| SetUtil.java |
1 /**
2 * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23 package com.liferay.util;
24
25 import com.liferay.portal.kernel.util.StringPool;
26 import com.liferay.portal.kernel.util.StringUtil;
27
28 import java.io.BufferedReader;
29 import java.io.File;
30 import java.io.FileReader;
31 import java.io.IOException;
32
33 import java.util.HashSet;
34 import java.util.Set;
35
36 /**
37 * <a href="SetUtil.java.html"><b><i>View Source</i></b></a>
38 *
39 * @author Brian Wing Shun Chan
40 *
41 */
42 public class SetUtil {
43
44 public static Set<Long> fromArray(long[] array) {
45 if ((array == null) || (array.length == 0)) {
46 return new HashSet();
47 }
48
49 Set<Long> set = new HashSet<Long>(array.length);
50
51 for (int i = 0; i < array.length; i++) {
52 set.add(array[i]);
53 }
54
55 return set;
56 }
57
58 public static Set fromArray(Object[] array) {
59 if ((array == null) || (array.length == 0)) {
60 return new HashSet();
61 }
62
63 Set set = new HashSet(array.length);
64
65 for (int i = 0; i < array.length; i++) {
66 set.add(array[i]);
67 }
68
69 return set;
70 }
71
72 public static Set fromFile(String fileName) throws IOException {
73 return fromFile(new File(fileName));
74 }
75
76 public static Set fromFile(File file) throws IOException {
77 Set set = new HashSet();
78
79 BufferedReader br = new BufferedReader(new FileReader(file));
80
81 String s = StringPool.BLANK;
82
83 while ((s = br.readLine()) != null) {
84 set.add(s);
85 }
86
87 br.close();
88
89 return set;
90 }
91
92 public static Set fromString(String s) {
93 return fromArray(StringUtil.split(s, StringPool.NEW_LINE));
94 }
95
96 }