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  }