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- /*
- * $Id: TraxInputHandler.java,v 1.6 2003/02/27 10:13:04 jeremias Exp $
- * ============================================================================
- * The Apache Software License, Version 1.1
- * ============================================================================
- *
- * Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modifica-
- * tion, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * 3. The end-user documentation included with the redistribution, if any, must
- * include the following acknowledgment: "This product includes software
- * developed by the Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself, if
- * and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "FOP" and "Apache Software Foundation" must not be used to
- * endorse or promote products derived from this software without prior
- * written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache", nor may
- * "Apache" appear in their name, without prior written permission of the
- * Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
- * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * ============================================================================
- *
- * This software consists of voluntary contributions made by many individuals
- * on behalf of the Apache Software Foundation and was originally created by
- * James Tauber <jtauber@jtauber.com>. For more information on the Apache
- * Software Foundation, please see <http://www.apache.org/>.
- */
- package org.apache.fop.apps;
-
- // Imported java.io classes
- import java.io.File;
-
- // Imported TraX classes
- import javax.xml.transform.TransformerFactory;
- import javax.xml.transform.stream.StreamSource;
- import javax.xml.transform.sax.SAXResult;
- import javax.xml.transform.sax.SAXSource;
- import javax.xml.transform.sax.SAXTransformerFactory;
-
- // Imported SAX classes
- import org.xml.sax.InputSource;
- import org.xml.sax.XMLReader;
- import org.xml.sax.XMLFilter;
-
- /**
- * XSLTInputHandler basically takes an XML file and transforms it with an
- * XSLT file and the resulting XSL-FO document is input for FOP.
- */
- public class TraxInputHandler extends InputHandler {
-
- private File xmlfile, xsltfile;
-
- /**
- * Main constructor
- * @param xmlfile XML file
- * @param xsltfile XSLT file
- */
- public TraxInputHandler(File xmlfile, File xsltfile) {
- this.xmlfile = xmlfile;
- this.xsltfile = xsltfile;
- }
-
- /**
- * @see org.apache.fop.apps.InputHandler#getInputSource()
- */
- public InputSource getInputSource() {
- return fileInputSource(xmlfile);
- }
-
- /**
- * Overwrites this method of the super class and returns an XMLFilter
- * instead of a simple XMLReader which allows chaining of transformations.
- * @see org.apache.fop.apps.InputHandler#getParser()
- */
- public XMLReader getParser() throws FOPException {
- return this.getXMLFilter(xmlfile, xsltfile);
- }
-
- /**
- * Creates from the transformer an instance of an XMLFilter which
- * then can be used in a chain with the XMLReader passed to Driver. This way
- * during the conversion of the xml file + xslt stylesheet the resulting
- * data is fed into Fop. This should help to avoid memory problems
- * @param xmlfile The xmlfile containing the text data
- * @param xsltfile An xslt stylesheet
- * @return an XMLFilter which can be chained together with other
- * XMLReaders or XMLFilters
- * @throws FOPException if setting up the XMLFilter fails
- */
- public static XMLFilter getXMLFilter(File xmlfile,
- File xsltfile) throws FOPException {
- try {
- // Instantiate a TransformerFactory.
- TransformerFactory tFactory = TransformerFactory.newInstance();
- // Determine whether the TransformerFactory supports The use uf SAXSource
- // and SAXResult
- if (tFactory.getFeature(SAXSource.FEATURE)
- && tFactory.getFeature(SAXResult.FEATURE)) {
- // Cast the TransformerFactory to SAXTransformerFactory.
- SAXTransformerFactory saxTFactory =
- ((SAXTransformerFactory)tFactory);
- // Create an XMLFilter for each stylesheet.
- XMLFilter xmlfilter =
- saxTFactory.newXMLFilter(new StreamSource(xsltfile));
-
- // Create an XMLReader.
- XMLReader parser = createParser();
- if (parser == null) {
- throw new FOPException("Unable to create SAX parser");
- }
-
- // xmlFilter1 uses the XMLReader as its reader.
- xmlfilter.setParent(parser);
- return xmlfilter;
- } else {
- throw new FOPException("Your parser doesn't support the "
- + "features SAXSource and SAXResult."
- + "\nMake sure you are using an XSLT engine which "
- + "supports TrAX");
- }
- } catch (FOPException fe) {
- throw fe;
- } catch (Exception ex) {
- throw new FOPException(ex);
- }
- }
-
- }
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