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   /*
    * Copyright 2021 The Netty Project
    *
    * The Netty Project 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 io.netty.handler.codec.compression;
  
  import io.netty.util.internal.ObjectUtil;
  
  /**
   * {@link DeflateOptions} holds {@link #compressionLevel()},
   * {@link #memLevel()} and {@link #windowBits()} for Deflate compression.
   */
  public class DeflateOptions implements CompressionOptions {
  
      private final int compressionLevel;
      private final int windowBits;
      private final int memLevel;
  
      /**
       * @see StandardCompressionOptions#deflate()
       */
      static final DeflateOptions DEFAULT = new DeflateOptions(
              6, 15, 8
      );
  
      /**
       * @see StandardCompressionOptions#deflate(int, int, int)
       */
      DeflateOptions(int compressionLevel, int windowBits, int memLevel) {
          this.compressionLevel = ObjectUtil.checkInRange(compressionLevel, 0, 9, "compressionLevel");
          this.windowBits = ObjectUtil.checkInRange(windowBits, 9, 15, "windowBits");
          this.memLevel = ObjectUtil.checkInRange(memLevel, 1, 9, "memLevel");
      }
  
      public int compressionLevel() {
          return compressionLevel;
      }
  
      public int windowBits() {
          return windowBits;
      }
  
      public int memLevel() {
          return memLevel;
      }
  }