    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 java.io.Serializable;
    020
    021    import org.apache.commons.logging.Log;
    022    import org.apache.commons.logging.LogFactory;
    023    import org.apache.commons.scxml.SCXMLListener;
    024    import org.apache.commons.scxml.model.Transition;
    025    import org.apache.commons.scxml.model.TransitionTarget;
    026
    027
    028    /**
    029     * Simple SCXML Listener that logs execution.
    030     */
    031    public class SimpleSCXMLListener implements SCXMLListener, Serializable {
    032
    033        /** Serial version UID. */
    034        private static final long serialVersionUID = 1L;
    035        /** Log. */
    036        private Log log = LogFactory.getLog(getClass());
    037
    038
    039        /**
    040         * @see SCXMLListener#onEntry(TransitionTarget)
    041         */
    042        public void onEntry(final TransitionTarget state) {
    043            if (log.isInfoEnabled()) {
    044                log.info(LogUtils.getTTPath(state));
    045            }
    046        }
    047
    048        /**
    049         * @see SCXMLListener#onExit(TransitionTarget)
    050         */
    051        public void onExit(final TransitionTarget state) {
    052            if (log.isInfoEnabled()) {
    053                log.info(LogUtils.getTTPath(state));
    054            }
    055        }
    056
    057        /**
    058    * @see SCXMLListener#onTransition(TransitionTarget,TransitionTarget,Transition)
    059         */
    060        public void onTransition(final TransitionTarget from,
    061                final TransitionTarget to, final Transition transition) {
    062            if (log.isInfoEnabled()) {
    063                log.info(LogUtils.transToString(from, to, transition));
    064            }
    065        }
    066
    067    }
    068