content: /*
   * Copyright 2023 Aiven Oy
   *
   * Licensed 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 io.aiven.kafka.tieredstorage.transform;
  
  import java.util.Enumeration;
  
  /**
   * The enumeration of chunks being transformed.
   *
   * <p>There are supposed to be multiple implementation doing different transformations
   * (like compression and encryption).
   * These implementations are supposed to be composable.
   */
  public interface TransformChunkEnumeration extends Enumeration<byte[]> {
      /**
       * Returns the original (i.e. before all the transformations) chunk size.
       *
       * <p>Normally it should be propagated through the chain of transformations.
       */
      int originalChunkSize();
  
      /**
       * Returns a transformed chunk size if it's known.
       *
       * @return a transformed chunk size; or {@code null} if unknown.
       */
      Integer transformedChunkSize();
  }
  