1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights 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  }