/*
* JaamSim Discrete Event Simulation
* Copyright (C) 2014 Ausenco Engineering Canada Inc.
*
* 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.jaamsim.states;
public interface StateEntityListener {
/**
* Returns true if this object is monitoring the specified entity's state.
* @param ent - the specified entity
* @return true if the specified entity is being monitored
*/
public boolean isWatching(StateEntity ent);
/**
* Indicates that the specified entity has changed state.
* @param ent - the specified entity
* @param prev - old state for the specified entity
* @param next - new state for the specified entity
*/
public void updateForStateChange(StateEntity ent, StateRecord prev, StateRecord next);
}