| /* 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 (); |
| |
| } |