org.apache.openjpa.kernel.UUIDStringSeq Maven / Gradle / Ivy
/*
* 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.kernel;
import org.apache.openjpa.lib.util.UUIDGenerator;
import org.apache.openjpa.meta.ClassMetaData;
/**
* Sequence for generating 16-character UUID strings.
*
* @author Abe White
*/
public class UUIDStringSeq
implements Seq {
private static final UUIDStringSeq _instance = new UUIDStringSeq();
private String _last = null;
/**
* Return the singleton instance.
*/
public static UUIDStringSeq getInstance() {
return _instance;
}
/**
* Hide constructor.
*/
private UUIDStringSeq() {
}
public void setType(int type) {
}
public synchronized Object next(StoreContext ctx, ClassMetaData meta) {
_last = UUIDGenerator.nextString(UUIDGenerator.TYPE1);
return _last;
}
public synchronized Object current(StoreContext ctx, ClassMetaData meta) {
return _last;
}
public void allocate(int additional, StoreContext ctx, ClassMetaData meta) {
}
public void close() {
}
}