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Java > Open Source Codes > org > dom4j > samples > VisitorDemo2


1 /*
2  * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
3  *
4  * This software is open source.
5  * See the bottom of this file for the licence.
6  *
7  * $Id: VisitorDemo2.java,v 1.4 2005/01/29 14:52:57 maartenc Exp $
8  */
9
10 package org.dom4j.samples;
11
12 import org.dom4j.Document;
13 import org.dom4j.DocumentFactory;
14 import org.dom4j.io.SAXReader;
15
16 /**
17  * This demo uses the Visitor Pattern in DOM4J to display the effect of changing
18  * the {@link DocumentFactory}used when reading a DOM4J object model from a
19  * {@link SAXReader}.
20  *
21  * @author <a HREF="mailto:james.strachan@metastuff.com">James Strachan </a>
22  * @version $Revision: 1.4 $
23  */
24 public class VisitorDemo2 extends VisitorDemo {
25
26     /** The DocumentFactory class name to use */
27     protected String JavaDoc documentFactoryClassName;
28
29     public static void main(String JavaDoc[] args) {
30         run(new VisitorDemo2(), args);
31     }
32
33     public VisitorDemo2() {
34     }
35
36     public void run(String JavaDoc[] args) throws Exception JavaDoc {
37         if (args.length < 1) {
38             printUsage("<XML document URL> [<Document Factory Class Name>]");
39             return;
40         }
41
42         String JavaDoc xmlFile = args[0];
43
44         documentFactoryClassName = (args.length > 1) ? args[1] : null;
45
46         Document document = parse(xmlFile);
47         process(document);
48     }
49
50     protected SAXReader createSAXReader() throws Exception JavaDoc {
51         println("Using SAX parser: "
52                 + System.getProperty("org.xml.sax.driver", "default"));
53
54         SAXReader answer = new SAXReader();
55         if (documentFactoryClassName != null) {
56             try {
57                 Class JavaDoc theClass = Class.forName(documentFactoryClassName);
58                 DocumentFactory factory = (DocumentFactory) theClass
59                         .newInstance();
60                 if (factory != null) {
61                     println("DocumentFactory: " + factory);
62                     answer.setDocumentFactory(factory);
63                 }
64             } catch (Exception JavaDoc e) {
65                 println("ERROR: Failed to create an instance of DocumentFactory: "
66                         + documentFactoryClassName);
67                 println("Exception: " + e);
68                 e.printStackTrace();
69             }
70         }
71         return answer;
72     }
73 }
74
75 /*
76  * Redistribution and use of this software and associated documentation
77  * ("Software"), with or without modification, are permitted provided that the
78  * following conditions are met:
79  *
80  * 1. Redistributions of source code must retain copyright statements and
81  * notices. Redistributions must also contain a copy of this document.
82  *
83  * 2. Redistributions in binary form must reproduce the above copyright notice,
84  * this list of conditions and the following disclaimer in the documentation
85  * and/or other materials provided with the distribution.
86  *
87  * 3. The name "DOM4J" must not be used to endorse or promote products derived
88  * from this Software without prior written permission of MetaStuff, Ltd. For
89  * written permission, please contact dom4j-info@metastuff.com.
90  *
91  * 4. Products derived from this Software may not be called "DOM4J" nor may
92  * "DOM4J" appear in their names without prior written permission of MetaStuff,
93  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
94  *
95  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
96  *
97  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
98  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
99  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
100  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
101  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
102  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
103  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
104  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
105  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
106  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
107  * POSSIBILITY OF SUCH DAMAGE.
108  *
109  * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
110  *
111  * $Id: VisitorDemo2.java,v 1.4 2005/01/29 14:52:57 maartenc Exp $
112  */
113
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