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.io.InputStream;
  import java.io.OutputStream;
  import java.nio.ByteBuffer;
  
  import org.apache.avro.util.NonCopyingByteArrayOutputStream;
  
  public class ZstandardCodec extends Codec {
    public final static int DEFAULT_COMPRESSION = 3;
    public final static boolean DEFAULT_USE_BUFFERPOOL = false;
    private static final int DEFAULT_BUFFER_SIZE = 8192;
  
    static class Option extends CodecFactory {
      private final int compressionLevel;
      private final boolean useChecksum;
      private final boolean useBufferPool;
  
      Option(int compressionLevel, boolean useChecksum, boolean useBufferPool) {
        this.compressionLevel = compressionLevel;
        this.useChecksum = useChecksum;
        this.useBufferPool = useBufferPool;
      }
  
      @Override
      protected Codec createInstance() {
        return new ZstandardCodec(compressionLevel, useChecksum, useBufferPool);
      }
    }
  
    private final int compressionLevel;
    private final boolean useChecksum;
    private final boolean useBufferPool;
  
    /**
     * Create a ZstandardCodec instance with the given compressionLevel, checksum,
     * and bufferPool option
     **/
    public ZstandardCodec(int compressionLevel, boolean useChecksum, boolean useBufferPool) {
      this.compressionLevel = compressionLevel;
      this.useChecksum = useChecksum;
      this.useBufferPool = useBufferPool;
    }
  
    @Override
    public String getName() {
      return DataFileConstants.ZSTANDARD_CODEC;
    }
  
    @Override
    public ByteBuffer compress(ByteBuffer data) throws IOException {
      NonCopyingByteArrayOutputStream baos = new NonCopyingByteArrayOutputStream(DEFAULT_BUFFER_SIZE);
      try (OutputStream outputStream = ZstandardLoader.output(baos, compressionLevel, useChecksum, useBufferPool)) {
        outputStream.write(data.array(), computeOffset(data), data.remaining());
      }
      return baos.asByteBuffer();
    }
  
    @Override
    public ByteBuffer decompress(ByteBuffer compressedData) throws IOException {
      NonCopyingByteArrayOutputStream baos = new NonCopyingByteArrayOutputStream(DEFAULT_BUFFER_SIZE);
      InputStream bytesIn = new ByteArrayInputStream(compressedData.array(), computeOffset(compressedData),
          compressedData.remaining());
      try (InputStream ios = ZstandardLoader.input(bytesIn, useBufferPool)) {
        ios.transferTo(baos);
      }
      return baos.asByteBuffer();
    }
  
    @Override
    public int hashCode() {
      return getName().hashCode();
    }
  
    @Override
    public boolean equals(Object obj) {
      return (this == obj) || (obj != null && obj.getClass() == this.getClass());
    }
  
    @Override
    public String toString() {
      return getName() + "[" + compressionLevel + "]";
    }
  }
  