1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portal.tools.comparator;
21  
22  import java.util.Comparator;
23  import java.util.List;
24  
25  /**
26   * <a href="ColumnsComparator.java.html"><b><i>View Source</i></b></a>
27   *
28   * @author Brian Wing Shun Chan
29   *
30   */
31  public class ColumnsComparator implements Comparator<Object> {
32  
33      public ColumnsComparator(String columnName) {
34          this(new String[] {columnName});
35      }
36  
37      public ColumnsComparator(List<String> columnNames) {
38          this(columnNames.toArray(new String[columnNames.size()]));
39      }
40  
41      public ColumnsComparator(String[] columnNames) {
42          _columnNames = columnNames;
43      }
44  
45      public int compare(Object obj1, Object obj2) {
46          Object[] column1 = (Object[])obj1;
47          Object[] column2 = (Object[])obj2;
48  
49          String columnName1 = (String)column1[0];
50          String columnName2 = (String)column2[0];
51  
52          int x = -1;
53  
54          for (int i = 0; i < _columnNames.length; i++) {
55              if (_columnNames[i].equals(columnName1)) {
56                  x = i;
57  
58                  break;
59              }
60          }
61  
62          int y = -1;
63  
64          for (int i = 0; i < _columnNames.length; i++) {
65              if (_columnNames[i].equals(columnName2)) {
66                  y = i;
67  
68                  break;
69              }
70          }
71  
72          if ((x == -1) && (y > -1)) {
73              return 1;
74          }
75          else if ((x > -1) && (y == -1)) {
76              return -1;
77          }
78          else if ((x > -1) && (y > -1)) {
79              if (x < y) {
80                  return -1;
81              }
82              else if (x > y) {
83                  return 1;
84              }
85          }
86  
87          return 0;
88      }
89  
90      private String[] _columnNames;
91  
92  }