com.graphhopper.tools.Bzip2 Maven / Gradle / Ivy
/*
* Licensed to GraphHopper GmbH under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership.
*
* GraphHopper GmbH 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.
*/
package com.graphhopper.tools;
import com.graphhopper.util.Helper;
import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* Simple bzip2 uncompression. TODO integrate with OSMReader!
*/
public class Bzip2 {
public static void main(String[] args) throws IOException {
if (args.length == 0) {
throw new IllegalArgumentException("You need to specify the bz2 file!");
}
String fromFile = args[0];
if (!fromFile.endsWith(".bz2")) {
throw new IllegalArgumentException("You need to specify a bz2 file! But was:" + fromFile);
}
String toFile = Helper.pruneFileEnd(fromFile);
FileInputStream in = new FileInputStream(fromFile);
FileOutputStream out = new FileOutputStream(toFile);
BZip2CompressorInputStream bzIn = new BZip2CompressorInputStream(in);
try {
final byte[] buffer = new byte[1024 * 8];
int n = 0;
while (-1 != (n = bzIn.read(buffer))) {
out.write(buffer, 0, n);
}
} finally {
out.close();
bzIn.close();
}
}
}