2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Copyright (C) 2017 Amdocs
8 * =============================================================================
9 * Licensed under the Apache License, Version 2.0 (the "License");
10 * you may not use this file except in compliance with the License.
11 * You may obtain a copy of the License at
13 * http://www.apache.org/licenses/LICENSE-2.0
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
21 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
22 * ============LICENSE_END=========================================================
25 package org.openecomp.appc.statemachine;
27 import org.openecomp.appc.exceptions.InvalidInputException;
28 import org.openecomp.appc.statemachine.objects.Event;
29 import org.openecomp.appc.statemachine.objects.State;
30 import org.openecomp.appc.statemachine.objects.StateMachineResponse;
33 * Interface of the StateMachine
35 public interface StateMachine {
38 * @param currentState the current State which the event should be handled from
39 * @param event the Event that needs to be handled
40 * @return StateMachineResponse
41 * @throws InvalidInputException
42 * when the passed in currentState and event are not predefined or no relevant transition
44 StateMachineResponse handleEvent(State currentState, Event event) throws InvalidInputException;