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1   package org.codehaus.plexus.metadata.merge;
2   
3   /*
4    * The MIT License
5    *
6    * Copyright (c) 2006, The Codehaus
7    *
8    * Permission is hereby granted, free of charge, to any person obtaining a copy of
9    * this software and associated documentation files (the "Software"), to deal in
10   * the Software without restriction, including without limitation the rights to
11   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
12   * of the Software, and to permit persons to whom the Software is furnished to do
13   * so, subject to the following conditions:
14   *
15   * The above copyright notice and this permission notice shall be included in all
16   * copies or substantial portions of the Software.
17   *
18   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24   * SOFTWARE.
25   */
26  
27  import org.codehaus.plexus.component.annotations.Component;
28  import org.codehaus.plexus.metadata.merge.support.ComponentSetElement;
29  import org.jdom2.Document;
30  
31  /**
32   * @author <a href='mailto:rahul.thakur.xdev@gmail.com'>Rahul Thakur</a>
33   * @version $Id$
34   */
35  @Component(role=Merger.class,hint="componentsXml")
36  public class ComponentsXmlMerger
37      extends AbstractMerger
38  {
39      /**
40       * @see Merger#merge(Document, Document)
41       */
42      public Document merge( Document dDocument, Document rDocument )
43          throws MergeException
44      {
45          // TODO: Ideally we don't want to manipulate the original
46          // dominant document but use its copy for merge.
47          //Document mDoc = (Document) dDocument.clone();        // doesn't merge properly
48          Document mDoc = dDocument;
49          ComponentSetElement dCSE = new ComponentSetElement( mDoc.getRootElement() );
50          ComponentSetElement rCSE = new ComponentSetElement( rDocument.getRootElement() );
51          dCSE.merge( rCSE );
52          // the contents are merged into the dominant document DOM.
53          return mDoc;
54      }
55  
56  }