content: /*******************************************************************************
   * Copyright 2014 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.amazonaws.services.kinesis.log4j.helpers;
  
  /**
   * Utility class for validating configurations
   */
  public class Validator {
    /**
     * Tests if input is null or empty.
     * 
     * @param input
     *          test string
     * @return true if input is null or empty; false otherwise
     */
    public static boolean isBlank(String input) {
      return input == null || input.trim().isEmpty();
    }
  
    /**
     * For validating conditions and throwing error messages if the condition
     * doesn't hold true
     * 
     * @param trueCondition
     *          boolean condition to be validated
     * @param exceptionMsg
     *          error message to throw as {@code IllegalArgumentException} if
     *          condition doesn't hold true
     */
    public static void validate(boolean trueCondition, String exceptionMsg) {
      if (!trueCondition) {
        throw new IllegalArgumentException(exceptionMsg);
      }
    }
  }
  