CrimsonDOMAdapter


1   /*-- 
2   
3    $Id: CrimsonDOMAdapter.java,v 1.16 2004/02/06 09:28:31 jhunter Exp $
4   
5    Copyright (C) 2000-2004 Jason Hunter & Brett McLaughlin.
6    All rights reserved.
7    
8    Redistribution and use in source and binary forms, with or without
9    modification, are permitted provided that the following conditions
10   are met:
11   
12   1. Redistributions of source code must retain the above copyright
13      notice, this list of conditions, and the following disclaimer.
14   
15   2. Redistributions in binary form must reproduce the above copyright
16      notice, this list of conditions, and the disclaimer that follows 
17      these conditions in the documentation and/or other materials 
18      provided with the distribution.
19  
20   3. The name "JDOM" must not be used to endorse or promote products
21      derived from this software without prior written permission.  For
22      written permission, please contact <request_AT_jdom_DOT_org>.
23   
24   4. Products derived from this software may not be called "JDOM", nor
25      may "JDOM" appear in their name, without prior written permission
26      from the JDOM Project Management <request_AT_jdom_DOT_org>.
27   
28   In addition, we request (but do not require) that you include in the 
29   end-user documentation provided with the redistribution and/or in the 
30   software itself an acknowledgement equivalent to the following:
31       "This product includes software developed by the
32        JDOM Project (http://www.jdom.org/)."
33   Alternatively, the acknowledgment may be graphical using the logos 
34   available at http://www.jdom.org/images/logos.
35  
36   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
37   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
38   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
39   DISCLAIMED.  IN NO EVENT SHALL THE JDOM AUTHORS OR THE PROJECT
40   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
43   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
44   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
45   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
46   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47   SUCH DAMAGE.
48  
49   This software consists of voluntary contributions made by many 
50   individuals on behalf of the JDOM Project and was originally 
51   created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
52   Brett McLaughlin <brett_AT_jdom_DOT_org>.  For more information
53   on the JDOM Project, please see <http://www.jdom.org/>.
54   
55   */
56  
57  package org.jdom.adapters;
58  
59  import java.io.*;
60  import java.lang.reflect.*;
61  
62  import org.jdom.*;
63  import org.w3c.dom.Document  ;
64  import org.xml.sax.*;
65  
66  /**
67   * An adapter for the Apache Crimson DOM parser.
68   * 
69   * @version $Revision: 1.16 $, $Date: 2004/02/06 09:28:31 $
70   * @author  Jason Hunter
71   */
72  public class CrimsonDOMAdapter extends AbstractDOMAdapter {
73  
74      private static final String   CVS_ID = 
75        "@(#) $RCSfile: CrimsonDOMAdapter.java,v $ $Revision: 1.16 $ $Date: 2004/02/06 09:28:31 $ $Name:  $";
76  
77      /**
78       * This creates a new <code>{@link Document}</code> from an
79       * existing <code>InputStream</code> by letting a DOM
80       * parser handle parsing using the supplied stream.
81       *
82       * @param in <code>InputStream</code> to parse.
83       * @param validate <code>boolean</code> to indicate if validation should occur.
84       * @return <code>Document</code> - instance ready for use.
85       * @throws IOException when I/O error occurs.
86       * @throws JDOMException when errors occur in parsing.
87       */
88      public Document   getDocument(InputStream in, boolean validate)
89          throws IOException, JDOMException  {
90  
91          try {
92              Class  [] parameterTypes = new Class  [2];
93              parameterTypes[0] = Class.forName("java.io.InputStream");
94              parameterTypes[1] = boolean.class;
95  
96              Object  [] args = new Object  [2];
97              args[0] = in;
98              args[1] = new Boolean  (false);
99  
100             // Load the parser class and invoke the parse method
101             Class   parserClass = Class.forName("org.apache.crimson.tree.XmlDocument");
102             Method createXmlDocument =
103                 parserClass.getMethod("createXmlDocument", parameterTypes);
104             Document   doc =
105                 (Document  )createXmlDocument.invoke(null, args);
106 
107             return doc;
108 
109         } catch (InvocationTargetException e) {
110             Throwable   targetException = e.getTargetException();
111             if (targetException instanceof org.xml.sax.SAXParseException  ) {
112                 SAXParseException parseException = (SAXParseException)targetException;
113                 throw new JDOMException("Error on line " + parseException.getLineNumber() +
114                                       " of XML document: " + parseException.getMessage(), parseException);
115             } else if (targetException instanceof IOException) {
116                 IOException ioException = (IOException) targetException;
117                 throw ioException;
118             } else {
119                 throw new JDOMException(targetException.getMessage(), targetException);
120             }
121         } catch (Exception   e) {
122             throw new JDOMException(e.getClass().getName() + ": " +
123                                   e.getMessage(), e);
124         }
125     }
126 
127     /**
128      * This creates an empty <code>Document</code> object based
129      * on a specific parser implementation.
130      *
131      * @return <code>Document</code> - created DOM Document.
132      * @throws JDOMException when errors occur.
133      */
134     public Document   createDocument() throws JDOMException {
135         try {
136             return
137                 (Document  )Class.forName(
138                     "org.apache.crimson.tree.XmlDocument")
139                     .newInstance();
140 
141         } catch (Exception   e) {
142             throw new JDOMException(e.getClass().getName() + ": " +
143                                   e.getMessage() + " when creating document", e);
144         }
145     }
146 }
147
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