| /* |
| * 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.commons.scxml2; |
| |
| import org.apache.commons.scxml2.model.EnterableState; |
| import org.apache.commons.scxml2.model.Transition; |
| import org.apache.commons.scxml2.model.TransitionTarget; |
| |
| /** |
| * Listener interface for observable entities in the SCXML model. |
| * Observable entities include {@link org.apache.commons.scxml2.model.SCXML} |
| * instances (subscribe to all entry, exit and transition notifications), |
| * {@link org.apache.commons.scxml2.model.State} instances (subscribe to |
| * particular entry and exit notifications) and |
| * {@link org.apache.commons.scxml2.model.Transition} instances (subscribe to |
| * particular transitions). |
| * |
| */ |
| public interface SCXMLListener { |
| |
| /** |
| * Handle the entry into a EnterableState. |
| * |
| * @param state The EnterableState entered |
| */ |
| void onEntry(EnterableState state); |
| |
| /** |
| * Handle the exit out of a EnterableState. |
| * |
| * @param state The EnterableState exited |
| */ |
| void onExit(EnterableState state); |
| |
| /** |
| * Handle the transition. |
| * |
| * @param from The source TransitionTarget |
| * @param to The destination TransitionTarget |
| * @param transition The Transition taken |
| * @param event The event name triggering the transition |
| */ |
| void onTransition(TransitionTarget from, TransitionTarget to, |
| Transition transition, String event); |
| |
| } |
| |