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- /*
- * Copyright 1999-2005 The Apache Software Foundation.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- /* $Id$ */
-
- package org.apache.fop.cli;
-
- // Imported java.io classes
- import java.io.File;
- import java.io.OutputStream;
- import java.util.Vector;
-
- // Imported TraX classes
- import javax.xml.transform.ErrorListener;
- import javax.xml.transform.Result;
- import javax.xml.transform.Source;
- import javax.xml.transform.Transformer;
- import javax.xml.transform.TransformerException;
- import javax.xml.transform.TransformerFactory;
- import javax.xml.transform.sax.SAXResult;
- import javax.xml.transform.stream.StreamResult;
- import javax.xml.transform.stream.StreamSource;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- import org.apache.fop.apps.FOPException;
- import org.apache.fop.apps.FOUserAgent;
- import org.apache.fop.apps.Fop;
- import org.apache.fop.render.awt.viewer.Renderable;
-
- /**
- * Class for handling files input from command line
- * either with XML and XSLT files (and optionally xsl
- * parameters) or FO File input alone
- */
- public class InputHandler implements ErrorListener, Renderable {
-
- private File sourcefile = null; // either FO or XML/XSLT usage
- private File stylesheet = null; // for XML/XSLT usage
- private Vector xsltParams = null; // for XML/XSLT usage
-
- /** the logger */
- protected Log log = LogFactory.getLog(InputHandler.class);
-
- /**
- * Constructor for XML->XSLT->FO input
- * @param xmlfile XML file
- * @param xsltfile XSLT file
- * @param params Vector of command-line parameters (name, value,
- * name, value, ...) for XSL stylesheet, null if none
- */
- public InputHandler(File xmlfile, File xsltfile, Vector params) {
- sourcefile = xmlfile;
- stylesheet = xsltfile;
- xsltParams = params;
- }
-
- /**
- * Constructor for FO input
- * @param fofile the file to read the FO document.
- */
- public InputHandler(File fofile) {
- sourcefile = fofile;
- }
-
- /**
- * Generate a document, given an initialized Fop object
- * @param userAgent the user agent
- * @param outputFormat the output format to generate (MIME type, see MimeConstants)
- * @param out the output stream to write the generated output to (may be null if not applicable)
- * @throws FOPException in case of an error during processing
- */
- public void renderTo(FOUserAgent userAgent, String outputFormat, OutputStream out)
- throws FOPException {
-
- Fop fop = new Fop(outputFormat, userAgent);
- if (out != null) {
- fop.setOutputStream(out);
- }
-
- // if base URL was not explicitly set in FOUserAgent, obtain here
- if (fop.getUserAgent().getBaseURL() == null) {
- String baseURL = null;
-
- try {
- baseURL = new File(sourcefile.getAbsolutePath()).
- getParentFile().toURL().toExternalForm();
- } catch (Exception e) {
- baseURL = "";
- }
- fop.getUserAgent().setBaseURL(baseURL);
- }
-
- // Resulting SAX events (the generated FO) must be piped through to FOP
- Result res = new SAXResult(fop.getDefaultHandler());
-
- transformTo(res);
- }
-
- /** @see org.apache.fop.render.awt.viewer.Renderable */
- public void renderTo(FOUserAgent userAgent, String outputFormat) throws FOPException {
- renderTo(userAgent, outputFormat, null);
- }
-
- /**
- * In contrast to render(Fop) this method only performs the XSLT stage and saves the
- * intermediate XSL-FO file to the output file.
- * @param out OutputStream to write the transformation result to.
- * @throws FOPException in case of an error during processing
- */
- public void transformTo(OutputStream out) throws FOPException {
- Result res = new StreamResult(out);
- transformTo(res);
- }
-
- /**
- * Transforms the input document to the input format expected by FOP using XSLT.
- * @param result the Result object where the result of the XSL transformation is sent to
- * @throws FOPException in case of an error during processing
- */
- protected void transformTo(Result result) throws FOPException {
- try {
- // Setup XSLT
- TransformerFactory factory = TransformerFactory.newInstance();
- Transformer transformer;
-
- if (stylesheet == null) { // FO Input
- transformer = factory.newTransformer();
- } else { // XML/XSLT input
- transformer = factory.newTransformer(new StreamSource(
- stylesheet));
-
- // Set the value of parameters, if any, defined for stylesheet
- if (xsltParams != null) {
- for (int i = 0; i < xsltParams.size(); i += 2) {
- transformer.setParameter((String) xsltParams.elementAt(i),
- (String) xsltParams.elementAt(i + 1));
- }
- }
- }
- transformer.setErrorListener(this);
-
- // Create a SAXSource from the input Source file
- Source src = new StreamSource(sourcefile);
-
- // Start XSLT transformation and FOP processing
- transformer.transform(src, result);
-
- } catch (Exception e) {
- throw new FOPException(e);
- }
- }
-
- // --- Implementation of the ErrorListener interface ---
-
- /**
- * @see javax.xml.transform.ErrorListener#warning(javax.xml.transform.TransformerException)
- */
- public void warning(TransformerException exc) {
- log.warn(exc.toString());
- }
-
- /**
- * @see javax.xml.transform.ErrorListener#error(javax.xml.transform.TransformerException)
- */
- public void error(TransformerException exc) {
- log.error(exc.toString());
- }
-
- /**
- * @see javax.xml.transform.ErrorListener#fatalError(javax.xml.transform.TransformerException)
- */
- public void fatalError(TransformerException exc)
- throws TransformerException {
- throw exc;
- }
-
- }
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