// Copyright 2012 Giuseppe Iacono, Felipe Munoz Castillo
//
// 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.
package com.fides;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.jar.JarInputStream;
import java.util.zip.ZipEntry;
/**
* Provide method to decompress jar files
*
* @author Giuseppe Iacono
*/
public final class FileUtil
{
private static final int BUFFER = 1024;
public static void unJarDirectory(String in, File fOut, String directoryName)
throws IOException
{
if (!fOut.exists()) {
fOut.mkdirs();
}
if (!fOut.isDirectory()) {
throw new IOException("Destination must be a directory.");
}
JarInputStream jin = new JarInputStream(new FileInputStream(in));
byte[] buffer = new byte[BUFFER];
ZipEntry entry = jin.getNextEntry();
while (entry != null) {
String fileName = entry.getName();
if (fileName.charAt(fileName.length() - 1) == '/') {
fileName = fileName.substring(0, fileName.length() - 1);
}
if (fileName.charAt(0) == '/') {
fileName = fileName.substring(1);
}
if (File.separatorChar != '/') {
fileName = fileName.replace('/', File.separatorChar);
}
File file = new File(fOut, fileName);
if (entry.getName().contains(directoryName)) {
if (entry.isDirectory()) {
// make sure the directory exists
file.mkdirs();
jin.closeEntry();
}
else {
// make sure the directory exists
File parent = file.getParentFile();
if (parent != null && !parent.exists()) {
parent.mkdirs();
}
// dump the file
OutputStream out = new FileOutputStream(file);
int len = 0;
while ((len = jin.read(buffer, 0, buffer.length)) != -1) {
out.write(buffer, 0, len);
}
out.flush();
out.close();
jin.closeEntry();
file.setLastModified(entry.getTime());
}
}
entry = jin.getNextEntry();
}
jin.close();
}
}