| /* |
| * Copyright 2008 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.io.*; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.Enumeration; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| import java.util.zip.ZipOutputStream; |
| |
| class IoUtil { |
| private IoUtil() {} |
| |
| public static void pipe(InputStream is, OutputStream out, byte[] buf) throws IOException { |
| for (; ; ) { |
| int amt = is.read(buf); |
| if (amt < 0) { |
| break; |
| } |
| out.write(buf, 0, amt); |
| } |
| } |
| |
| public static void copy(File from, File to, byte[] buf) throws IOException { |
| InputStream in = new FileInputStream(from); |
| try { |
| OutputStream out = new FileOutputStream(to); |
| try { |
| pipe(in, out, buf); |
| } finally { |
| out.close(); |
| } |
| } finally { |
| in.close(); |
| } |
| } |
| |
| /** |
| * Create a copy of an zip file without its empty directories. |
| * |
| * @param inputFile |
| * @param outputFile |
| * @throws IOException |
| */ |
| public static void copyZipWithoutEmptyDirectories(final File inputFile, final File outputFile) |
| throws IOException { |
| final byte[] buf = new byte[0x2000]; |
| |
| final ZipFile inputZip = new ZipFile(inputFile); |
| final ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(outputFile)); |
| try { |
| // read a the entries of the input zip file and sort them |
| final Enumeration<? extends ZipEntry> e = inputZip.entries(); |
| final ArrayList<ZipEntry> sortedList = new ArrayList<ZipEntry>(); |
| while (e.hasMoreElements()) { |
| final ZipEntry entry = e.nextElement(); |
| sortedList.add(entry); |
| } |
| |
| Collections.sort( |
| sortedList, |
| new Comparator<ZipEntry>() { |
| public int compare(ZipEntry o1, ZipEntry o2) { |
| return o1.getName().compareTo(o2.getName()); |
| } |
| }); |
| |
| // treat them again and write them in output, wenn they not are empty directories |
| for (int i = sortedList.size() - 1; i >= 0; i--) { |
| final ZipEntry inputEntry = sortedList.get(i); |
| final String name = inputEntry.getName(); |
| final boolean isEmptyDirectory; |
| if (inputEntry.isDirectory()) { |
| if (i == sortedList.size() - 1) { |
| // no item afterwards; it was an empty directory |
| isEmptyDirectory = true; |
| } else { |
| final String nextName = sortedList.get(i + 1).getName(); |
| isEmptyDirectory = !nextName.startsWith(name); |
| } |
| } else { |
| isEmptyDirectory = false; |
| } |
| |
| // write the entry |
| if (isEmptyDirectory) { |
| sortedList.remove(inputEntry); |
| } else { |
| final ZipEntry outputEntry = new ZipEntry(inputEntry); |
| outputStream.putNextEntry(outputEntry); |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| final InputStream is = inputZip.getInputStream(inputEntry); |
| IoUtil.pipe(is, baos, buf); |
| is.close(); |
| outputStream.write(baos.toByteArray()); |
| } |
| } |
| } finally { |
| outputStream.close(); |
| } |
| } |
| } |