content: /**
   * Copyright 2015-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * A copy of the License is located at
   *
   *     http://aws.amazon.com/apache2.0/
   *
   * or in the "license" file accompanying this file. This file 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.amazon.utils;
  
  /**
   * Utility methods for verifications.
   */
  public class ObjectVerification {
  
      /**
       * Validation method to check if an object is null. The method returns the same object if it is
       * not null.
       *
       * @param t   Object to be validated.
       * @param ex  The exception message.
       * @param <T> The type to be used in this method.
       * @return An object received.
       * @throws IllegalArgumentException if the argument is null.
       */
      public static <T> T notNull(T t, String ex) {
  
          if (t == null) {
              throw new IllegalArgumentException(ex);
          }
          return t;
      }
  }
  