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.kernel.util;
24  
25  import java.io.Reader;
26  
27  import java.util.List;
28  
29  /**
30   * <a href="DiffUtil.java.html"><b><i>View Source</i></b></a>
31   *
32   * <p>
33   * This class can compare two different versions of a text. Source refers to
34   * the earliest version of the text and target refers to a modified version of
35   * source. Changes are considered either as a removal from the source or as an
36   * addition to the target. This class detects changes to an entire line and also
37   * detects changes within lines, such as, removal or addition of characters.
38   * Take a look at <code>DiffTest</code> to see the expected inputs and outputs.
39   * </p>
40   *
41   * @author Bruno Farache
42   *
43   * @see com.liferay.portal.kernel.util.DiffUtil
44   *
45   */
46  public class DiffUtil {
47  
48      public static List<DiffResult>[] diff(Reader source, Reader target) {
49          return getDiff().diff(source, target);
50      }
51  
52      public static List<DiffResult>[] diff(
53          Reader source, Reader target, String addedMarkerStart,
54          String addedMarkerEnd, String deletedMarkerStart,
55          String deletedMarkerEnd, int margin) {
56  
57          return getDiff().diff(
58              source, target, addedMarkerStart, addedMarkerEnd,
59              deletedMarkerStart, deletedMarkerEnd, margin);
60      }
61  
62      public static Diff getDiff() {
63          return _diff;
64      }
65  
66      public void setDiff(Diff diff) {
67          _diff = diff;
68      }
69  
70      private static Diff _diff;
71  
72  }