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.celeborn.client.compress;
  
  import scala.Option;
  
  import org.apache.celeborn.common.CelebornConf;
  import org.apache.celeborn.common.protocol.CompressionCodec;
  
  public interface Decompressor {
  
    int decompress(byte[] src, byte[] dst, int dstOff);
  
    int getOriginalLen(byte[] src);
  
    default int readIntLE(byte[] buf, int i) {
      return (buf[i] & 0xFF)
          | ((buf[i + 1] & 0xFF) << 8)
          | ((buf[i + 2] & 0xFF) << 16)
          | ((buf[i + 3] & 0xFF) << 24);
    }
  
    static Decompressor getDecompressor(CelebornConf conf) {
      CompressionCodec codec = conf.shuffleCompressionCodec();
      switch (codec) {
        case LZ4:
          Option<String> xxHashInstance = conf.shuffleDecompressionLz4XXHashInstance();
          return new Lz4Decompressor(xxHashInstance);
        case ZSTD:
          return new ZstdDecompressor();
        default:
          throw new IllegalArgumentException("Unknown compression codec: " + codec);
      }
    }
  
    static int getCompressionHeaderLength(CelebornConf conf) {
      CompressionCodec codec = conf.shuffleCompressionCodec();
      switch (codec) {
        case LZ4:
          return Lz4Trait.HEADER_LENGTH;
        case ZSTD:
          return ZstdTrait.HEADER_LENGTH;
        default:
          throw new IllegalArgumentException("Unknown compression codec: " + codec);
      }
    }
  }
  