FileUTFConverter.java
/*
* Copyright (c) 2020, 2022 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
/*
* $Id$
*/
/*
* Usage: java FileUTFConverter [-toUTF|-fromUTF] encoding infile outfile
*
* Utility program for converting a UTF-8 file to various UTF
* encoded files and vice-versa.
*
* Example(s):
*
* java FileUTFConverter -toUTF UTF-16 jsonObjectUTF8.json jsonObjectUTF16.json
*
* The above takes a UTF-8 encoded input file (jsonObjectUTF8.json) and converts
* it to a UTF-16 encoded output file (jsonObjectUTF16.json).
*
* java FileUTFConverter -fromUTF UTF-16 jsonObjectUTF16.json jsonObjectUTF8.json
*
* The above takes a UTF-16 encoded input file (jsonObjectUTF16.json) and
* converts it to a UTF-8 encoded output file (jsonObjectUTF8.json).
*
* All UTF encodings can be used:
*
* UTF-8
* UTF-16
* UTF-16BE
* UTF-16LE
* UTF-32BE
* UTF-32LE
*/
package ee.jakarta.tck.jsonp.util;
import java.io.*;
import java.util.logging.Logger;
public class FileUTFConverter {
private static final Logger LOGGER = Logger.getLogger(FileUTFConverter.class.getName());
private static final String USAGE = "Usage : java FileUTFConverter [-toUTF|-fromUTF] encoding infile outfile";
public static void main(String args[]) {
try {
if (args.length != 4) {
LOGGER.warning(USAGE);
System.exit(1);
}
// Convert UTF-8 input file to specified UTF encoded output file
if (args[0].equals("-toUTF")) {
LOGGER.info("FileUTFConverter-> convert UTF-8 encoded input file ("
+ args[2] + "), to encoding (" + args[1]
+ ") and write to output file (" + args[3] + ")");
FileInputStream fis = new FileInputStream(args[2]);
BufferedReader br = new BufferedReader(
new InputStreamReader(fis, "UTF-8"));
FileOutputStream fos = new FileOutputStream(args[3]);
BufferedWriter bw = new BufferedWriter(
new OutputStreamWriter(fos, args[1]));
for (String s = ""; (s = br.readLine()) != null;) {
bw.write(s + System.getProperty("line.separator"));
bw.flush();
}
bw.close();
br.close();
// Convert specified UTF encoded input file to UTF-8 encoded output file
} else if (args[0].equals("-fromUTF")) {
LOGGER.info("FileUTFConverter-> convert UTF encoded input file ("
+ args[2] + "), from encoding (" + args[1]
+ ") and write to UTF-8 encoded output file (" + args[3] + ")");
FileInputStream fis = new FileInputStream(args[2]);
BufferedReader br = new BufferedReader(
new InputStreamReader(fis, args[1]));
FileOutputStream fos = new FileOutputStream(args[3]);
BufferedWriter bw = new BufferedWriter(
new OutputStreamWriter(fos, "UTF-8"));
for (String s = ""; (s = br.readLine()) != null;) {
bw.write(s + System.getProperty("line.separator"));
bw.flush();
}
bw.close();
br.close();
} else {
LOGGER.warning(USAGE);
System.exit(1);
}
System.exit(0);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
}
}