/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
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* Foundation" must not be used to endorse or promote products derived
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
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*/
package com.limegroup.gnutella.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
/**
* Unzip a file. "Imported" from Ant, with small adaptations.
*
* @author costin@dnt.ro
*/
public final class Expand {
/**
* Ensure that this class will never be constructed.
*/
private Expand() {}
/**
* Expand the specified source file into the specified destination
* directory.
*
* @param source the source <tt>File</tt> to expand
* @param dest the destination directory in which to expand the
* source file
* @throws <tt>IOException</tt> if the source file cannot be found,
* if the destination directory cannot be written to, or there is
* any other IO error
*/
public static void expandFile(File source, File dest) throws IOException {
expandFile(source, dest, false, null);
}
/**
* Expand the specified source file into the specified destination
* directory.
*
* @param source the source <tt>File</tt> to expand
* @param dest the destination directory in which to expand the
* source file
* @throws <tt>IOException</tt> if the source file cannot be found,
* if the destination directory cannot be written to, or there is
* any other IO error
*/
public static void expandFile(File source, File dest, boolean overwrite)
throws IOException {
expandFile(source, dest, overwrite, null);
}
/**
* Expands the source file to destination. If overwrite is true, all files
* will be overwritten (regardless of modification time). If 'names'
* is non-null, any file in 'names' will be expanded regardless of modiciation time.
*/
public static void expandFile(File source, File dest, boolean overwrite, String[] names)
throws IOException {
ZipInputStream zis = null;
try {
FileUtils.setWriteable(source);
zis = new ZipInputStream(
new BufferedInputStream(new FileInputStream(source)));
ZipEntry ze = null;
while ((ze = zis.getNextEntry()) != null) {
File f = new File(dest, ze.getName());
// create intermediary directories - sometimes zip don't add them
File dirF=new File(f.getParent());
dirF.mkdirs();
if (ze.isDirectory()) {
f.mkdirs();
} else if ( ze.getTime() > f.lastModified() ||
overwrite || inNames(ze.getName(), names)) {
FileUtils.setWriteable(f);
byte[] buffer = new byte[1024];
int length = 0;
OutputStream fos = null;
try {
fos = new BufferedOutputStream(new FileOutputStream(f));
while ((length = zis.read(buffer)) >= 0) {
fos.write(buffer, 0, length);
}
} finally {
IOUtils.close(fos);
}
}
}
} finally {
IOUtils.close(zis);
}
}
private static boolean inNames(String name, String[] all) {
if(all == null || name == null)
return false;
for(int i = 0; i < all.length; i++)
if(name.startsWith(all[i]))
return true;
return false;
}
}