1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.id;
18
19 /**
20 * Abstract superclass for LongIdentifierGenerator implementations.
21 *
22 * @author Commons-Id team
23 * @version $Id: AbstractLongIdentifierGenerator.java 480488 2006-11-29 08:57:26Z bayard $
24 */
25 public abstract class AbstractLongIdentifierGenerator implements LongIdentifierGenerator {
26
27 /**
28 * Constructor.
29 */
30 protected AbstractLongIdentifierGenerator() {
31 super();
32 }
33
34 /**
35 * Returns the maximum value of an identifier from this generator.
36 *
37 * <p>The default implementation returns Long.MAX_VALUE. Implementations
38 * whose identifiers are bounded below Long.MAX_VALUE should override this method to
39 * return the maximum value of a generated identifier.</p>
40 *
41 * @return {@inheritDoc}
42 */
43 public long maxValue() {
44 return Long.MAX_VALUE;
45 }
46
47 /**
48 * Returns the minimum value of an identifier from this generator.
49 *
50 * <p>The default implementation returns Long.MIN_VALUE. Implementations
51 * whose identifiers are bounded above Long.MIN_VALUE should override this method to
52 * return the minimum value of a generated identifier.</p>
53 *
54 * @return {@inheritDoc}
55 */
56 public long minValue() {
57 return Long.MIN_VALUE;
58 }
59
60 public Object nextIdentifier() {
61 return this.nextLongIdentifier();
62 }
63
64 public abstract Long nextLongIdentifier();
65 }