56 lines
1.9 KiB
Java
56 lines
1.9 KiB
Java
/*******************************************************************************
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* Copyright (c) 2008 - 2013 Oracle Corporation. 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.
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* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
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* and the Eclipse Distribution License is available at
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* http://www.eclipse.org/org/documents/edl-v10.php.
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*
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* Contributors:
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* Linda DeMichiel - Java Persistence 2.1
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* Linda DeMichiel - Java Persistence 2.0
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*
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******************************************************************************/
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package javax.persistence;
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import java.lang.annotation.Target;
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import java.lang.annotation.Retention;
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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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* Specifies the primary key of an entity.
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* The field or property to which the <code>Id</code> annotation is applied
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* should be one of the following types: any Java primitive type;
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* any primitive wrapper type;
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* <code>String</code>;
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* <code>java.util.Date</code>;
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* <code>java.sql.Date</code>;
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* <code>java.math.BigDecimal</code>;
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* <code>java.math.BigInteger</code>.
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*
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* <p>The mapped column for the primary key of the entity is assumed
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* to be the primary key of the primary table. If no <code>Column</code> annotation
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* is specified, the primary key column name is assumed to be the name
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* of the primary key property or field.
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*
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* <pre>
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* Example:
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*
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* @Id
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* public Long getId() { return id; }
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* </pre>
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*
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* @see Column
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* see GeneratedValue
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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 Id {}
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