/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.persistence;
/**
* Represents a store sequence.
*
* @author Abe White
* @since 0.4.1
* @published
*/
public interface Generator {
public static final String UUID_HEX = "uuid-hex";
public static final String UUID_STRING = "uuid-string";
public static final String UUID_TYPE4_STRING = "uuid-type4-string";
public static final String UUID_TYPE4_HEX = "uuid-type4-hex";
/**
* The sequence name.
*/
public String getName();
/**
* The next sequence value.
*/
public Object next();
/**
* The current sequence value, or null if the sequence does not
* support current values.
*/
public Object current();
/**
* Hint to the sequence to allocate additional values up-front for
* efficiency.
*/
public void allocate(int additional);
/**
* @deprecated cast to {@link GeneratorImpl} instead. This
* method pierces the published-API boundary, as does the SPI cast.
*/
public org.apache.openjpa.kernel.Seq getDelegate();
}