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+/* GnomeTransformerFactory.java -
+ Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.xml.libxmlj.transform;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.parsers.FactoryConfigurationError;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import javax.xml.transform.ErrorListener;
+import javax.xml.transform.Source;
+import javax.xml.transform.Templates;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.URIResolver;
+
+import javax.xml.transform.dom.DOMResult;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.sax.SAXSource;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.XMLReader;
+import org.xml.sax.helpers.DefaultHandler;
+
+import gnu.xml.libxmlj.util.XMLJ;
+
+/**
+ * An implementation of <code>TransformerFactory</code> producing
+ * <code>Transformer</code> objects which use <code>libxslt</code>
+ * for transformation.
+ *
+ * @author Julian Scheid
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+public class GnomeTransformerFactory
+ extends TransformerFactory
+{
+
+ static
+ {
+ XMLJ.init ();
+ }
+
+ /**
+ * URIResolver set by user, or default implementation.
+ */
+ private URIResolver uriResolver;
+
+ /**
+ * ErrorListener set by user, or default implementation.
+ */
+ private ErrorListener errorListener;
+
+ /**
+ * Attributes set by user.
+ */
+ private Map attributes = new HashMap ();
+
+ //--- Implementation of javax.xml.transform.TransformerFactory
+ //--- follows.
+
+ // -- begin getAssociatedStylesheet implementation --
+
+ /**
+ * Returns the stylesheet associated with the specified XML source, or
+ * <code>null</code> if no associated stylesheet could be found.
+ */
+ public Source getAssociatedStylesheet(Source source, String media,
+ String title, String charset)
+ throws TransformerConfigurationException
+ {
+ String href= null;
+ String base = source.getSystemId();
+ if (source instanceof DOMSource)
+ {
+ Node node = ((DOMSource) source).getNode();
+ Document doc = (node.getNodeType() == Node.DOCUMENT_NODE) ?
+ (Document) node : node.getOwnerDocument();
+ if (base == null)
+ {
+ base = doc.getDocumentURI();
+ }
+ for (node = doc.getFirstChild(); node != null;
+ node = node.getNextSibling())
+ {
+ if (node.getNodeType() == Node.PROCESSING_INSTRUCTION_NODE &&
+ "xml-stylesheet".equals(node.getNodeName()))
+ {
+ String data = node.getNodeValue();
+ if (media != null &&
+ !media.equals(parseParameter(data, "type")))
+ {
+ continue;
+ }
+ if (title != null &&
+ !title.equals(parseParameter(data, "title")))
+ {
+ continue;
+ }
+ href = parseParameter(data, "href");
+ }
+ }
+ }
+ else
+ {
+ InputSource input;
+ XMLReader parser = null;
+ try
+ {
+ if (source instanceof SAXSource)
+ {
+ SAXSource sax = (SAXSource) source;
+ input = sax.getInputSource();
+ parser = sax.getXMLReader();
+ }
+ else
+ {
+ StreamSource stream = (StreamSource) source;
+ InputStream in = stream.getInputStream();
+ input = new InputSource(in);
+ }
+ input.setSystemId(base);
+ if (parser == null)
+ {
+ parser = createXMLReader();
+ }
+ AssociatedStylesheetHandler ash =
+ new AssociatedStylesheetHandler();
+ ash.media = media;
+ ash.title = title;
+ parser.setContentHandler(ash);
+ parser.parse(input);
+ href = ash.href;
+ }
+ catch (SAXException e)
+ {
+ throw new TransformerConfigurationException(e);
+ }
+ catch (IOException e)
+ {
+ throw new TransformerConfigurationException(e);
+ }
+ }
+ if (href == null)
+ {
+ return null;
+ }
+ if (base != null)
+ {
+ base = XMLJ.getBaseURI(base);
+ }
+ href = XMLJ.getAbsoluteURI(base, href);
+ return new StreamSource(href);
+ }
+
+ private XMLReader createXMLReader()
+ throws TransformerConfigurationException
+ {
+ try
+ {
+ SAXParserFactory factory = SAXParserFactory.newInstance();
+ SAXParser parser = factory.newSAXParser();
+ return parser.getXMLReader();
+ }
+ catch (FactoryConfigurationError e)
+ {
+ throw new TransformerConfigurationException(e);
+ }
+ catch (ParserConfigurationException e)
+ {
+ throw new TransformerConfigurationException(e);
+ }
+ catch (SAXException e)
+ {
+ throw new TransformerConfigurationException(e);
+ }
+ }
+
+ class AssociatedStylesheetHandler
+ extends DefaultHandler
+ {
+
+ String media;
+ String title;
+ String href;
+
+ public void processingInstruction(String target, String data)
+ throws SAXException
+ {
+ if ("xml-stylesheet".equals(target))
+ {
+ if (media != null && !media.equals(parseParameter(data, "type")))
+ {
+ return;
+ }
+ if (title != null && !title.equals(parseParameter(data, "title")))
+ {
+ return;
+ }
+ href = parseParameter(data, "href");
+ }
+ }
+
+ }
+
+ String parseParameter(String data, String name)
+ {
+ int start = data.indexOf(name + "=");
+ if (start != -1)
+ {
+ start += name.length() + 2;
+ char delim = data.charAt(start - 1);
+ int end = data.indexOf(delim, start);
+ if (end != -1)
+ {
+ return data.substring(start, end);
+ }
+ }
+ return null;
+ }
+
+ // -- end getAssociatedStylesheet implementation --
+
+ public synchronized void setAttribute (String name, Object value)
+ {
+ this.attributes.put (name, value);
+ }
+
+ public synchronized Object getAttribute (String name)
+ {
+ return attributes.get (name);
+ }
+
+ public void setErrorListener (ErrorListener errorListener)
+ {
+ this.errorListener = errorListener;
+ }
+
+ public ErrorListener getErrorListener ()
+ {
+ return errorListener;
+ }
+
+ public void setURIResolver (URIResolver uriResolver)
+ {
+ this.uriResolver = uriResolver;
+ }
+
+ public URIResolver getURIResolver ()
+ {
+ return uriResolver;
+ }
+
+ public boolean getFeature (String name)
+ {
+ return (StreamSource.FEATURE.equals (name) ||
+ StreamResult.FEATURE.equals (name) ||
+ DOMSource.FEATURE.equals (name) ||
+ DOMResult.FEATURE.equals (name));
+ }
+
+ public void setFeature(String name, boolean value)
+ throws TransformerConfigurationException
+ {
+ throw new TransformerConfigurationException(name);
+ }
+
+ /**
+ * Returns a new instance of class {@link Transformer} for a
+ * null souce.
+ */
+ public Transformer newTransformer ()
+ throws TransformerConfigurationException
+ {
+ return newTransformer (null);
+ }
+
+ /**
+ * Returns a new instance of class {@link Transformer} for
+ * the given souce.
+ */
+ public Transformer newTransformer (Source source)
+ throws TransformerConfigurationException
+ {
+ return new GnomeTransformer (source, uriResolver, errorListener);
+ }
+
+ /**
+ * Returns a new instance of class {@link Templates} for
+ * the given souce.
+ */
+ public Templates newTemplates (Source source)
+ throws TransformerConfigurationException
+ {
+ return new GnomeTransformer (source, uriResolver, errorListener);
+ }
+
+ /**
+ * Perform native cleanup.
+ */
+ public static native void freeLibxsltGlobal ();
+
+}