| SetUtil.java |
1 /**
2 * Copyright (c) 2000-2007 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.Set;
34
35 /**
36 * <a href="SetUtil.java.html"><b><i>View Source</i></b></a>
37 *
38 * @author Brian Wing Shun Chan
39 *
40 */
41 public class SetUtil {
42
43 public static Set fromArray(Object[] array) {
44 if ((array == null) || (array.length == 0)) {
45 return CollectionFactory.getHashSet();
46 }
47
48 Set set = CollectionFactory.getHashSet(array.length);
49
50 for (int i = 0; i < array.length; i++) {
51 set.add(array[i]);
52 }
53
54 return set;
55 }
56
57 public static Set fromFile(String fileName) throws IOException {
58 return fromFile(new File(fileName));
59 }
60
61 public static Set fromFile(File file) throws IOException {
62 Set set = CollectionFactory.getHashSet();
63
64 BufferedReader br = new BufferedReader(new FileReader(file));
65
66 String s = StringPool.BLANK;
67
68 while ((s = br.readLine()) != null) {
69 set.add(s);
70 }
71
72 br.close();
73
74 return set;
75 }
76
77 public static Set fromString(String s) {
78 return fromArray(StringUtil.split(s, StringPool.NEW_LINE));
79 }
80
81 }