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75 lines
2.3 KiB
75 lines
2.3 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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import static com.fr.third.javax.persistence.GenerationType.AUTO;
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/**
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* Provides for the specification of generation strategies for the
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* values of primary keys.
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*
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* <p> The <code>GeneratedValue</code> annotation
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* may be applied to a primary key property or field of an entity or
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* mapped superclass in conjunction with the {@link Id} annotation.
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* The use of the <code>GeneratedValue</code> annotation is only
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* required to be supported for simple primary keys. Use of the
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* <code>GeneratedValue</code> annotation is not supported for derived
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* primary keys.
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*
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* <pre>
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*
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* Example 1:
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*
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* @Id
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* @GeneratedValue(strategy=SEQUENCE, generator="CUST_SEQ")
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* @Column(name="CUST_ID")
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* public Long getId() { return id; }
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*
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* Example 2:
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*
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* @Id
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* @GeneratedValue(strategy=TABLE, generator="CUST_GEN")
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* @Column(name="CUST_ID")
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* Long id;
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* </pre>
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*
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* @see Id
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* @see TableGenerator
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* @see SequenceGenerator
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*
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* @since Java Persistence 1.0
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*/
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@Target({METHOD, FIELD})
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@Retention(RUNTIME)
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public @interface GeneratedValue {
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/**
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* (Optional) The primary key generation strategy
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* that the persistence provider must use to
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* generate the annotated entity primary key.
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*/
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GenerationType strategy() default AUTO;
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/**
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* (Optional) The name of the primary key generator
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* to use as specified in the {@link SequenceGenerator}
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* or {@link TableGenerator} annotation.
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* <p> Defaults to the id generator supplied by persistence provider.
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*/
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String generator() default "";
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}
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