/*
 * 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
 *
 * 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 org.apache.geode.internal.cache;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;

/**
 * Utility methods for unzipping a file. Used for backwards compatibility test for gateway queue to
 * handle checked in test code.
 *
 */
public class UnzipUtil {

  public static final void unzip(InputStream input, String targetDir) throws IOException {

    File dir = new File(targetDir);
    if (!dir.exists() && !dir.mkdir()) {
      throw new IOException("Unable to create dir" + dir);
    }

    ZipInputStream zipInput;

    zipInput = new ZipInputStream(input);


    ZipEntry entry;
    while ((entry = zipInput.getNextEntry()) != null) {

      File newFile = new File(dir, entry.getName());
      if (entry.isDirectory()) {
        if (!newFile.mkdirs()) {
          throw new IOException("Unable to create directory" + newFile);
        }
        continue;
      }

      copyInputStream(zipInput, new BufferedOutputStream(new FileOutputStream(newFile)));
      zipInput.closeEntry();
    }

    zipInput.close();
  }

  public static final void copyInputStream(InputStream in, OutputStream out) throws IOException {
    byte[] buffer = new byte[1024];
    int len;

    while ((len = in.read(buffer)) >= 0)
      out.write(buffer, 0, len);

    out.close();
  }

  private UnzipUtil() {

  }
}