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Java > Open Source Codes > groovy > xml > SAXBuilder


1 /*
2  $Id: SAXBuilder.java,v 1.4 2004/04/27 02:25:29 spullara Exp $
3
4  Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5
6  Redistribution and use of this software and associated documentation
7  ("Software"), with or without modification, are permitted provided
8  that the following conditions are met:
9
10  1. Redistributions of source code must retain copyright
11     statements and notices. Redistributions must also contain a
12     copy of this document.
13
14  2. Redistributions in binary form must reproduce the
15     above copyright notice, this list of conditions and the
16     following disclaimer in the documentation and/or other
17     materials provided with the distribution.
18
19  3. The name "groovy" must not be used to endorse or promote
20     products derived from this Software without prior written
21     permission of The Codehaus. For written permission,
22     please contact info@codehaus.org.
23
24  4. Products derived from this Software may not be called "groovy"
25     nor may "groovy" appear in their names without prior written
26     permission of The Codehaus. "groovy" is a registered
27     trademark of The Codehaus.
28
29  5. Due credit should be given to The Codehaus -
30     http://groovy.codehaus.org/
31
32  THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
36  THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43  OF THE POSSIBILITY OF SUCH DAMAGE.
44
45  */

46 package groovy.xml;
47
48 import groovy.util.BuilderSupport;
49
50 import java.util.Iterator JavaDoc;
51 import java.util.Map JavaDoc;
52
53 import org.xml.sax.Attributes JavaDoc;
54 import org.xml.sax.ContentHandler JavaDoc;
55 import org.xml.sax.SAXException JavaDoc;
56 import org.xml.sax.helpers.AttributesImpl JavaDoc;
57
58 /**
59  * A helper class for creating a W3C D
60  *
61  * @author <a HREF="mailto:james@coredevelopers.net">James Strachan</a>
62  * @version $Revision: 1.4 $
63  */

64 public class SAXBuilder extends BuilderSupport {
65
66     private ContentHandler JavaDoc handler;
67     private Attributes JavaDoc emptyAttributes = new AttributesImpl JavaDoc();
68
69     public SAXBuilder(ContentHandler JavaDoc handler) {
70         this.handler = handler;
71     }
72
73     protected void setParent(Object JavaDoc parent, Object JavaDoc child) {
74     }
75
76     protected Object JavaDoc createNode(Object JavaDoc name) {
77         doStartElement(name, emptyAttributes);
78         return name;
79     }
80
81     protected Object JavaDoc createNode(Object JavaDoc name, Object JavaDoc value) {
82         doStartElement(name, emptyAttributes);
83         doText(value);
84         return name;
85     }
86
87     /**
88      * @param value
89      */

90     private void doText(Object JavaDoc value) {
91         try {
92             char[] text = value.toString().toCharArray();
93             handler.characters(text, 0, text.length);
94         }
95         catch (SAXException JavaDoc e) {
96             handleException(e);
97         }
98     }
99
100     protected Object JavaDoc createNode(Object JavaDoc name, Map JavaDoc attributeMap, Object JavaDoc text) {
101         AttributesImpl JavaDoc attributes = new AttributesImpl JavaDoc();
102         for (Iterator JavaDoc iter = attributeMap.entrySet().iterator(); iter.hasNext();) {
103             Map.Entry JavaDoc entry = (Map.Entry JavaDoc) iter.next();
104             Object JavaDoc key = entry.getKey();
105             Object JavaDoc value = entry.getValue();
106             String JavaDoc uri = "";
107             String JavaDoc localName = null;
108             String JavaDoc qualifiedName = "";
109             String JavaDoc valueText = (value != null) ? value.toString() : "";
110             if (key instanceof QName) {
111                 QName qname = (QName) key;
112                 uri = qname.getNamespaceURI();
113                 localName = qname.getLocalPart();
114                 qualifiedName = qname.getQualifiedName();
115             }
116             else {
117                 localName = key.toString();
118                 qualifiedName = localName;
119             }
120
121             attributes.addAttribute(uri, localName, qualifiedName, "CDATA", valueText);
122         }
123         doStartElement(name, attributes);
124         if (text != null) {
125             doText(text);
126         }
127         return name;
128     }
129
130     protected void doStartElement(Object JavaDoc name, Attributes JavaDoc attributes) {
131         String JavaDoc uri = "";
132         String JavaDoc localName = null;
133         String JavaDoc qualifiedName = "";
134         if (name instanceof QName) {
135             QName qname = (QName) name;
136             uri = qname.getNamespaceURI();
137             localName = qname.getLocalPart();
138             qualifiedName = qname.getQualifiedName();
139         }
140         else {
141             localName = name.toString();
142             qualifiedName = localName;
143         }
144         try {
145             handler.startElement(uri, localName, qualifiedName, attributes);
146         }
147         catch (SAXException JavaDoc e) {
148             handleException(e);
149         }
150     }
151
152     protected void nodeCompleted(Object JavaDoc parent, Object JavaDoc name) {
153         String JavaDoc uri = "";
154         String JavaDoc localName = null;
155         String JavaDoc qualifiedName = "";
156         if (name instanceof QName) {
157             QName qname = (QName) name;
158             uri = qname.getNamespaceURI();
159             localName = qname.getLocalPart();
160             qualifiedName = qname.getQualifiedName();
161         }
162         else {
163             localName = name.toString();
164             qualifiedName = localName;
165         }
166         try {
167             handler.endElement(uri, localName, qualifiedName);
168         }
169         catch (SAXException JavaDoc e) {
170             handleException(e);
171         }
172     }
173
174     protected void handleException(SAXException JavaDoc e) {
175         throw new RuntimeException JavaDoc(e);
176     }
177
178     /* (non-Javadoc)
179      * @see groovy.util.BuilderSupport#createNode(java.lang.Object, java.util.Map, java.lang.Object)
180      */

181     protected Object JavaDoc createNode(Object JavaDoc name, Map JavaDoc attributes) {
182         return createNode(name, attributes, null);
183     }
184 }
185
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