1 /*
2 * Copyright 2006 Simon Raess
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package net.sf.beep4j.internal.util;
17
18 public class IntegerSequence implements Sequence<Integer> {
19
20 private final int increment;
21
22 private int value = 0;
23
24 public IntegerSequence() {
25 this(1);
26 }
27
28 public IntegerSequence(int increment) {
29 this(0, increment);
30 }
31
32 public IntegerSequence(int start, int increment) {
33 this.value = start;
34 this.increment = increment;
35 }
36
37 public synchronized Integer next() {
38 int result = value;
39 value += increment;
40 value = value < 0 ? 0 : value;
41 return result;
42 }
43
44 }