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From-SVN: r102074
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Tom Tromey
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345
libjava/classpath/gnu/xml/transform/TransformerFactoryImpl.java
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libjava/classpath/gnu/xml/transform/TransformerFactoryImpl.java
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/* TransformerFactoryImpl.java --
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.xml.transform;
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import java.io.IOException;
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import java.net.URL;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.LinkedList;
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import java.util.Map;
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import java.util.Properties;
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import javax.xml.transform.ErrorListener;
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import javax.xml.transform.Source;
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import javax.xml.transform.Templates;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerConfigurationException;
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import javax.xml.transform.TransformerException;
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.URIResolver;
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import javax.xml.transform.dom.DOMResult;
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import javax.xml.transform.dom.DOMSource;
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import javax.xml.transform.sax.SAXResult;
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import javax.xml.transform.sax.SAXSource;
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import javax.xml.transform.stream.StreamResult;
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import javax.xml.transform.stream.StreamSource;
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import javax.xml.xpath.XPathFactory;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import gnu.xml.dom.DomDocument;
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/**
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* GNU transformer factory implementation.
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*
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* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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*/
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public class TransformerFactoryImpl
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extends TransformerFactory
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{
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final XPathFactory xpathFactory;
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final XSLURIResolver resolver;
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ErrorListener userListener;
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URIResolver userResolver;
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public TransformerFactoryImpl()
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{
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xpathFactory = new gnu.xml.xpath.XPathFactoryImpl();
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resolver = new XSLURIResolver();
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}
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public Transformer newTransformer(Source source)
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throws TransformerConfigurationException
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{
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Stylesheet stylesheet = newStylesheet(source, 0, null);
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Properties outputProperties =
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new TransformerOutputProperties(stylesheet);
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TransformerImpl transformer =
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new TransformerImpl(this, stylesheet, outputProperties);
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stylesheet.transformer = transformer;
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return transformer;
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}
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public Transformer newTransformer()
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throws TransformerConfigurationException
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{
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return new TransformerImpl(this, null, new Properties());
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}
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public Templates newTemplates(Source source)
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throws TransformerConfigurationException
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{
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Stylesheet stylesheet = newStylesheet(source, 0, null);
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return new TemplatesImpl(this, stylesheet);
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}
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Stylesheet newStylesheet(Source source, int precedence, Stylesheet parent)
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throws TransformerConfigurationException
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{
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Document doc = null;
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String systemId = null;
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if (source != null)
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{
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try
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{
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DOMSource ds;
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synchronized (resolver)
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{
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resolver.setUserResolver(userResolver);
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resolver.setUserListener(userListener);
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ds = resolver.resolveDOM(source, null, null);
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}
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Node node = ds.getNode();
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if (node == null)
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{
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throw new TransformerConfigurationException("no source document");
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}
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doc = (node instanceof Document) ? (Document) node :
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node.getOwnerDocument();
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systemId = ds.getSystemId();
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}
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catch (TransformerException e)
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{
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throw new TransformerConfigurationException(e);
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}
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}
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return new Stylesheet(this, parent, doc, systemId, precedence);
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}
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public Source getAssociatedStylesheet(Source source,
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String media,
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String title,
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String charset)
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throws TransformerConfigurationException
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{
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try
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{
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DOMSource ds;
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synchronized (resolver)
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{
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resolver.setUserResolver(userResolver);
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resolver.setUserListener(userListener);
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ds = resolver.resolveDOM(source, null, null);
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}
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Node node = ds.getNode();
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if (node == null)
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{
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throw new TransformerConfigurationException("no source document");
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}
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Document doc = (node instanceof Document) ? (Document) node :
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node.getOwnerDocument();
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LinkedList matches = new LinkedList();
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for (node = doc.getFirstChild();
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node != null;
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node = node.getNextSibling())
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{
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if (node.getNodeType() == Node.PROCESSING_INSTRUCTION_NODE &&
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"xml-stylesheet".equals(node.getNodeName()))
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{
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Map params = parseParameters(node.getNodeValue());
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if (media != null && !media.equals(params.get("media")))
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{
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continue;
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}
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if (title != null && !title.equals(params.get("title")))
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{
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continue;
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}
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if (charset != null && !charset.equals(params.get("charset")))
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{
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continue;
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}
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String href = (String) params.get("href");
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URL url = resolver.resolveURL(null, node.getBaseURI(), href);
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matches.add(url);
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}
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}
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switch (matches.size())
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{
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case 0:
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return null;
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case 1:
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return new StreamSource(((URL) matches.getFirst()).toString());
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default:
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// Create a source representing a stylesheet with a list of
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// imports
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DomDocument ssDoc = new DomDocument();
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ssDoc.setBuilding(true);
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// Create document element
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Node root =
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ssDoc.createElementNS(Stylesheet.XSL_NS, "stylesheet");
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Node version =
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ssDoc.createAttributeNS(null, "version");
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version.setNodeValue("1.0");
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root.getAttributes().setNamedItemNS(version);
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ssDoc.appendChild(root);
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// Create xsl:import for each URL
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for (Iterator i = matches.iterator(); i.hasNext(); )
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{
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URL url = (URL) i.next();
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Node imp =
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ssDoc.createElementNS(Stylesheet.XSL_NS, "import");
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Node href =
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ssDoc.createAttributeNS(null, "href");
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href.setNodeValue(url.toString());
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imp.getAttributes().setNamedItemNS(href);
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root.appendChild(imp);
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}
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ssDoc.setBuilding(false);
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return new DOMSource(ssDoc);
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}
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}
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catch (IOException e)
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{
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throw new TransformerConfigurationException(e);
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}
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catch (TransformerException e)
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{
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throw new TransformerConfigurationException(e);
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}
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}
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Map parseParameters(String data)
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{
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Map ret = new LinkedHashMap();
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int len = data.length();
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String key = null;
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int start = 0;
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char quoteChar = '\u0000';
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for (int i = 0; i < len; i++)
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{
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char c = data.charAt(i);
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if (quoteChar == '\u0000' && c == ' ')
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{
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if (key == null && start < i)
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{
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key = data.substring(start, i);
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}
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else
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{
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String val = unquote(data.substring(start, i).trim());
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ret.put(key, val);
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key = null;
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}
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start = i + 1;
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}
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else if (c == '"')
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{
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quoteChar = (quoteChar == c) ? '\u0000' : c;
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}
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else if (c == '\'')
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{
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quoteChar = (quoteChar == c) ? '\u0000' : c;
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}
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}
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if (start < len && key != null)
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{
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String val = unquote(data.substring(start, len).trim());
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ret.put(key, val);
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}
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return ret;
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}
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String unquote(String text)
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{
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int end = text.length() - 1;
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if (text.charAt(0) == '\'' && text.charAt(end) == '\'')
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{
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return text.substring(1, end);
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}
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if (text.charAt(0) == '"' && text.charAt(end) == '"')
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{
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return text.substring(1, end);
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}
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return text;
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}
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public void setURIResolver(URIResolver resolver)
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{
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userResolver = resolver;
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}
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public URIResolver getURIResolver()
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{
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return userResolver;
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}
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public void setFeature(String name, boolean value)
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throws TransformerConfigurationException
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{
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throw new TransformerConfigurationException("not supported");
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}
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public boolean getFeature(String name)
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{
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if (SAXSource.FEATURE.equals(name) ||
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SAXResult.FEATURE.equals(name) ||
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StreamSource.FEATURE.equals(name) ||
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StreamResult.FEATURE.equals(name) ||
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DOMSource.FEATURE.equals(name) ||
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DOMResult.FEATURE.equals(name))
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{
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return true;
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}
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return false;
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}
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public void setAttribute(String name, Object value)
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throws IllegalArgumentException
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{
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throw new IllegalArgumentException("not supported");
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}
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public Object getAttribute(String name)
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throws IllegalArgumentException
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{
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throw new IllegalArgumentException("not supported");
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}
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public void setErrorListener(ErrorListener listener)
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throws IllegalArgumentException
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{
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userListener = listener;
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}
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public ErrorListener getErrorListener()
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{
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return userListener;
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}
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}
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