content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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.alibaba.nacos.common.utils;
  
  import java.util.Objects;
  
  /**
   * Check precondition, throws an {@code IllegalArgumentException} If the conditions are not met.
   * @author zzq
   * @date 2021/7/29
   */
  public class Preconditions {
  
      private Preconditions() {
      }
  
      /**
       * check precondition.
       * @param expression a boolean expression
       * @param errorMessage the exception message to use if the check fails
       * @throws IllegalArgumentException if {@code expression} is false
       */
      public static void checkArgument(boolean expression, Object errorMessage) {
          if (Objects.isNull(errorMessage)) {
              throw new IllegalArgumentException("errorMessage cannot be null.");
          }
          if (!expression) {
              throw new IllegalArgumentException(String.valueOf(errorMessage));
          }
      }
      
      /**
       * check precondition.
       * @param expression a boolean expression
       * @param errorMessageTemplate the exception message template to use if the check fails
       * @param errorMessageArgs the arguments to be substituted into the message template.
       * @throws IllegalArgumentException if {@code expression} is false
       */
      public static void checkArgument(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) {
          if (Objects.isNull(errorMessageArgs) || Objects.isNull(errorMessageTemplate)) {
              throw new IllegalArgumentException("errorMessageTemplate or errorMessage cannot be null.");
          }
          if (!expression) {
              throw new IllegalArgumentException(String.format(errorMessageTemplate, errorMessageArgs));
          }
      }
  }
  