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


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: XPathDemo.java,v 1.4 2005/01/29 14:52:57 maartenc Exp $
8  */
9
10 package org.dom4j.samples;
11
12 import java.util.Iterator JavaDoc;
13 import java.util.List JavaDoc;
14
15 import org.dom4j.Document;
16
17 /**
18  * A sample program to demonstrate the use of XPath expressions.
19  *
20  * @author <a HREF="mailto:james.strachan@metastuff.com">James Strachan </a>
21  * @version $Revision: 1.4 $
22  */
23 public class XPathDemo extends SAXDemo {
24
25     protected String JavaDoc xpath = "*";
26
27     public static void main(String JavaDoc[] args) {
28         run(new XPathDemo(), args);
29     }
30
31     public XPathDemo() {
32     }
33
34     public void run(String JavaDoc[] args) throws Exception JavaDoc {
35         if (args.length < 2) {
36             printUsage("<XML document URL> <XPath expression>");
37             return;
38         }
39
40         String JavaDoc xmlFile = args[0];
41         xpath = args[1];
42
43         writer = createXMLWriter();
44
45         Document document = parse(xmlFile);
46         process(document);
47     }
48
49     protected void process(Document document) throws Exception JavaDoc {
50         println("Evaluating XPath: " + xpath);
51
52         List JavaDoc list = document.selectNodes(xpath);
53
54         println("Found: " + list.size() + " node(s)");
55         println("Results:");
56
57         for (Iterator JavaDoc iter = list.iterator(); iter.hasNext();) {
58             Object JavaDoc object = iter.next();
59             writer.write(object);
60             writer.println();
61         }
62
63         writer.flush();
64     }
65 }
66
67 /*
68  * Redistribution and use of this software and associated documentation
69  * ("Software"), with or without modification, are permitted provided that the
70  * following conditions are met:
71  *
72  * 1. Redistributions of source code must retain copyright statements and
73  * notices. Redistributions must also contain a copy of this document.
74  *
75  * 2. Redistributions in binary form must reproduce the above copyright notice,
76  * this list of conditions and the following disclaimer in the documentation
77  * and/or other materials provided with the distribution.
78  *
79  * 3. The name "DOM4J" must not be used to endorse or promote products derived
80  * from this Software without prior written permission of MetaStuff, Ltd. For
81  * written permission, please contact dom4j-info@metastuff.com.
82  *
83  * 4. Products derived from this Software may not be called "DOM4J" nor may
84  * "DOM4J" appear in their names without prior written permission of MetaStuff,
85  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
86  *
87  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
88  *
89  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
90  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
91  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
92  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
93  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
94  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
95  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
96  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
97  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
98  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
99  * POSSIBILITY OF SUCH DAMAGE.
100  *
101  * Copyright 2001-2004 (C) MetaStuff, Ltd. All Rights Reserved.
102  *
103  * $Id: XPathDemo.java,v 1.4 2005/01/29 14:52:57 maartenc Exp $
104  */
105
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