content: /*
   * Copyright (C) 2017 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.android.internal.util;
  
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  
  /** @hide */
  public class ObjectUtils {
      private ObjectUtils() {}
  
      @NonNull
      public static <T> T firstNotNull(@Nullable T a, @NonNull T b) {
          return a != null ? a : Preconditions.checkNotNull(b);
      }
  
      public static <T extends Comparable> int compare(@Nullable T a, @Nullable T b) {
          if (a != null) {
              return (b != null) ? a.compareTo(b) : 1;
          } else {
              return (b != null) ? -1 : 0;
          }
      }
  }
  