content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one or more
   *  contributor license agreements.  See the NOTICE file distributed with
   *  this work for additional information regarding copyright ownership.
   *  The ASF licenses this file to You 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
   *
   *      https://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 org.apache.ivy.osgi.util;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.zip.ZipEntry;
  import java.util.zip.ZipOutputStream;
  
  /**
   * Class derived from code posted here: http://forums.sun.com/thread.jspa?messageID=2160923
   */
  public class ZipUtil {
      public static void zip(File sourceDir, OutputStream targetStream) throws IOException {
          if (!sourceDir.isFile() && !sourceDir.isDirectory()) {
              return;
          }
  
          final ZipOutputStream cpZipOutputStream = new ZipOutputStream(targetStream);
          cpZipOutputStream.setLevel(9);
          zipFiles(sourceDir, sourceDir, cpZipOutputStream);
          cpZipOutputStream.finish();
          cpZipOutputStream.close();
      }
  
      private static void zipFiles(File rootDir, File currDir, ZipOutputStream zos)
              throws IOException {
          if (currDir.isDirectory()) {
              for (File file : currDir.listFiles()) {
                  zipFiles(rootDir, file, zos);
              }
          } else {
              final String strAbsPath = currDir.getPath();
              final String strZipEntryName = strAbsPath.substring(rootDir.getPath().length() + 1);
  
              final byte[] b = new byte[(int) (currDir.length())];
              final FileInputStream fis = new FileInputStream(currDir);
              fis.read(b);
              fis.close();
  
              final ZipEntry entry = new ZipEntry(strZipEntryName);
              zos.putNextEntry(entry);
              zos.write(b, 0, (int) currDir.length());
              zos.closeEntry();
          }
      }
  }
  