/*
* Copyright 2006 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: MultipleFO2PDF.java 389086 2006-03-27 09:51:14Z jeremias $ */
package embedding;
// Java
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
//JAXP
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.Source;
import javax.xml.transform.Result;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.sax.SAXResult;
// FOP
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.FormattingResults;
import org.apache.fop.apps.MimeConstants;
import org.apache.fop.apps.PageSequenceResults;
/**
* This class demonstrates the conversion of multiple FO files to PDF using FOP.
* The FopFactory is reused. Its configuration is applied to each rendering run.
* The FOUserAgent and Fop are newly created by the FopFactory for each run.
* The FOUserAgent can be configured differently for each run.
*/
public class MultipleFO2PDF {
// configure fopFactory as desired
private FopFactory fopFactory = FopFactory.newInstance();
// JAXP TransformerFactory can be reused, too
private TransformerFactory factory = TransformerFactory.newInstance();
/**
* Converts an FO file to a PDF file using FOP
* @param fo the FO file
* @param pdf the target PDF file
* @throws TransformerException in case of a transformation problem
* @throws IOException in case of an I/O problem
* @throws FOPException in case of a FOP problem
* @return the formatting results of the run
*/
public FormattingResults convertFO2PDF(File fo, File pdf)
throws TransformerException, IOException, FOPException {
OutputStream out = null;
Fop fop;
try {
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
// configure foUserAgent as desired
// Setup output stream. Note: Using BufferedOutputStream
// for performance reasons (helpful with FileOutputStreams).
out = new FileOutputStream(pdf);
out = new BufferedOutputStream(out);
// Construct fop with desired output format and output stream
fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);
// Setup JAXP using identity transformer
Transformer transformer = factory.newTransformer(); // identity transformer
// Setup input stream
Source src = new StreamSource(fo);
// Resulting SAX events (the generated FO) must be piped through to FOP
Result res = new SAXResult(fop.getDefaultHandler());
// Start XSLT transformation and FOP processing
transformer.transform(src, res);
} finally {
out.close();
}
return fop.getResults();
}
/**
* Listens on standard in for names of fo files to be transformed to pdf.
* 'quit' or the null string (for piped input) cause the listener to stop listening.
*/
public void listen() {
//Setup directories
File baseDir = new File(".");
File outDir = new File(baseDir, "out");
outDir.mkdirs();
BufferedReader in = new BufferedReader(new java.io.InputStreamReader(System.in));
while (true) {
try {
// Listen for the input file name
System.out.print("Input XSL-FO file ('quit' to stop): ");
String foname = in.readLine();
if (foname == null) {
System.out.println("Null input, quitting");
return;
}
foname.trim();
if (foname.equals("quit")) {
System.out.println("Quitting");
return;
}
File fofile = new File(baseDir, foname);
String pdfname = foname;
pdfname.replaceFirst("\\.fo", ".pdf");
File pdffile = new File(outDir, pdfname);
// transform and render
System.out.print("Transforming " + fofile + " to PDF file " + pdffile + "...");
FormattingResults foResults = convertFO2PDF(fofile, pdffile);
System.out.println("done!");
// Result processing
java.util.List pageSequences = foResults.getPageSequences();
for (java.util.Iterator it = pageSequences.iterator(); it.hasNext();) {
PageSequenceResults pageSequenceResults = (PageSequenceResults)it.next();
System.out.println("PageSequence "
+ (String.valueOf(pageSequenceResults.getID()).length() > 0
? pageSequenceResults.getID() : "<no id>")
+ " generated " + pageSequenceResults.getPageCount() + " pages.");
}
System.out.println("Generated " + foResults.getPageCount() + " pages in total.");
} catch (Exception e) {
System.out.println("failure!");
e.printStackTrace(System.out);
} finally {
System.out.println("");
}
}
}
/**
* Main method. Set up the listener.
* @param args command-line arguments
*/
public static void main(String[] args) {
System.out.println("FOP MultipleFO2PDF\n");
System.out.println("Preparing...");
MultipleFO2PDF m = new MultipleFO2PDF();
m.listen();
}
}