001 /* 002 $Id: DOMBuilder.java 4132 2006-10-18 08:24:58Z paulk $ 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.util.Iterator; 053 import java.util.Map; 054 055 import javax.xml.parsers.DocumentBuilder; 056 import javax.xml.parsers.DocumentBuilderFactory; 057 import javax.xml.parsers.ParserConfigurationException; 058 059 import org.w3c.dom.Document; 060 import org.w3c.dom.Element; 061 import org.w3c.dom.Node; 062 import org.xml.sax.InputSource; 063 import org.xml.sax.SAXException; 064 065 /** 066 * A helper class for creating a W3C DOM tree 067 * 068 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a> 069 * @version $Revision: 4132 $ 070 */ 071 public class DOMBuilder extends BuilderSupport { 072 073 Document document; 074 DocumentBuilder documentBuilder; 075 076 public static DOMBuilder newInstance() throws ParserConfigurationException { 077 return newInstance(false, true); 078 } 079 080 public static DOMBuilder newInstance(boolean validating, boolean namespaceAware) throws ParserConfigurationException { 081 DocumentBuilderFactory factory = FactorySupport.createDocumentBuilderFactory(); 082 factory.setNamespaceAware(namespaceAware); 083 factory.setValidating(validating); 084 return new DOMBuilder(factory.newDocumentBuilder()); 085 } 086 087 public static Document parse(Reader reader) throws SAXException, IOException, ParserConfigurationException { 088 return parse(reader, false, true); 089 } 090 091 public static Document parse(Reader reader, boolean validating, boolean namespaceAware) 092 throws SAXException, IOException, ParserConfigurationException { 093 DocumentBuilderFactory factory = FactorySupport.createDocumentBuilderFactory(); 094 factory.setNamespaceAware(namespaceAware); 095 factory.setValidating(validating); 096 DocumentBuilder documentBuilder = factory.newDocumentBuilder(); 097 return documentBuilder.parse(new InputSource(reader)); 098 } 099 100 public DOMBuilder(Document document) { 101 this.document = document; 102 } 103 104 public DOMBuilder(DocumentBuilder documentBuilder) { 105 this.documentBuilder = documentBuilder; 106 } 107 108 protected void setParent(Object parent, Object child) { 109 Node current = (Node) parent; 110 Node node = (Node) child; 111 112 current.appendChild(node); 113 } 114 115 protected Object createNode(Object name) { 116 if (document == null) { 117 document = createDocument(); 118 } 119 if (name instanceof QName) { 120 QName qname = (QName) name; 121 return document.createElementNS(qname.getNamespaceURI(), qname.getQualifiedName()); 122 } else { 123 return document.createElement(name.toString()); 124 } 125 } 126 127 protected Document createDocument() { 128 if (documentBuilder == null) { 129 throw new IllegalArgumentException("No Document or DOMImplementation available so cannot create Document"); 130 } else { 131 return documentBuilder.newDocument(); 132 } 133 } 134 135 protected Object createNode(Object name, Object value) { 136 Element element = (Element) createNode(name); 137 element.appendChild(document.createTextNode(value.toString())); 138 return element; 139 } 140 141 protected Object createNode(Object name, Map attributes, Object value) { 142 Element element = (Element) createNode(name, attributes); 143 element.appendChild(document.createTextNode(value.toString())); 144 return element; 145 } 146 147 protected Object createNode(Object name, Map attributes) { 148 Element element = (Element) createNode(name); 149 for (Iterator iter = attributes.entrySet().iterator(); iter.hasNext();) { 150 Map.Entry entry = (Map.Entry) iter.next(); 151 String attrName = entry.getKey().toString(); 152 Object value = entry.getValue(); 153 if ("xmlns".equals(attrName)) { 154 if (value instanceof Map) { 155 appendNamespaceAttributes(element, (Map) value); 156 } else { 157 throw new IllegalArgumentException("The value of the xmlns attribute must be a Map of QNames to String URIs"); 158 } 159 } else { 160 // TODO handle null values and treat as '' 161 element.setAttribute(attrName, value.toString()); 162 } 163 } 164 return element; 165 } 166 167 protected void appendNamespaceAttributes(Element element, Map attributes) { 168 for (Iterator iter = attributes.entrySet().iterator(); iter.hasNext();) { 169 Map.Entry entry = (Map.Entry) iter.next(); 170 Object key = entry.getKey(); 171 Object value = entry.getValue(); 172 if (value == null) { 173 throw new IllegalArgumentException("The value of key: " + key + " cannot be null"); 174 } 175 if (key instanceof String) { 176 String prefix = (String) key; 177 178 //System.out.println("Creating namespace for prefix: " + prefix + " with value: " + value); 179 180 //element.setAttributeNS("http://www.w3.org/XML/1998/namespace", "xmlns:" + prefix, value.toString()); 181 element.setAttributeNS("", prefix, value.toString()); 182 } else if (key instanceof QName) { 183 QName qname = (QName) key; 184 element.setAttributeNS(qname.getNamespaceURI(), qname.getQualifiedName(), value.toString()); 185 } else { 186 throw new IllegalArgumentException("The key: " + key + " should be an instanceof of " + QName.class); 187 } 188 } 189 } 190 }