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/**
* Copyright 2007 Google Inc.
*
* 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.tonicsystems.jarjar.util;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.JarOutputStream;
import java.util.Enumeration;
import java.io.*;
import java.util.*;
public class StandaloneJarProcessor
{
public static void run(File from, File to, JarProcessor proc) throws IOException {
byte[] buf = new byte[0x2000];
JarFile in = new JarFile(from);
final File tmpTo = File.createTempFile("jarjar", ".jar");
JarOutputStream out = new JarOutputStream(new FileOutputStream(tmpTo));
Set<String> entries = new HashSet<String>();
try {
EntryStruct struct = new EntryStruct();
Enumeration<JarEntry> e = in.entries();
while (e.hasMoreElements()) {
JarEntry entry = e.nextElement();
struct.name = entry.getName();
struct.time = entry.getTime();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
IoUtil.pipe(in.getInputStream(entry), baos, buf);
struct.data = baos.toByteArray();
if (proc.process(struct)) {
if (entries.add(struct.name)) {
entry = new JarEntry(struct.name);
entry.setTime(struct.time);
entry.setCompressedSize(-1);
out.putNextEntry(entry);
out.write(struct.data);
} else if (struct.name.endsWith("/")) {
// TODO(chrisn): log
} else {
throw new IllegalArgumentException("Duplicate jar entries: " + struct.name);
}
}
}
}
finally {
in.close();
out.close();
}
// delete the empty directories
IoUtil.copyZipWithoutEmptyDirectories(tmpTo, to);
tmpTo.delete();
}
}
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