Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
LogUtils |
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1 | /* |
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2 | * |
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3 | * Copyright 2005 The Apache Software Foundation. |
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4 | * |
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5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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6 | * you may not use this file except in compliance with the License. |
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7 | * You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | * |
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17 | */ |
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18 | package org.apache.commons.scxml.env; |
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19 | ||
20 | import java.util.Iterator; |
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21 | import java.util.LinkedList; |
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22 | ||
23 | import org.apache.commons.scxml.model.Transition; |
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24 | import org.apache.commons.scxml.model.TransitionTarget; |
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25 | ||
26 | /** |
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27 | * Helper methods for Commons SCXML logging. |
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28 | * |
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29 | */ |
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30 | public final class LogUtils { |
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31 | ||
32 | /** |
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33 | * Create a human readable log view of this transition. |
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34 | * |
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35 | * @param from The source TransitionTarget |
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36 | * @param to The destination TransitionTarget |
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37 | * @param transition The Transition that is taken |
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38 | * @return String The human readable log entry |
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39 | */ |
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40 | public static String transToString(final TransitionTarget from, |
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41 | final TransitionTarget to, final Transition transition) { |
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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 | } |
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50 | ||
51 | /** |
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52 | * Write out this TransitionTarget location in a XPath style format. |
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53 | * |
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54 | * @param tt The TransitionTarget whose "path" is to needed |
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55 | * @return String The XPath style location of the TransitionTarget within |
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56 | * the SCXML document |
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57 | */ |
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58 | public static String getTTPath(final TransitionTarget tt) { |
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59 | 4 | TransitionTarget parent = tt.getParent(); |
60 | 4 | if (parent == null) { |
61 | 3 | return "/" + tt.getId(); |
62 | } else { |
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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 | } |
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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 | } |
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74 | 1 | return names.toString(); |
75 | } |
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76 | } |
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77 | ||
78 | /** |
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79 | * Discourage instantiation since this is a utility class. |
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80 | */ |
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81 | private LogUtils() { |
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82 | 0 | super(); |
83 | 0 | } |
84 | ||
85 | } |