1 /**
2 * Copyright 2010-2013 The Kuali Foundation
3 *
4 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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 org.kuali.common.util;
17
18 public class Counter {
19
20 int count;
21
22 public Counter() {
23 this(0);
24 }
25
26 public Counter(int startValue) {
27 super();
28 this.count = startValue;
29 }
30
31 public synchronized int increment() {
32 Assert.isFalse(count == Integer.MAX_VALUE, "max value exceeded");
33 return count++;
34 }
35
36 public synchronized int decrement() {
37 Assert.isFalse(count == Integer.MIN_VALUE, "min value exceeded");
38 return count--;
39 }
40
41 public synchronized int getValue() {
42 return count;
43 }
44 }