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.avro.file;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  
  import org.apache.avro.util.NonCopyingByteArrayOutputStream;
  import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
  import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream;
  
  /** * Implements bzip2 compression and decompression. */
  public class BZip2Codec extends Codec {
  
    public static final int DEFAULT_BUFFER_SIZE = 64 * 1024;
    private final byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
  
    static class Option extends CodecFactory {
      @Override
      protected Codec createInstance() {
        return new BZip2Codec();
      }
    }
  
    @Override
    public String getName() {
      return DataFileConstants.BZIP2_CODEC;
    }
  
    @Override
    public ByteBuffer compress(ByteBuffer uncompressedData) throws IOException {
      NonCopyingByteArrayOutputStream baos = new NonCopyingByteArrayOutputStream(DEFAULT_BUFFER_SIZE);
  
      try (BZip2CompressorOutputStream outputStream = new BZip2CompressorOutputStream(baos)) {
        outputStream.write(uncompressedData.array(), computeOffset(uncompressedData), uncompressedData.remaining());
      }
  
      return baos.asByteBuffer();
    }
  
    @Override
    public ByteBuffer decompress(ByteBuffer compressedData) throws IOException {
      ByteArrayInputStream bais = new ByteArrayInputStream(compressedData.array(), computeOffset(compressedData),
          compressedData.remaining());
  
      @SuppressWarnings("resource")
      NonCopyingByteArrayOutputStream baos = new NonCopyingByteArrayOutputStream(DEFAULT_BUFFER_SIZE);
  
      try (BZip2CompressorInputStream inputStream = new BZip2CompressorInputStream(bais)) {
  
        int readCount;
        while ((readCount = inputStream.read(buffer, compressedData.position(), buffer.length)) > 0) {
          baos.write(buffer, 0, readCount);
        }
  
        return baos.asByteBuffer();
      }
    }
  
    @Override
    public int hashCode() {
      return getName().hashCode();
    }
  
    @Override
    public boolean equals(Object obj) {
      if (this == obj)
        return true;
      return obj != null && obj.getClass() == getClass();
    }
  
  }
  