001: /*--
002:
003: $Id: JAXPDOMAdapter.java,v 1.1 2005/04/27 09:32:42 wittek Exp $
004:
005: Copyright (C) 2000-2004 Jason Hunter & Brett McLaughlin.
006: All rights reserved.
007:
008: Redistribution and use in source and binary forms, with or without
009: modification, are permitted provided that the following conditions
010: are met:
011:
012: 1. Redistributions of source code must retain the above copyright
013: notice, this list of conditions, and the following disclaimer.
014:
015: 2. Redistributions in binary form must reproduce the above copyright
016: notice, this list of conditions, and the disclaimer that follows
017: these conditions in the documentation and/or other materials
018: provided with the distribution.
019:
020: 3. The name "JDOM" must not be used to endorse or promote products
021: derived from this software without prior written permission. For
022: written permission, please contact <request_AT_jdom_DOT_org>.
023:
024: 4. Products derived from this software may not be called "JDOM", nor
025: may "JDOM" appear in their name, without prior written permission
026: from the JDOM Project Management <request_AT_jdom_DOT_org>.
027:
028: In addition, we request (but do not require) that you include in the
029: end-user documentation provided with the redistribution and/or in the
030: software itself an acknowledgement equivalent to the following:
031: "This product includes software developed by the
032: JDOM Project (http://www.jdom.org/)."
033: Alternatively, the acknowledgment may be graphical using the logos
034: available at http://www.jdom.org/images/logos.
035:
036: THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: DISCLAIMED. IN NO EVENT SHALL THE JDOM AUTHORS OR THE PROJECT
040: CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: SUCH DAMAGE.
048:
049: This software consists of voluntary contributions made by many
050: individuals on behalf of the JDOM Project and was originally
051: created by Jason Hunter <jhunter_AT_jdom_DOT_org> and
052: Brett McLaughlin <brett_AT_jdom_DOT_org>. For more information
053: on the JDOM Project, please see <http://www.jdom.org/>.
054:
055: */
056:
057: package org.jdom.adapters;
058:
059: import java.io.*;
060: import java.lang.reflect.*;
061:
062: import org.jdom.*;
063: import org.jdom.input.*;
064: import org.w3c.dom.Document;
065:
066: /**
067: * An adapter for any parser supporting the Sun JAXP APIs.
068: *
069: * @version $Revision: 1.1 $, $Date: 2005/04/27 09:32:42 $
070: * @author Jason Hunter
071: */
072: public class JAXPDOMAdapter extends AbstractDOMAdapter {
073:
074: private static final String CVS_ID = "@(#) $RCSfile: JAXPDOMAdapter.java,v $ $Revision: 1.1 $ $Date: 2005/04/27 09:32:42 $ $Name: $";
075:
076: /**
077: * This creates a new <code>{@link Document}</code> from an
078: * existing <code>InputStream</code> by letting a JAXP
079: * parser handle parsing using the supplied stream.
080: *
081: * @param in <code>InputStream</code> to parse.
082: * @param validate <code>boolean</code> to indicate if validation
083: * should occur.
084: * @return <code>Document</code> - instance ready for use.
085: * @throws IOException when I/O error occurs.
086: * @throws JDOMException when errors occur in parsing.
087: */
088: public Document getDocument(InputStream in, boolean validate)
089: throws IOException, JDOMException {
090:
091: try {
092: // Try using JAXP...
093: // Note we need DOM Level 2 and thus JAXP 1.1.
094: Class.forName("javax.xml.transform.Transformer");
095:
096: // Try JAXP 1.1 calls to build the document
097: Class factoryClass = Class
098: .forName("javax.xml.parsers.DocumentBuilderFactory");
099:
100: // factory = DocumentBuilderFactory.newInstance();
101: Method newParserInstance = factoryClass.getMethod(
102: "newInstance", null);
103: Object factory = newParserInstance.invoke(null, null);
104:
105: // factory.setValidating(validate);
106: Method setValidating = factoryClass.getMethod(
107: "setValidating", new Class[] { boolean.class });
108: setValidating.invoke(factory, new Object[] { new Boolean(
109: validate) });
110:
111: // factory.setNamespaceAware(true);
112: Method setNamespaceAware = factoryClass.getMethod(
113: "setNamespaceAware", new Class[] { boolean.class });
114: setNamespaceAware.invoke(factory,
115: new Object[] { Boolean.TRUE });
116:
117: // jaxpParser = factory.newDocumentBuilder();
118: Method newDocBuilder = factoryClass.getMethod(
119: "newDocumentBuilder", null);
120: Object jaxpParser = newDocBuilder.invoke(factory, null);
121:
122: // jaxpParser.setErrorHandler(null);
123: Class parserClass = jaxpParser.getClass();
124: Method setErrorHandler = parserClass.getMethod(
125: "setErrorHandler",
126: new Class[] { org.xml.sax.ErrorHandler.class });
127: setErrorHandler.invoke(jaxpParser,
128: new Object[] { new BuilderErrorHandler() });
129:
130: // domDoc = jaxpParser.parse(in);
131: Method parse = parserClass.getMethod("parse",
132: new Class[] { InputStream.class });
133: org.w3c.dom.Document domDoc = (org.w3c.dom.Document) parse
134: .invoke(jaxpParser, new Object[] { in });
135:
136: return domDoc;
137: } catch (InvocationTargetException e) {
138: Throwable targetException = e.getTargetException();
139: if (targetException instanceof IOException) {
140: throw (IOException) targetException;
141: } else {
142: throw new JDOMException(targetException.getMessage(),
143: targetException);
144: }
145: } catch (Exception e) {
146: throw new JDOMException(
147: "Reflection failed while parsing a document with JAXP",
148: e);
149: }
150:
151: // Allow all exceptions to pass through
152: }
153:
154: /**
155: * This creates an empty <code>Document</code> object based
156: * on a specific parser implementation.
157: *
158: * @return <code>Document</code> - created DOM Document.
159: * @throws JDOMException when errors occur in parsing.
160: */
161: public Document createDocument() throws JDOMException {
162:
163: try {
164: // We need DOM Level 2 and thus JAXP 1.1.
165: // If JAXP 1.0 is all that's available then we error out.
166: Class.forName("javax.xml.transform.Transformer");
167:
168: // Try JAXP 1.1 calls to build the document
169: Class factoryClass = Class
170: .forName("javax.xml.parsers.DocumentBuilderFactory");
171:
172: // factory = DocumentBuilderFactory.newInstance();
173: Method newParserInstance = factoryClass.getMethod(
174: "newInstance", null);
175: Object factory = newParserInstance.invoke(null, null);
176:
177: // jaxpParser = factory.newDocumentBuilder();
178: Method newDocBuilder = factoryClass.getMethod(
179: "newDocumentBuilder", null);
180: Object jaxpParser = newDocBuilder.invoke(factory, null);
181:
182: // domDoc = jaxpParser.newDocument();
183: Class parserClass = jaxpParser.getClass();
184: Method newDoc = parserClass.getMethod("newDocument", null);
185: org.w3c.dom.Document domDoc = (org.w3c.dom.Document) newDoc
186: .invoke(jaxpParser, null);
187:
188: return domDoc;
189: } catch (Exception e) {
190: throw new JDOMException(
191: "Reflection failed while creating new JAXP document",
192: e);
193: }
194:
195: }
196: }
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