| /* |
| * 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 Jeremy Bauer |
| */ |
| public class UUIDType4StringSeq |
| implements Seq { |
| |
| private static final UUIDType4StringSeq _instance = |
| new UUIDType4StringSeq(); |
| |
| private String _last = null; |
| |
| /** |
| * Return the singleton instance. |
| */ |
| public static UUIDType4StringSeq getInstance() { |
| return _instance; |
| } |
| |
| /** |
| * Hide constructor. |
| */ |
| private UUIDType4StringSeq() { |
| } |
| |
| @Override |
| public void setType(int type) { |
| } |
| |
| @Override |
| public synchronized Object next(StoreContext ctx, ClassMetaData meta) { |
| _last = UUIDGenerator.nextString(UUIDGenerator.TYPE4); |
| return _last; |
| } |
| |
| @Override |
| public synchronized Object current(StoreContext ctx, ClassMetaData meta) { |
| return _last; |
| } |
| |
| @Override |
| public void allocate(int additional, StoreContext ctx, ClassMetaData meta) { |
| } |
| |
| @Override |
| public void close() { |
| } |
| } |