content: /*
   * Copyright (C) 2007 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 java.util.Arrays;
  
  /**
   * Object utility methods.
   */
  public class Objects {
  
      /**
       * Determines whether two possibly-null objects are equal. Returns:
       * <p/>
       * <ul>
       * <li>{@code true} if {@code a} and {@code b} are both null.
       * <li>{@code true} if {@code a} and {@code b} are both non-null and they are
       * equal according to {@link Object#equals(Object)}.
       * <li>{@code false} in all other situations.
       * </ul>
       * <p/>
       * <p>This assumes that any non-null objects passed to this function conform
       * to the {@code equals()} contract.
       */
      public static boolean equal(Object a, Object b) {
          return a == b || (a != null && a.equals(b));
      }
  
      /**
       * Generates a hash code for multiple values. The hash code is generated by
       * calling {@link Arrays#hashCode(Object[])}.
       * <p/>
       * <p>This is useful for implementing {@link Object#hashCode()}. For example,
       * in an object that has three properties, {@code x}, {@code y}, and
       * {@code z}, one could write:
       * <pre>
       * public int hashCode() {
       *   return Objects.hashCode(getX(), getY(), getZ());
       * }</pre>
       *
       * <b>Warning</b>: When a single object is supplied, the returned hash code
       * does not equal the hash code of that object.
       */
      public static int hashCode(Object... objects) {
          return Arrays.hashCode(objects);
      }
  
  }
  