jakarta.persistence.MapKeyTemporal Maven / Gradle / Ivy

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/*
 * Copyright (c) 2008, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Linda DeMichiel - 2.1
//     Linda DeMichiel - 2.0


package jakarta.persistence;

import java.lang.annotation.Target;
import java.lang.annotation.Retention;
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 2.0
 */
@Target({METHOD, FIELD}) 
@Retention(RUNTIME)
public @interface MapKeyTemporal {

    /** (Required) The type used in mapping
     * java.util.Date or
     * java.util.Calendar. 
     */
    TemporalType value();
}