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.kernel.util;
21  
22  import java.util.Comparator;
23  
24  /**
25   * <a href="ObjectValuePairComparator.java.html"><b><i>View Source</i></b></a>
26   *
27   * @author Brian Wing Shun Chan
28   *
29   */
30  public class ObjectValuePairComparator<K, V>
31      implements Comparator<ObjectValuePair<K, V>> {
32  
33      public ObjectValuePairComparator() {
34          this(true);
35      }
36  
37      public ObjectValuePairComparator(boolean asc) {
38          this(true, asc);
39      }
40  
41      public ObjectValuePairComparator(boolean byKey, boolean asc) {
42          _byKey = byKey;
43          _asc = asc;
44      }
45  
46      public int compare(ObjectValuePair<K, V> ovp1, ObjectValuePair<K, V> ovp2) {
47          if (_byKey) {
48              Comparable key1 = (Comparable)ovp1.getKey();
49              Comparable key2 = (Comparable)ovp2.getKey();
50  
51              if (_asc) {
52                  return key1.compareTo(key2);
53              }
54              else {
55                  return -(key1.compareTo(key2));
56              }
57          }
58          else {
59              Comparable value1 = (Comparable)ovp1.getValue();
60              Comparable value2 = (Comparable)ovp2.getValue();
61  
62              if (_asc) {
63                  return value1.compareTo(value2);
64              }
65              else {
66                  return -(value1.compareTo(value2));
67              }
68          }
69      }
70  
71      private boolean _byKey;
72      private boolean _asc;
73  
74  }