/*
    * Copyright (c) 2012 the original author or authors.
    *
    * 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 org.eclipse.jetty.spdy;
  
  import java.util.zip.DataFormatException;
  import java.util.zip.Deflater;
  import java.util.zip.Inflater;
  import java.util.zip.ZipException;
  
  public class StandardCompressionFactory implements CompressionFactory
  {
      @Override
      public Compressor newCompressor()
      {
          return new StandardCompressor();
      }
  
      @Override
      public Decompressor newDecompressor()
      {
          return new StandardDecompressor();
      }
  
      public static class StandardCompressor implements Compressor
      {
          private final Deflater deflater = new Deflater();
  
          @Override
          public void setInput(byte[] input)
          {
              deflater.setInput(input);
          }
  
          @Override
          public void setDictionary(byte[] dictionary)
          {
              deflater.setDictionary(dictionary);
          }
  
          @Override
          public int compress(byte[] output)
          {
              return deflater.deflate(output, 0, output.length, Deflater.SYNC_FLUSH);
          }
      }
  
      public static class StandardDecompressor implements CompressionFactory.Decompressor
      {
          private final Inflater inflater = new Inflater();
  
          @Override
          public void setDictionary(byte[] dictionary)
          {
              inflater.setDictionary(dictionary);
          }
  
          @Override
          public void setInput(byte[] input)
          {
              inflater.setInput(input);
          }
  
          @Override
          public int decompress(byte[] output) throws ZipException
          {
              try
              {
                  return inflater.inflate(output);
              }
              catch (DataFormatException x)
              {
                  throw (ZipException)new ZipException().initCause(x);
              }
          }
      }
  }