JahiaDOMObject


1   //
2   //                                   ____.
3   //                       __/\ ______|    |__/\.     _______
4   //            __   .____|    |       \   |    +----+       \
5   //    _______|  /--|    |    |    -   \  _    |    :    -   \_________
6   //   \\______: :---|    :    :           |    :    |         \________>
7   //           |__\---\_____________:______:    :____|____:_____\
8   //                                      /_____|
9   //
10  //                 . . . i n   j a h i a   w e   t r u s t . . .
11  //
12  //
13  //
14  //  JahiaDOMObject
15  //
16  //  NK      25.07.2001
17  //
18  
19  package org.jahia.data;
20  
21  import java.io.FileOutputStream  ;
22  
23  import javax.xml.transform.OutputKeys  ;
24  import javax.xml.transform.Transformer  ;
25  import javax.xml.transform.TransformerFactory  ;
26  import javax.xml.transform.dom.DOMSource  ;
27  import javax.xml.transform.stream.StreamResult  ;
28  
29  import org.jahia.exceptions.JahiaException;
30  import org.w3c.dom.Document  ;
31  import org.w3c.dom.Element  ;
32  
33  
34  /**
35   * A DOM Object typically contains a DOM Document
36   *
37   * @author Khue Nguyen
38   * @version 1.0
39   */
40  public abstract class JahiaDOMObject {
41  
42  
43      protected Document   xmlDoc = null;
44  
45  
46      //--------------------------------------------------------------------------
47      /**
48       * save the document to a file
49       *
50       * @param String destFileName
51       */
52      public void save (String   destFileName) throws JahiaException{
53          saveFile(destFileName);
54      }
55  
56      //--------------------------------------------------------------------------
57      /**
58       * return a reference to the DOM Document
59       *
60       * @return Document the DOM Document
61       */
62      public Document   getDocument () {
63          return xmlDoc;
64      }
65  
66      //--------------------------------------------------------------------------
67      /**
68       * return a DOM as string
69       *
70       * @return Document the DOM Document
71       */
72      public String   toString () {
73          Element   el = (Element  )xmlDoc.getDocumentElement();
74          if (  el != null ){
75              return el.toString();
76          }
77          return null;
78      }
79  
80      //--------------------------------------------------------------------------
81      private void saveFile(String   destinationFileName)
82      throws JahiaException {
83  
84          try {
85  
86              xmlDoc.normalize(); // cleanup DOM tree a little
87  
88              TransformerFactory   tfactory = TransformerFactory.newInstance();
89  
90              // This creates a transformer that does a simple identity transform,
91              // and thus can be used for all intents and purposes as a serializer.
92              Transformer   serializer = tfactory.newTransformer();
93  
94              serializer.setOutputProperty(OutputKeys.METHOD, "xml");
95              serializer.setOutputProperty(OutputKeys.INDENT, "yes");
96              FileOutputStream   fileStream = new FileOutputStream  (destinationFileName);
97              serializer.transform(new DOMSource  (xmlDoc),
98                               new StreamResult  (fileStream));
99  
100         } catch ( Throwable   t ){
101             throw new JahiaException(  "XMLPortlets",
102                                         "Exception " + t.getMessage(),
103                                         JahiaException.ERROR_SEVERITY,
104                                         JahiaException.SERVICE_ERROR);
105         }
106 
107     }
108 
109 }
110
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