content: /*
   * Copyright (C) 2016 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.trackselection;
  
  import java.util.Arrays;
  
  /**
   * The result of a {@link TrackSelector} operation.
   */
  public final class TrackSelectionArray {
  
    /**
     * The number of selections in the result. Greater than or equal to zero.
     */
    public final int length;
  
    private final TrackSelection[] trackSelections;
  
    // Lazily initialized hashcode.
    private int hashCode;
  
    /**
     * @param trackSelections The selections. Must not be null, but may contain null elements.
     */
    public TrackSelectionArray(TrackSelection... trackSelections) {
      this.trackSelections = trackSelections;
      this.length = trackSelections.length;
    }
  
    /**
     * Returns the selection at a given index.
     *
     * @param index The index of the selection.
     * @return The selection.
     */
    public TrackSelection get(int index) {
      return trackSelections[index];
    }
  
    /**
     * Returns the selections in a newly allocated array.
     */
    public TrackSelection[] getAll() {
      return trackSelections.clone();
    }
  
    @Override
    public int hashCode() {
      if (hashCode == 0) {
        int result = 17;
        result = 31 * result + Arrays.hashCode(trackSelections);
        hashCode = result;
      }
      return hashCode;
    }
  
    @Override
    public boolean equals(Object obj) {
      if (this == obj) {
        return true;
      }
      if (obj == null || getClass() != obj.getClass()) {
        return false;
      }
      TrackSelectionArray other = (TrackSelectionArray) obj;
      return Arrays.equals(trackSelections, other.trackSelections);
    }
  
  }
  