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.io.Serializable;
23  
24  import java.util.Comparator;
25  
26  /**
27   * <a href="StringComparator.java.html"><b><i>View Source</i></b></a>
28   *
29   * @author Brian Wing Shun Chan
30   *
31   */
32  public class StringComparator implements Comparator<String>, Serializable {
33  
34      public StringComparator() {
35          this(true, false);
36      }
37  
38      public StringComparator(boolean asc, boolean caseSensitive) {
39          _asc = asc;
40          _caseSensitive = caseSensitive;
41      }
42  
43      public int compare(String s1, String s2) {
44          if (s1 == null) {
45              s1 = StringPool.BLANK;
46          }
47  
48          if (s2 == null) {
49              s2 = StringPool.BLANK;
50          }
51  
52          if (!_asc) {
53              String temp = s1;
54  
55              s1 = s2;
56              s2 = temp;
57          }
58  
59          if (_caseSensitive) {
60              return s1.compareTo(s2);
61          }
62          else {
63              return s1.compareToIgnoreCase(s2);
64          }
65      }
66  
67      private boolean _asc;
68      private boolean _caseSensitive;
69  
70  }