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="KeyValuePairComparator.java.html"><b><i>View Source</i></b></a>
26   *
27   * @author Brian Wing Shun Chan
28   *
29   */
30  public class KeyValuePairComparator implements Comparator<KeyValuePair> {
31  
32      public KeyValuePairComparator() {
33          this(true);
34      }
35  
36      public KeyValuePairComparator(boolean asc) {
37          this(true, asc);
38      }
39  
40      public KeyValuePairComparator(boolean byKey, boolean asc) {
41          _byKey = byKey;
42          _asc = asc;
43      }
44  
45      public int compare(KeyValuePair kvp1, KeyValuePair kvp2) {
46          if (_byKey) {
47              String key1 = kvp1.getKey();
48              String key2 = kvp2.getKey();
49  
50              if (_asc) {
51                  return key1.compareTo(key2);
52              }
53              else {
54                  return -(key1.compareTo(key2));
55              }
56          }
57          else {
58              String value1 = kvp1.getValue();
59              String value2 = kvp2.getValue();
60  
61              if (_asc) {
62                  return value1.compareTo(value2);
63              }
64              else {
65                  return -(value1.compareTo(value2));
66              }
67          }
68      }
69  
70      private boolean _byKey;
71      private boolean _asc;
72  
73  }