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.Reader;
23  
24  import java.util.List;
25  
26  /**
27   * <a href="DiffUtil.java.html"><b><i>View Source</i></b></a>
28   *
29   * <p>
30   * This class can compare two different versions of a text. Source refers to
31   * the earliest version of the text and target refers to a modified version of
32   * source. Changes are considered either as a removal from the source or as an
33   * addition to the target. This class detects changes to an entire line and also
34   * detects changes within lines, such as, removal or addition of characters.
35   * Take a look at <code>DiffTest</code> to see the expected inputs and outputs.
36   * </p>
37   *
38   * @author Bruno Farache
39   *
40   * @see com.liferay.portal.kernel.util.DiffUtil
41   *
42   */
43  public class DiffUtil {
44  
45      public static List<DiffResult>[] diff(Reader source, Reader target) {
46          return getDiff().diff(source, target);
47      }
48  
49      public static List<DiffResult>[] diff(
50          Reader source, Reader target, String addedMarkerStart,
51          String addedMarkerEnd, String deletedMarkerStart,
52          String deletedMarkerEnd, int margin) {
53  
54          return getDiff().diff(
55              source, target, addedMarkerStart, addedMarkerEnd,
56              deletedMarkerStart, deletedMarkerEnd, margin);
57      }
58  
59      public static Diff getDiff() {
60          return _diff;
61      }
62  
63      public void setDiff(Diff diff) {
64          _diff = diff;
65      }
66  
67      private static Diff _diff;
68  
69  }