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.ambari.server.state.fsm;
  
  /**
   * Exception thrown when a StateMachine encounters an invalid
   * event at its current state.
   */
  @SuppressWarnings("serial")
  public class InvalidStateTransitionException extends Exception {
  
    private Enum<?> currentState;
    private Enum<?> event;
  
    public InvalidStateTransitionException(Enum<?> currentState, Enum<?> event) {
      super("Invalid event: " + event + " at " + currentState);
      this.currentState = currentState;
      this.event = event;
    }
  
    public Enum<?> getCurrentState() {
      return currentState;
    }
  
    public Enum<?> getEvent() {
      return event;
    }
  
  }
  