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/*******************************************************************************
 * Copyright (c) 2008 - 2017 Oracle Corporation. 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.
 *
 * Contributors:
 *     Lukas Jungmann  - Java Persistence 2.2
 *     Linda DeMichiel - Java Persistence 2.1
 *     Linda DeMichiel - Java Persistence 2.0
 *
 ******************************************************************************/ 
package javax.persistence;

import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Repeatable;

/**
 * Defines a primary key generator that may be referenced by name when
 * a generator element is specified for the {@link GeneratedValue}
 * annotation. A sequence generator may be specified on the entity
 * class or on the primary key field or property. The scope of the
 * generator name is global to the persistence unit (across all
 * generator types).
 *
 * 
 *   Example:
 *
 *   @SequenceGenerator(name="EMP_SEQ", allocationSize=25)
 * 
* * @since Java Persistence 1.0 */ @Repeatable(SequenceGenerators.class) @Target({TYPE, METHOD, FIELD}) @Retention(RUNTIME) public @interface SequenceGenerator { /** * (Required) A unique generator name that can be referenced * by one or more classes to be the generator for primary key * values. */ String name(); /** * (Optional) The name of the database sequence object from * which to obtain primary key values. *

Defaults to a provider-chosen value. */ String sequenceName() default ""; /** (Optional) The catalog of the sequence generator. * * @since Java Persistence 2.0 */ String catalog() default ""; /** (Optional) The schema of the sequence generator. * * @since Java Persistence 2.0 */ String schema() default ""; /** * (Optional) The value from which the sequence object * is to start generating. */ int initialValue() default 1; /** * (Optional) The amount to increment by when allocating * sequence numbers from the sequence. */ int allocationSize() default 50; }





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