencedColumnName="ID"),
* inverseJoinColumns=
* @JoinColumn(name="PHONE_ID", referencedColumnName="ID")
* )
* </pre>
*
* @see JoinColumn
* @see JoinColumns
* @since Java Persistence 1.0
*/
@Target({FIELD})
@Retention(RUNTIME)
public @interface JoinTable {
(Optional) The name of the join table.
Defaults to the concatenated names of the two associated primary entity tables, separated by an
underscore.
Returns: The name
/**
* (Optional) The name of the join table.
* Defaults to the concatenated names of the two associated primary entity tables, separated by an
* underscore.
*
* @return The name
*/
String name() default "";
(Optional) The catalog of the table.
Defaults to the default catalog.
Returns: The catalog
/**
* (Optional) The catalog of the table.
* Defaults to the default catalog.
*
* @return The catalog
*/
String catalog() default "";
(Optional) The schema of the table.
Defaults to the default schema for user.
Returns: The schema
/**
* (Optional) The schema of the table.
* Defaults to the default schema for user.
*
* @return The schema
*/
String schema() default "";
(Optional) The foreign key columns of the join table which reference the primary table of the entity owning the association. (I.e. the owning side of the association). Uses the same defaults as for JoinColumn. Returns: The join columns
/**
* (Optional) The foreign key columns of the join table which reference the primary table of the entity
* owning the association. (I.e. the owning side of the association).
* Uses the same defaults as for {@link JoinColumn}.
*
* @return The join columns
*/
JoinColumn[] joinColumns() default {};
(Optional) The foreign key columns of the join table which reference the primary table of the entity that does not own the association. (I.e. the inverse side of the association). Uses the same defaults as for JoinColumn. Returns: The inverse join cols
/**
* (Optional) The foreign key columns of the join table which reference the primary table of the entity
* that does not own the association. (I.e. the inverse side of the association).
* Uses the same defaults as for {@link JoinColumn}.
*
* @return The inverse join cols
*/
JoinColumn[] inverseJoinColumns() default {};
(Optional) Unique constraints that are to be placed on the table. These are only used if table
generation is in effect.
Defaults to no additional constraints.
Returns: The unique constraints
/**
* (Optional) Unique constraints that are to be placed on the table. These are only used if table
* generation is in effect.
* Defaults to no additional constraints.
*
* @return The unique constraints
*/
UniqueConstraint[] uniqueConstraints() default {};
(Optional) Indexes for the table. These are only used if table generation is in effect.
Returns: The indexes
/**
* (Optional) Indexes for the table. These are only used if table generation is in effect.
*
* @return The indexes
*/
Index[] indexes() default {};
(Optional) Used to specify or control the generation of a foreign key constraint for the columns
corresponding to the joinColumns element when table generation is in effect.
Returns: The foreign key Since: Java Persistence 2.1
/**
* (Optional) Used to specify or control the generation of a foreign key constraint for the columns
* corresponding to the joinColumns element when table generation is in effect.
*
* @return The foreign key
* @since Java Persistence 2.1
*/
ForeignKey foreignKey() default @ForeignKey(ConstraintMode.PROVIDER_DEFAULT);
(Optional) Used to specify or control the generation of a foreign key constraint for the columns
corresponding to the inverseJoinColumns element when table generation is in effect.
Returns: The inverse fk Since: Java Persistence 2.1
/**
* (Optional) Used to specify or control the generation of a foreign key constraint for the columns
* corresponding to the inverseJoinColumns element when table generation is in effect.
*
* @return The inverse fk
* @since Java Persistence 2.1
*/
ForeignKey inverseForeignKey() default @ForeignKey(ConstraintMode.PROVIDER_DEFAULT);
}