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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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: DSCProcessingExample1.java 750418 2009-03-05 11:03:54Z vhennebert $ */
package ps;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.InputStream;
import org.apache.commons.io.IOUtils;
import org.apache.xmlgraphics.ps.dsc.DSCException;
import org.apache.xmlgraphics.ps.dsc.tools.PageExtractor;
/**
* Demonstrates how the DSC parser can be used to extract a series of pages from a DSC-compliant
* PostScript file. For details how this works, please look into the PageExtractor class
* where the actual functionality is located. This sample class only calls the code there.
*/
public class DSCProcessingExample1 {
/**
* Extracts a series of pages from a DSC-compliant PostScript file.
* @param srcFile the source PostScript file
* @param tgtFile the target file to write the extracted pages to
* @param from the starting page number
* @param to the ending page number
* @throws IOException In case of an I/O error
*/
public void extractPages(File srcFile, File tgtFile, int from, int to) throws IOException {
InputStream in = new java.io.FileInputStream(srcFile);
in = new java.io.BufferedInputStream(in);
try {
OutputStream out = new java.io.FileOutputStream(tgtFile);
out = new java.io.BufferedOutputStream(out);
try {
PageExtractor.extractPages(in, out, from, to);
} catch (DSCException e) {
throw new RuntimeException(e.getMessage());
} finally {
IOUtils.closeQuietly(out);
}
} finally {
IOUtils.closeQuietly(in);
}
}
private static void showInfo() {
System.out.println(
"Call: DSCProcessingExample1 <source-file> <target-file> <from-page> <to-page>");
}
/**
* Command-line interface
* @param args command-line arguments
*/
public static void main(String[] args) {
try {
File srcFile , tgtFile;
int from, to;
if (args.length >= 4) {
srcFile = new File(args[0]);
tgtFile = new File(args[1]);
from = Integer.parseInt(args[2]);
to = Integer.parseInt(args[3]);
} else {
throw new IllegalArgumentException("Invalid number of parameters!");
}
if (!srcFile.exists()) {
throw new IllegalArgumentException("Source file not found: " + srcFile);
}
DSCProcessingExample1 app = new DSCProcessingExample1();
app.extractPages(srcFile, tgtFile, from, to);
System.out.println("File written: " + tgtFile.getCanonicalPath());
} catch (IllegalArgumentException iae) {
System.err.println(iae.getMessage());
showInfo();
System.exit(1);
} catch (Exception e) {
e.printStackTrace();
System.exit(-1);
}
}
}
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