content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.activemq.web.util;
  
  public class ExceptionUtils {
  
      /**
       * Finds the root cause of an exception.  Will return the original
       * exception if the first getCause returns null.
       *
       * @param e
       * @return
       */
      public static Throwable getRootCause(final Throwable e) {
          Throwable result = e;
  
          //loop over to find the root cause while guarding against cycles
          while(result != null && result.getCause() != null
                  && e != result.getCause() && result != result.getCause() ) {
              result = result.getCause();
          }
  
          return result;
      }
  
      /**
       * Returns true if the passed in class is the root cause of the exception
       *
       * @param e
       * @param clazz
       * @return
       */
      public static boolean isRootCause(final Throwable e, final Class<?> clazz) {
          if (clazz == null || e == null) {
              return false;
          }
          return clazz.isInstance(getRootCause(e));
      }
  
  }
  