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

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

 1  
 /*
 2  
  *
 3  
  *   Copyright 2005 The Apache Software Foundation.
 4  
  *
 5  
  *  Licensed under the Apache License, Version 2.0 (the "License");
 6  
  *  you may not use this file except in compliance with the License.
 7  
  *  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  
  */
 18  
 package org.apache.commons.scxml.env;
 19  
 
 20  
 import java.util.Iterator;
 21  
 import java.util.LinkedList;
 22  
 
 23  
 import org.apache.commons.scxml.model.Transition;
 24  
 import org.apache.commons.scxml.model.TransitionTarget;
 25  
 
 26  
 /**
 27  
  * Helper methods for Commons SCXML logging.
 28  
  *
 29  
  */
 30  
 public final class LogUtils {
 31  
 
 32  
     /**
 33  
      * Create a human readable log view of this transition.
 34  
      *
 35  
      * @param from The source TransitionTarget
 36  
      * @param to The destination TransitionTarget
 37  
      * @param transition The Transition that is taken
 38  
      * @return String The human readable log entry
 39  
      */
 40  
     public static String transToString(final TransitionTarget from,
 41  
             final TransitionTarget to, final Transition transition) {
 42  1
         StringBuffer buf = new StringBuffer("transition (");
 43  1
         buf.append("event = ").append(transition.getEvent());
 44  1
         buf.append(", cond = ").append(transition.getCond());
 45  1
         buf.append(", from = ").append(getTTPath(from));
 46  1
         buf.append(", to = ").append(getTTPath(to));
 47  1
         buf.append(')');
 48  1
         return buf.toString();
 49  
     }
 50  
 
 51  
     /**
 52  
      * Write out this TransitionTarget location in a XPath style format.
 53  
      *
 54  
      * @param tt The TransitionTarget whose "path" is to needed
 55  
      * @return String The XPath style location of the TransitionTarget within
 56  
      *                the SCXML document
 57  
      */
 58  
     public static String getTTPath(final TransitionTarget tt) {
 59  4
         TransitionTarget parent = tt.getParent();
 60  4
         if (parent == null) {
 61  3
             return "/" + tt.getId();
 62  
         } else {
 63  1
             LinkedList pathElements = new LinkedList();
 64  1
             pathElements.addFirst(tt);
 65  3
             while (parent != null) {
 66  2
                 pathElements.addFirst(parent);
 67  2
                 parent = parent.getParent();
 68  
             }
 69  1
             StringBuffer names = new StringBuffer();
 70  1
             for (Iterator i = pathElements.iterator(); i.hasNext();) {
 71  3
                 TransitionTarget pathElement = (TransitionTarget) i.next();
 72  3
                 names.append('/').append(pathElement.getId());
 73  
             }
 74  1
             return names.toString();
 75  
         }
 76  
     }
 77  
 
 78  
     /**
 79  
      * Discourage instantiation since this is a utility class.
 80  
      */
 81  
     private LogUtils() {
 82  0
         super();
 83  0
     }
 84  
 
 85  
 }