/* * 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); }