    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