001 /* 002 $Id: DOMBuilder.java,v 1.6 2004/05/23 20:05:25 spullara Exp $ 003 004 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 package groovy.xml; 047 048 import groovy.util.BuilderSupport; 049 050 import java.io.IOException; 051 import java.io.Reader; 052 import java.security.AccessController; 053 import java.security.PrivilegedActionException; 054 import java.security.PrivilegedExceptionAction; 055 import java.util.Iterator; 056 import java.util.Map; 057 058 import javax.xml.parsers.DocumentBuilder; 059 import javax.xml.parsers.DocumentBuilderFactory; 060 import javax.xml.parsers.FactoryConfigurationError; 061 import javax.xml.parsers.ParserConfigurationException; 062 063 import org.w3c.dom.Document; 064 import org.w3c.dom.Element; 065 import org.w3c.dom.Node; 066 import org.xml.sax.InputSource; 067 import org.xml.sax.SAXException; 068 069 /** 070 * A helper class for creating a W3C DOM tree 071 * 072 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> 073 * @version $Revision: 1.6 $ 074 */ 075 public class DOMBuilder extends BuilderSupport { 076 077 Document document; 078 DocumentBuilder documentBuilder; 079 080 public static DOMBuilder newInstance() throws ParserConfigurationException, FactoryConfigurationError { 081 DocumentBuilder documentBuilder = null; 082 try { 083 documentBuilder = (DocumentBuilder) AccessController.doPrivileged(new PrivilegedExceptionAction() { 084 public Object run() throws ParserConfigurationException { 085 return DocumentBuilderFactory.newInstance().newDocumentBuilder(); 086 } 087 }); 088 } catch (PrivilegedActionException pae) { 089 Exception e = pae.getException(); 090 if (e instanceof ParserConfigurationException) { 091 throw (ParserConfigurationException) e; 092 } else { 093 throw new RuntimeException(e); 094 } 095 } 096 return new DOMBuilder(documentBuilder); 097 } 098 099 public static Document parse(Reader reader) throws SAXException, IOException, ParserConfigurationException { 100 DocumentBuilder documentBuilder = null; 101 try { 102 documentBuilder = (DocumentBuilder) AccessController.doPrivileged(new PrivilegedExceptionAction() { 103 public Object run() throws ParserConfigurationException { 104 return DocumentBuilderFactory.newInstance().newDocumentBuilder(); 105 } 106 }); 107 } catch (PrivilegedActionException pae) { 108 Exception e = pae.getException(); 109 if (e instanceof ParserConfigurationException) { 110 throw (ParserConfigurationException) e; 111 } else { 112 throw new RuntimeException(e); 113 } 114 } 115 return documentBuilder.parse(new InputSource(reader)); 116 } 117 118 public DOMBuilder(Document document) { 119 this.document = document; 120 } 121 122 public DOMBuilder(DocumentBuilder documentBuilder) { 123 this.documentBuilder = documentBuilder; 124 } 125 126 protected void setParent(Object parent, Object child) { 127 Node current = (Node) parent; 128 Node node = (Node) child; 129 130 current.appendChild(node); 131 } 132 133 protected Object createNode(Object name) { 134 if (document == null) { 135 document = createDocument(); 136 } 137 if (name instanceof QName) { 138 QName qname = (QName) name; 139 return document.createElementNS(qname.getNamespaceURI(), qname.getQualifiedName()); 140 } 141 else { 142 return document.createElement(name.toString()); 143 } 144 } 145 146 protected Document createDocument() { 147 if (documentBuilder == null) { 148 throw new IllegalArgumentException("No Document or DOMImplementation available so cannot create Document"); 149 } 150 else { 151 return documentBuilder.newDocument(); 152 } 153 } 154 155 protected Object createNode(Object name, Object value) { 156 Element element = (Element) createNode(name); 157 element.appendChild(document.createTextNode(value.toString())); 158 return element; 159 } 160 161 protected Object createNode(Object name, Map attributes, Object value) { 162 Element element = (Element) createNode(name, attributes); 163 element.appendChild(document.createTextNode(value.toString())); 164 return element; 165 } 166 167 protected Object createNode(Object name, Map attributes) { 168 Element element = (Element) createNode(name); 169 for (Iterator iter = attributes.entrySet().iterator(); iter.hasNext();) { 170 Map.Entry entry = (Map.Entry) iter.next(); 171 String attrName = entry.getKey().toString(); 172 Object value = entry.getValue(); 173 if ("xmlns".equals(attrName)) { 174 if (value instanceof Map) { 175 appendNamespaceAttributes(element, (Map) value); 176 } 177 else { 178 throw new IllegalArgumentException("The value of the xmlns attribute must be a Map of QNames to String URIs"); 179 } 180 } 181 else { 182 element.setAttribute(attrName, value.toString()); 183 } 184 } 185 return element; 186 } 187 188 protected void appendNamespaceAttributes(Element element, Map attributes) { 189 for (Iterator iter = attributes.entrySet().iterator(); iter.hasNext();) { 190 Map.Entry entry = (Map.Entry) iter.next(); 191 Object key = entry.getKey(); 192 Object value = entry.getValue(); 193 if (value == null) { 194 throw new IllegalArgumentException("The value of key: " + key + " cannot be null"); 195 } 196 if (key instanceof String) { 197 String prefix = (String) key; 198 199 //System.out.println("Creating namespace for prefix: " + prefix + " with value: " + value); 200 201 //element.setAttributeNS("http://www.w3.org/XML/1998/namespace", "xmlns:" + prefix, value.toString()); 202 element.setAttributeNS("", prefix, value.toString()); 203 } 204 else if (key instanceof QName) { 205 QName qname = (QName) key; 206 element.setAttributeNS(qname.getNamespaceURI(), qname.getQualifiedName(), value.toString()); 207 } 208 else { 209 throw new IllegalArgumentException("The key: " + key + " should be an instanceof of " + QName.class); 210 } 211 } 212 } 213 }