/*
 * 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.hadoop.ozone.common.statemachine;

/**
 * Class wraps invalid state transition exception.
 */
public class InvalidStateTransitionException extends Exception {
  private Enum<?> currentState;
  private Enum<?> event;

  public InvalidStateTransitionException(Enum<?> currentState, Enum<?> event) {
    super("Invalid event: " + event + " at " + currentState + " state.");
    this.currentState = currentState;
    this.event = event;
  }

  public Enum<?> getCurrentState() {
    return currentState;
  }

  public Enum<?> getEvent() {
    return event;
  }

}
