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1 /* 2 * Copyright (c) 2003 Scott Howlett & Paul Libbrecht. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * 3. The end-user documentation included with the redistribution, 18 * if any, must include the following acknowledgment: 19 * "This product includes software developed by the Xwing 20 * Project ( http://xwing.sourceforge.net/ )." 21 * Alternately, this acknowledgment may appear in the software itself, 22 * if and wherever such third-party acknowledgments normally appear. 23 * 24 * 4. The name "Xwing" must not be used to endorse or promote products 25 * derived from this software without prior written permission. For 26 * written permission, please contact the project authors via 27 * the Xwing project site, http://xwing.sourceforge.net/ . 28 * 29 * 5. Products derived from this software may not be called "Xwing", 30 * nor may "Xwing" appear in their name, without prior written 31 * permission of the Xwing project. 32 * 33 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 34 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 35 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 36 * DISCLAIMED. IN NO EVENT SHALL THE XWING AUTHORS OR THE PROJECT 37 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 38 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 39 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 40 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 41 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 42 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 43 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44 * SUCH DAMAGE. 45 * 46 * For more information on Xwing, please see 47 * < http://xwing.sourceforge.net/ >. 48 */ 49 50 package net.sourceforge.xwing.jelly.tags.dom; 51 52 import java.io.File; 53 import java.io.InputStream; 54 import java.net.URL; 55 56 import javax.xml.parsers.DocumentBuilderFactory; 57 import javax.xml.transform.dom.DOMResult; 58 import javax.xml.transform.sax.SAXTransformerFactory; 59 import javax.xml.transform.sax.TransformerHandler; 60 61 import net.sourceforge.xwing.dom.DomUtils; 62 63 import org.apache.commons.beanutils.BasicDynaBean; 64 import org.apache.commons.beanutils.BasicDynaClass; 65 import org.apache.commons.beanutils.DynaClass; 66 import org.apache.commons.beanutils.DynaProperty; 67 import org.apache.commons.jelly.DynaBeanTagSupport; 68 import org.apache.commons.jelly.JellyTagException; 69 import org.apache.commons.jelly.MissingAttributeException; 70 import org.apache.commons.jelly.XMLOutput; 71 import org.w3c.dom.Document; 72 73 //DynaBeanTagSupport is the only working way to get 74 //the "xml" attribute without going through unnecessary 75 //and destructive BeanUtils conversions. 76 77 public class ParseTag extends DynaBeanTagSupport { 78 79 private static DynaClass attribClass = 80 new BasicDynaClass( 81 "Attributes", 82 null, 83 new DynaProperty[] { 84 new DynaProperty("var", String.class), 85 new DynaProperty("xml", Object.class), 86 new DynaProperty("validate", Boolean.class), 87 new DynaProperty("text", String.class)}); 88 89 private static DocumentBuilderFactory dbf; 90 91 public ParseTag() { 92 super(new BasicDynaBean(attribClass)); 93 } 94 95 public void doTag(XMLOutput output) 96 throws MissingAttributeException, JellyTagException { 97 98 String var = (String) getDynaBean().get("var"); 99 100 if (var == null) { 101 throw new MissingAttributeException("var"); 102 } 103 104 try { 105 context.setVariable(var, getXmlDocument()); 106 } catch (Exception exc) { 107 throw new JellyTagException(exc); 108 } 109 } 110 111 protected Document getXmlDocument() throws JellyTagException { 112 Document document = null; 113 Object xml = getDynaBean().get("xml"); 114 115 if (xml == null) { 116 117 String text = (String) getDynaBean().get("text"); 118 if (text != null) { 119 document = parseText(text); 120 } else { 121 document = parseBody(); 122 } 123 } else { 124 document = parse(xml); 125 } 126 127 return document; 128 } 129 130 protected Document parseBody() throws JellyTagException { 131 try { 132 SAXTransformerFactory factory = 133 (SAXTransformerFactory) SAXTransformerFactory.newInstance(); 134 135 TransformerHandler handler = factory.newTransformerHandler(); 136 Document result = DomUtils.newDocument(); 137 handler.setResult(new DOMResult(result)); 138 139 XMLOutput output = new XMLOutput(handler); 140 141 output.startDocument(); 142 invokeBody(output); 143 output.endDocument(); 144 145 return result; 146 147 } catch (Exception exc) { 148 throw new JellyTagException(exc); 149 } 150 } 151 152 protected Document parseText(String text) throws JellyTagException { 153 try { 154 return DomUtils.parseText(text); 155 } catch (Exception e) { 156 throw new JellyTagException(e); 157 } 158 } 159 160 protected Document parse(Object source) throws JellyTagException { 161 try { 162 163 if (source instanceof String) { 164 source = context.getResource((String) source); 165 } 166 167 if (source instanceof URL) { 168 return DomUtils.parse(((URL) source).openStream()); 169 } else if (source instanceof File) { 170 return DomUtils.parse((File) source); 171 } else if (source instanceof InputStream) { 172 return DomUtils.parse((InputStream) source); 173 } else { 174 throw new IllegalArgumentException( 175 "Invalid source argument. Must be a String," 176 + " InputStream or URL." 177 + " Was type; " 178 + source.getClass().getName() 179 + " with value: " 180 + source); 181 } 182 } catch (Exception e) { 183 throw new JellyTagException(e); 184 } 185 } 186 }

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