001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.commons.scxml.env; 018 019 import org.apache.commons.scxml.SCXMLListener; 020 import org.apache.commons.scxml.model.Transition; 021 import org.apache.commons.scxml.model.TransitionTarget; 022 023 /** 024 * An abstract adapter class for the <code>SXCMLListener</code> interface. 025 * This class exists as a convenience for creating listener objects, and as 026 * such all the methods in this class are empty. 027 * 028 * @since 0.7 029 */ 030 public abstract class AbstractSCXMLListener implements SCXMLListener { 031 032 /** 033 * @see SCXMLListener#onEntry(TransitionTarget) 034 */ 035 public void onEntry(final TransitionTarget state) { 036 // empty 037 } 038 039 /** 040 * @see SCXMLListener#onExit(TransitionTarget) 041 */ 042 public void onExit(final TransitionTarget state) { 043 // empty 044 } 045 046 /** 047 * @see SCXMLListener#onTransition(TransitionTarget,TransitionTarget,Transition) 048 */ 049 public void onTransition(final TransitionTarget from, 050 final TransitionTarget to, final Transition transition) { 051 // empty 052 } 053 054 } 055