content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * 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 com.google.android.exoplayer2.offline;
  
  import java.util.List;
  
  /**
   * A manifest that can generate copies of itself including only the streams specified by the given
   * keys.
   *
   * @param <T> The manifest type.
   */
  public interface FilterableManifest<T> {
  
    /**
     * Returns a copy of the manifest including only the streams specified by the given keys. If the
     * manifest is unchanged then the instance may return itself.
     *
     * @param streamKeys A non-empty list of stream keys.
     * @return The filtered manifest.
     */
    T copy(List<StreamKey> streamKeys);
  }
  