| HashCodeCacheKeyGenerator.java |
1 /**
2 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or modify it under
5 * the terms of the GNU Lesser General Public License as published by the Free
6 * Software Foundation; either version 2.1 of the License, or (at your option)
7 * any later version.
8 *
9 * This library is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
12 * details.
13 */
14
15 package com.liferay.portal.cache.key;
16
17 import com.liferay.portal.kernel.cache.key.CacheKeyGenerator;
18 import com.liferay.portal.kernel.util.StringBundler;
19
20 /**
21 * <a href="HashCodeCacheKeyGenerator.java.html"><b><i>View Source</i></b></a>
22 *
23 * @author Michael C. Han
24 * @author Shuyang Zhou
25 */
26 public class HashCodeCacheKeyGenerator extends BaseCacheKeyGenerator {
27
28 public CacheKeyGenerator clone() {
29 return new HashCodeCacheKeyGenerator();
30 }
31
32 public String getCacheKey(String key) {
33 return String.valueOf(key.hashCode());
34 }
35
36 public String getCacheKey(String[] keys) {
37 int hashCode = 0;
38
39 for (String key : keys) {
40 hashCode = 31 * hashCode + key.hashCode();
41 }
42
43 return String.valueOf(hashCode);
44 }
45
46 public String getCacheKey(StringBundler sb) {
47 int hashCode = 0;
48
49 for (int i = 0; i < sb.index(); i++) {
50 hashCode = 31 * hashCode + sb.stringAt(i).hashCode();
51 }
52
53 return String.valueOf(hashCode);
54 }
55
56 }