javax.persistence.MapKeyTemporal Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of javax.persistence Show documentation

The Java Persistence API (JPA) : a standard interface-based Java model abstraction of persistence, developed by the JCP.

There is a newer version: 2.2.4

Show newest version

/*
 * 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.ANNOTATION_TYPE;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * This annotation must be specified for persistent map keys of type {@link java.util.Date} and
 * {@link java.util.Calendar}. It may only be specified for map keys of these types.
 * 
 * The MapKeyTemporal annotation can be applied to an element collection or relationship of type
 * java.util.Map in conjunction with the ElementCollection, OneToMany,
 * or ManyToMany annotation.
 *
 * 
 *     Example:
 * 
 *     @OneToMany
 *     @MapKeyTemporal(DATE)
 *     protected java.util.Map<java.util.Date, Employee> employees;
 * 
 * @since Java Persistence 2.0
 */
@Target({ANNOTATION_TYPE, METHOD, FIELD})
@Retention(RUNTIME)
public @interface MapKeyTemporal
{
    /**
     * (Required) The type used in mapping java.util.Date or java.util.Calendar.
     * @return The type used
     */
    TemporalType value();
}