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.trevni;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  
  import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
  import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream;
  
  public class BZip2Codec extends Codec {
  
    private ByteArrayOutputStream outputBuffer;
    public static final int DEFAULT_BUFFER_SIZE = 64 * 1024;
  
    @Override
    ByteBuffer compress(ByteBuffer uncompressedData) throws IOException {
      ByteArrayOutputStream baos = getOutputBuffer(uncompressedData.remaining());
  
      try (BZip2CompressorOutputStream outputStream = new BZip2CompressorOutputStream(baos)) {
        outputStream.write(uncompressedData.array(), computeOffset(uncompressedData), uncompressedData.remaining());
      }
  
      return ByteBuffer.wrap(baos.toByteArray());
    }
  
    @Override
    ByteBuffer decompress(ByteBuffer compressedData) throws IOException {
      ByteArrayInputStream bais = new ByteArrayInputStream(compressedData.array(), computeOffset(compressedData),
          compressedData.remaining());
      try (BZip2CompressorInputStream inputStream = new BZip2CompressorInputStream(bais)) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
  
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
  
        int readCount = -1;
  
        while ((readCount = inputStream.read(buffer, compressedData.position(), buffer.length)) > 0) {
          baos.write(buffer, 0, readCount);
        }
  
        return ByteBuffer.wrap(baos.toByteArray());
      }
    }
  
    private ByteArrayOutputStream getOutputBuffer(int suggestedLength) {
      if (null == outputBuffer)
        outputBuffer = new ByteArrayOutputStream(suggestedLength);
      outputBuffer.reset();
      return outputBuffer;
    }
  
  }
  