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
   *
   *    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.arrow.vector.compression;
  
  import org.apache.arrow.flatbuf.BodyCompressionMethod;
  import org.apache.arrow.memory.ArrowBuf;
  import org.apache.arrow.memory.BufferAllocator;
  import org.apache.arrow.vector.ipc.message.ArrowBodyCompression;
  
  /** The default compression codec that does no compression. */
  public class NoCompressionCodec implements CompressionCodec {
  
    public static final NoCompressionCodec INSTANCE = new NoCompressionCodec();
  
    public static final byte COMPRESSION_TYPE = -1;
  
    public static final ArrowBodyCompression DEFAULT_BODY_COMPRESSION =
        new ArrowBodyCompression(COMPRESSION_TYPE, BodyCompressionMethod.BUFFER);
  
    private NoCompressionCodec() {}
  
    @Override
    public ArrowBuf compress(BufferAllocator allocator, ArrowBuf uncompressedBuffer) {
      return uncompressedBuffer;
    }
  
    @Override
    public ArrowBuf decompress(BufferAllocator allocator, ArrowBuf compressedBuffer) {
      return compressedBuffer;
    }
  
    @Override
    public CompressionUtil.CodecType getCodecType() {
      return CompressionUtil.CodecType.NO_COMPRESSION;
    }
  
    /** The default factory that creates a {@link NoCompressionCodec}. */
    public static class Factory implements CompressionCodec.Factory {
  
      public static final NoCompressionCodec.Factory INSTANCE = new NoCompressionCodec.Factory();
  
      @Override
      public CompressionCodec createCodec(CompressionUtil.CodecType codecType) {
        switch (codecType) {
          case NO_COMPRESSION:
            return NoCompressionCodec.INSTANCE;
          case LZ4_FRAME:
          case ZSTD:
            throw new IllegalArgumentException(
                "Please add arrow-compression module to use CommonsCompressionFactory for "
                    + codecType);
          default:
            throw new IllegalArgumentException("Unsupported codec type: " + codecType);
        }
      }
  
      @Override
      public CompressionCodec createCodec(CompressionUtil.CodecType codecType, int compressionLevel) {
        return createCodec(codecType);
      }
    }
  }
  