Coverage Report - org.apache.commons.scxml.env.LogUtils

Classes in this File Line Coverage Branch Coverage Complexity
LogUtils
91% 
100% 
2.333

 1  
 /*
 2  
  * Licensed to the Apache Software Foundation (ASF) under one or more
 3  
  * contributor license agreements.  See the NOTICE file distributed with
 4  
  * this work for additional information regarding copyright ownership.
 5  
  * The ASF licenses this file to You under the Apache License, Version 2.0
 6  
  * (the "License"); you may not use this file except in compliance with
 7  
  * the License.  You may obtain a copy of the License at
 8  
  *
 9  
  *     http://www.apache.org/licenses/LICENSE-2.0
 10  
  *
 11  
  * Unless required by applicable law or agreed to in writing, software
 12  
  * distributed under the License is distributed on an "AS IS" BASIS,
 13  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 14  
  * See the License for the specific language governing permissions and
 15  
  * limitations under the License.
 16  
  */
 17  
 package org.apache.commons.scxml.env;
 18  
 
 19  
 import java.util.Iterator;
 20  
 import java.util.LinkedList;
 21  
 
 22  
 import org.apache.commons.scxml.model.Transition;
 23  
 import org.apache.commons.scxml.model.TransitionTarget;
 24  
 
 25  
 /**
 26  
  * Helper methods for Commons SCXML logging.
 27  
  *
 28  
  */
 29  
 public final class LogUtils {
 30  
 
 31  
     /**
 32  
      * Create a human readable log view of this transition.
 33  
      *
 34  
      * @param from The source TransitionTarget
 35  
      * @param to The destination TransitionTarget
 36  
      * @param transition The Transition that is taken
 37  
      * @return String The human readable log entry
 38  
      */
 39  
     public static String transToString(final TransitionTarget from,
 40  
             final TransitionTarget to, final Transition transition) {
 41  1
         StringBuffer buf = new StringBuffer("transition (");
 42  1
         buf.append("event = ").append(transition.getEvent());
 43  1
         buf.append(", cond = ").append(transition.getCond());
 44  1
         buf.append(", from = ").append(getTTPath(from));
 45  1
         buf.append(", to = ").append(getTTPath(to));
 46  1
         buf.append(')');
 47  1
         return buf.toString();
 48  
     }
 49  
 
 50  
     /**
 51  
      * Write out this TransitionTarget location in a XPath style format.
 52  
      *
 53  
      * @param tt The TransitionTarget whose "path" is to needed
 54  
      * @return String The XPath style location of the TransitionTarget within
 55  
      *                the SCXML document
 56  
      */
 57  
     public static String getTTPath(final TransitionTarget tt) {
 58  4
         TransitionTarget parent = tt.getParent();
 59  4
         if (parent == null) {
 60  3
             return "/" + tt.getId();
 61  
         } else {
 62  1
             LinkedList pathElements = new LinkedList();
 63  1
             pathElements.addFirst(tt);
 64  3
             while (parent != null) {
 65  2
                 pathElements.addFirst(parent);
 66  2
                 parent = parent.getParent();
 67  
             }
 68  1
             StringBuffer names = new StringBuffer();
 69  1
             for (Iterator i = pathElements.iterator(); i.hasNext();) {
 70  3
                 TransitionTarget pathElement = (TransitionTarget) i.next();
 71  3
                 names.append('/').append(pathElement.getId());
 72  
             }
 73  1
             return names.toString();
 74  
         }
 75  
     }
 76  
 
 77  
     /**
 78  
      * Discourage instantiation since this is a utility class.
 79  
      */
 80  
     private LogUtils() {
 81  0
         super();
 82  0
     }
 83  
 
 84  
 }