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49 lines
1.7 KiB
49 lines
1.7 KiB
7 years ago
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/*
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* Copyright (c) 2008, 2009, 2011 Oracle, Inc. All rights reserved.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
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* which accompanies this distribution. The Eclipse Public License is available
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* at http://www.eclipse.org/legal/epl-v10.html and the Eclipse Distribution License
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* is available at http://www.eclipse.org/org/documents/edl-v10.php.
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*/
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package com.fr.third.javax.persistence;
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import java.lang.annotation.Retention;
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import java.lang.annotation.Target;
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import static java.lang.annotation.ElementType.FIELD;
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import static java.lang.annotation.ElementType.METHOD;
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import static java.lang.annotation.RetentionPolicy.RUNTIME;
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/**
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* Supports composite map keys that reference entities.
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* <p> The <code>MapKeyJoinColumns</code> annotation groups
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* <code>MapKeyJoinColumn</code> annotations. When the
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* <code>MapKeyJoinColumns</code> annotation is used, both the
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* <code>name</code> and the <code>referencedColumnName</code>
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* elements must be specified in each of the grouped
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* <code>MapKeyJoinColumn</code> annotations.
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*
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* @see MapKeyJoinColumn
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*
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* @since Java Persistence 2.0
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*/
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@Target( { METHOD, FIELD })
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@Retention(RUNTIME)
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public @interface MapKeyJoinColumns {
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/**
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* (Required) The map key join columns that are used to map to the entity
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* that is the map key.
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*/
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MapKeyJoinColumn[] value();
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/**
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* (Optional) The foreign key constraint specification for the join columns. This is used only if table generation
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* is in effect. Default is provider defined.
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*
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* @return The foreign key specification
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*/
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ForeignKey foreignKey() default @ForeignKey();
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}
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