/**
 * 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.util.zip.ZipOutputStream;
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];
        File tmp = null;
        if (from.equals(to)) {
            tmp = File.createTempFile("jarjar", null);
            IoUtil.copy(from, tmp, buf);
            from = tmp;
        }
        JarFile in = new JarFile(from);
        JarOutputStream out = new JarOutputStream(new FileOutputStream(to));
        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 {
            out.close();
            if (tmp != null)
                tmp.delete();
        }
    }
}

@@ -956,16 +956,171 @@
 ption %7B%0A
+        run(from, to, proc, false);%0A    %7D%0A    public static void run(File from, File to, JarProcessor proc, boolean ignoreDuplicates) throws IOException %7B%0A
         
@@ -2488,16 +2488,39 @@
   %7D else
+ if (!ignoreDuplicates)
  %7B%0A     

Allow duplicate entries to be ignored