| /* |
| * 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.env; |
| |
| import org.apache.commons.scxml2.model.Transition; |
| import org.apache.commons.scxml2.model.TransitionTarget; |
| |
| /** |
| * Helper methods for Commons SCXML logging. |
| * |
| */ |
| public final class LogUtils { |
| |
| /** |
| * Create a human readable log view of this transition. |
| * |
| * @param from The source TransitionTarget |
| * @param to The destination TransitionTarget |
| * @param transition The Transition that is taken |
| * @param event The event name triggering the transition |
| * @return String The human readable log entry |
| */ |
| public static String transToString(final TransitionTarget from, |
| final TransitionTarget to, final Transition transition, String event) { |
| return "(" + "event = " + event + |
| ", cond = " + transition.getCond() + |
| ", from = " + getTTPath(from) + |
| ", to = " + getTTPath(to) + |
| ')'; |
| } |
| |
| /** |
| * Write out this TransitionTarget location in a XPath style format. |
| * |
| * @param tt The TransitionTarget whose "path" is to needed |
| * @return String The XPath style location of the TransitionTarget within |
| * the SCXML document |
| */ |
| public static String getTTPath(final TransitionTarget tt) { |
| StringBuilder sb = new StringBuilder("/"); |
| for (int i = 0; i < tt.getNumberOfAncestors(); i++) { |
| sb.append(tt.getAncestor(i).getId()); |
| sb.append("/"); |
| } |
| sb.append(tt.getId()); |
| return sb.toString(); |
| } |
| |
| /** |
| * Discourage instantiation since this is a utility class. |
| */ |
| private LogUtils() { |
| } |
| |
| } |