1   /**
2    * Copyright (c) 2000-2009 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.portal.tools.comparator;
24  
25  import java.util.Comparator;
26  import java.util.List;
27  
28  /**
29   * <a href="ColumnsComparator.java.html"><b><i>View Source</i></b></a>
30   *
31   * @author Brian Wing Shun Chan
32   *
33   */
34  public class ColumnsComparator implements Comparator<Object> {
35  
36      public ColumnsComparator(String columnName) {
37          this(new String[] {columnName});
38      }
39  
40      public ColumnsComparator(List<String> columnNames) {
41          this(columnNames.toArray(new String[columnNames.size()]));
42      }
43  
44      public ColumnsComparator(String[] columnNames) {
45          _columnNames = columnNames;
46      }
47  
48      public int compare(Object obj1, Object obj2) {
49          Object[] column1 = (Object[])obj1;
50          Object[] column2 = (Object[])obj2;
51  
52          String columnName1 = (String)column1[0];
53          String columnName2 = (String)column2[0];
54  
55          int x = -1;
56  
57          for (int i = 0; i < _columnNames.length; i++) {
58              if (_columnNames[i].equals(columnName1)) {
59                  x = i;
60  
61                  break;
62              }
63          }
64  
65          int y = -1;
66  
67          for (int i = 0; i < _columnNames.length; i++) {
68              if (_columnNames[i].equals(columnName2)) {
69                  y = i;
70  
71                  break;
72              }
73          }
74  
75          if ((x == -1) && (y > -1)) {
76              return 1;
77          }
78          else if ((x > -1) && (y == -1)) {
79              return -1;
80          }
81          else if ((x > -1) && (y > -1)) {
82              if (x < y) {
83                  return -1;
84              }
85              else if (x > y) {
86                  return 1;
87              }
88          }
89  
90          return 0;
91      }
92  
93      private String[] _columnNames;
94  
95  }