1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany
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2 | //
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3 | // Licensed under the Apache License, Version 2.0 (the "License");
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4 | // you may not use this file except in compliance with the License.
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5 | // You may obtain a copy of the License at
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6 | //
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7 | // http://www.apache.org/licenses/LICENSE-2.0
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8 | //
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9 | // Unless required by applicable law or agreed to in writing, software
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10 | // distributed under the License is distributed on an "AS IS" BASIS,
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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12 | // See the License for the specific language governing permissions and
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13 | // limitations under the License.
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14 |
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15 | package de.ugoe.cs.autoquest.plugin.uml;
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16 |
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17 | import java.util.Collection;
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18 | import java.util.HashMap;
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19 | import java.util.Iterator;
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20 | import java.util.LinkedList;
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21 | import java.util.List;
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22 | import java.util.Map;
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23 | import java.util.Map.Entry;
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24 |
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25 | import org.eclipse.emf.common.util.EList;
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26 | import org.eclipse.uml2.uml.Comment;
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27 | import org.eclipse.uml2.uml.Component;
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28 | import org.eclipse.uml2.uml.Connector;
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29 | import org.eclipse.uml2.uml.ConnectorEnd;
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30 | import org.eclipse.uml2.uml.Element;
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31 | import org.eclipse.uml2.uml.Interaction;
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32 | import org.eclipse.uml2.uml.InteractionFragment;
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33 | import org.eclipse.uml2.uml.Interface;
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34 | import org.eclipse.uml2.uml.Lifeline;
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35 | import org.eclipse.uml2.uml.Message;
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36 | import org.eclipse.uml2.uml.MessageOccurrenceSpecification;
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37 | import org.eclipse.uml2.uml.MessageSort;
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38 | import org.eclipse.uml2.uml.Model;
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39 | import org.eclipse.uml2.uml.Operation;
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40 | import org.eclipse.uml2.uml.Port;
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41 | import org.eclipse.uml2.uml.Region;
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42 | import org.eclipse.uml2.uml.StateMachine;
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43 | import org.eclipse.uml2.uml.Transition;
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44 | import org.eclipse.uml2.uml.UMLPackage;
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45 | import org.eclipse.uml2.uml.Vertex;
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46 |
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47 | import de.ugoe.cs.autoquest.eventcore.Event;
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48 | import de.ugoe.cs.autoquest.plugin.http.eventcore.SOAPEventType;
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49 | import de.ugoe.cs.autoquest.plugin.http.eventcore.SimpleSOAPEventType;
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50 | import de.ugoe.cs.autoquest.plugin.uml.eventcore.UMLTransitionType;
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51 | import de.ugoe.cs.autoquest.usageprofiles.TrieBasedModel;
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52 |
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53 | /**
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54 | * <p>
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55 | * Utilities for working with UML.
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56 | * </p>
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57 | *
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58 | * @author Steffen Herbold
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59 | */
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60 | public class UMLUtils {
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61 |
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62 | /**
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63 | * <p>
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64 | * Creates a sequence of events with {@link UMLTransitionType} as event type from a given
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65 | * sequence of events with the {@link SOAPEventType}, by matching the sequences to a state
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66 | * machine.
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67 | * </p>
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68 | *
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69 | * @param sequence
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70 | * SOAP sequences
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71 | * @param stateMachine
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72 | * the state machine
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73 | * @return create UML sequences
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74 | */
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75 | public static List<Event> createUMLTransitionSequence(List<Event> sequence,
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76 | StateMachine stateMachine)
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77 | {
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78 | List<List<Transition>> matchingSequences =
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79 | determineMatchingTransitionSequences(sequence, stateMachine);
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80 |
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81 | if (matchingSequences.size() != 1) {
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82 | throw new RuntimeException("no unique match found; " + matchingSequences.size() +
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83 | " matches");
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84 | }
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85 | List<Event> umlEventSequence = new LinkedList<>();
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86 | for (Transition transition : matchingSequences.get(0)) {
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87 | umlEventSequence.add(new Event(new UMLTransitionType(transition)));
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88 | }
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89 | return umlEventSequence;
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90 | }
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91 |
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92 | /**
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93 | * <p>
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94 | * Uses a sequences of events with the {@link UMLTransitionType} to determine the transition
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95 | * probabilities for the state machine.
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96 | * </p>
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97 | *
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98 | * @param sequences
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99 | * UML sequences
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100 | * @param stateMachine
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101 | * state machine to be converted to a usage profile
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102 | */
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103 | public static void convertStateMachineToUsageProfile(Collection<List<Event>> sequences,
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104 | StateMachine stateMachine)
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105 | {
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106 | // create state->outgoings hashmap
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107 | Map<Vertex, Map<Transition, Integer>> stateMap = new HashMap<>();
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108 | for (Region region : stateMachine.getRegions()) {
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109 | for (Vertex state : region.getSubvertices()) {
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110 | stateMap.put(state, new HashMap<Transition, Integer>());
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111 | }
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112 | }
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113 |
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114 | // create counters for each transition
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115 | for (List<Event> sequence : sequences) {
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116 | for (Event event : sequence) {
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117 | if (event.getType() instanceof UMLTransitionType) {
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118 | Transition transition = ((UMLTransitionType) event.getType()).getTransition();
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119 | Map<Transition, Integer> transitionMap = stateMap.get(transition.getSource());
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120 | Integer value = transitionMap.get(transition);
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121 | if (value == null) {
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122 | value = 0;
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123 | }
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124 | transitionMap.put(transition, value + 1);
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125 | }
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126 | else {
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127 | throw new RuntimeException(
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128 | "Wrong event type. Only UMLTransitionType supported but was: " +
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129 | event.getType().getClass().getName());
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130 | }
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131 | }
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132 | }
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133 |
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134 | // calculate probabilities
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135 | for (Region region : stateMachine.getRegions()) {
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136 | for (Vertex state : region.getSubvertices()) {
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137 | Map<Transition, Integer> transitionMap = stateMap.get(state);
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138 | int totalCount = 0;
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139 | for (Entry<Transition, Integer> entry : transitionMap.entrySet()) {
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140 | totalCount += entry.getValue();
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141 | }
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142 | if (totalCount != 0) {
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143 | for (Transition transition : state.getOutgoings()) {
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144 | double prob = 0.0d;
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145 | if (transitionMap.containsKey(transition)) {
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146 | prob = ((double) transitionMap.get(transition)) / totalCount;
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147 | }
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148 | Comment comment = transition.createOwnedComment();
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149 | comment.setBody("" + prob);
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150 | }
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151 | }
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152 | else {
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153 | // system has never been in this state, all transitions equally likely
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154 | int numOutgoings = state.getOutgoings().size();
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155 | for (Transition transition : state.getOutgoings()) {
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156 | Comment comment = transition.createOwnedComment();
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157 | comment.setBody("" + (1.0d / numOutgoings));
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158 | }
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159 | }
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160 | }
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161 | }
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162 | }
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163 |
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164 | /**
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165 | * <p>
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166 | * Determines all matching {@link Transition} sequences in a state machine for a given sequence
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167 | * of SOAP events.
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168 | * </p>
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169 | *
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170 | * @param sequence
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171 | * SOAP sequence
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172 | * @param stateMachine
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173 | * the state machine
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174 | * @return all matching {@link Transition} sequences
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175 | */
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176 | public static List<List<Transition>> determineMatchingTransitionSequences(List<Event> sequence,
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177 | StateMachine stateMachine)
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178 | {
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179 | EList<Region> regions = stateMachine.getRegions();
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180 | EList<Vertex> states = null;
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181 | for (Region region : regions) {
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182 | if (states == null) {
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183 | states = region.getSubvertices();
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184 | }
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185 | else {
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186 | states.addAll(region.getSubvertices());
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187 | }
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188 | }
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189 | List<Transition> allTransitions = new LinkedList<>();
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190 | for (Vertex state : states) {
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191 | allTransitions.addAll(state.getOutgoings());
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192 | }
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193 |
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194 | List<List<Transition>> matchingSequences = null;
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195 | List<Transition> currentTransitions = null;
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196 |
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197 | // first, we try to find a single unique transition that we can match using the method name
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198 | for (Iterator<Event> eventIterator = sequence.iterator(); eventIterator.hasNext();) {
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199 | Event event = eventIterator.next();
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200 | if (event.getType() instanceof SOAPEventType) {
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201 | SOAPEventType eventType = (SOAPEventType) event.getType();
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202 | if (matchingSequences == null) {
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203 | matchingSequences = new LinkedList<>();
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204 | List<Transition> initialMatches = matchTransitions(allTransitions, eventType);
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205 | for (Transition transition : initialMatches) {
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206 | List<Transition> candidate = new LinkedList<>();
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207 | candidate.add(transition);
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208 | matchingSequences.add(candidate);
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209 | }
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210 | currentTransitions = initialMatches;
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211 | }
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212 | else {
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213 | List<List<Transition>> nextMatchingSequences = new LinkedList<>();
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214 | List<Transition> nextCurrentTransitions = new LinkedList<>();
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215 | Iterator<Transition> currentTransitionIterator = currentTransitions.iterator();
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216 | Iterator<List<Transition>> currentMatchingSequencesIterator =
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217 | matchingSequences.iterator();
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218 | while (currentTransitionIterator.hasNext()) {
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219 | Transition currentTransition = currentTransitionIterator.next();
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220 | List<Transition> currentMatch = currentMatchingSequencesIterator.next();
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221 |
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222 | List<Transition> matches =
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223 | matchTransitions(currentTransition.getTarget().getOutgoings(),
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224 | eventType);
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225 | if (matches.isEmpty()) {
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226 | throw new RuntimeException("no matches found");
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227 | }
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228 | for (Transition matchingTransition : matches) {
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229 | List<Transition> candidate = new LinkedList<>(currentMatch);
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230 | candidate.add(matchingTransition);
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231 | nextMatchingSequences.add(candidate);
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232 | nextCurrentTransitions.add(matchingTransition);
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233 | }
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234 | }
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235 | matchingSequences = nextMatchingSequences;
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236 | currentTransitions = nextCurrentTransitions;
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237 | }
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238 | }
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239 | else {
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240 | throw new RuntimeException(
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241 | "Wrong event type. Only UMLTransitionType supported but was: " +
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242 | event.getType().getClass().getName());
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243 | }
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244 | }
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245 | return matchingSequences;
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246 | }
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247 |
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248 | /**
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249 | * <p>
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250 | * Extends a given model with an interaction that represents an observed sequence.
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251 | * </p>
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252 | *
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253 | * @param sequence
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254 | * sequence that is added as sequence diagram
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255 | * @param model
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256 | * UML model to which the interaction is added
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257 | * @param interactionName
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258 | * name of the interaction
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259 | */
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260 | public static void createInteractionFromEventSequence(List<Event> sequence,
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261 | Model model,
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262 | String interactionName)
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263 | {
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264 | Map<String, Interface> interfaceMap = new HashMap<>();
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265 | Map<String, Port> portMap = new HashMap<>();
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266 |
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267 | EList<Element> elements = model.getOwnedElements();
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268 | for (Element element : elements) {
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269 | if (element instanceof Interface) {
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270 | interfaceMap.put(((Interface) element).getName(), (Interface) element);
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271 | }
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272 | }
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273 |
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274 | Interaction interaction =
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275 | (Interaction) model.createPackagedElement(interactionName,
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276 | UMLPackage.Literals.INTERACTION);
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277 |
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278 | Lifeline userLifeline = interaction.createLifeline("user");
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279 |
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280 | Component testContext =
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281 | (Component) model.getPackagedElement("TestContext", true,
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282 | UMLPackage.Literals.COMPONENT, true);
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283 | userLifeline.setRepresents(testContext.getAttribute("user", null));
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284 |
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285 | Component userComponent =
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286 | (Component) model.getPackagedElement("User", true, UMLPackage.Literals.COMPONENT, true);
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287 | Port userPort = (Port) userComponent.getAttribute("p_user_rlus", null);
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288 |
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289 | int i = 0;
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290 | for (Event event : sequence) {
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291 | if (!(event.equals(Event.STARTEVENT) || event.equals(Event.ENDEVENT))) {
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292 | String serviceName = getServiceNameFromEvent(event);
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293 | String methodName = getCalledMethodFromEvent(event);
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294 |
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295 | Interface targetInterface = interfaceMap.get(serviceName);
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296 | if (targetInterface == null) {
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297 | throw new RuntimeException(
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298 | "Could not find interface in the UML model that belong to the service: " +
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299 | serviceName);
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300 | }
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301 |
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302 | Lifeline targetLifeline = interaction.getLifeline(serviceName);
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303 | if (targetLifeline == null) {
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304 | targetLifeline = interaction.createLifeline(serviceName);
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305 |
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306 | targetLifeline.setRepresents(testContext
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307 | .getAttribute(serviceName + "_property", null));
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308 |
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309 | Component component =
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310 | (Component) model.getPackagedElement(serviceName, true,
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311 | UMLPackage.Literals.COMPONENT, true);
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312 | portMap.put(serviceName,
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313 | (Port) component.getAttribute("p_" + serviceName, null));
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314 | }
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315 | MessageOccurrenceSpecification sendFragment =
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316 | (MessageOccurrenceSpecification) interaction
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317 | .createFragment(i + ":" + methodName + "_sendFragment",
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318 | UMLPackage.Literals.MESSAGE_OCCURRENCE_SPECIFICATION);
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319 | MessageOccurrenceSpecification recvFragment =
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320 | (MessageOccurrenceSpecification) interaction
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321 | .createFragment(i + ":" + methodName + "_recvFragment",
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322 | UMLPackage.Literals.MESSAGE_OCCURRENCE_SPECIFICATION);
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323 |
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324 | sendFragment.setCovered(userLifeline);
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325 | recvFragment.setCovered(targetLifeline);
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326 |
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327 | Message message = interaction.createMessage(methodName);
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328 | if (getOperationFromName(targetInterface.getOperations(), methodName) == null) {
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329 | System.out.println("operation not found: " + methodName);
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330 | }
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331 | message.setSignature(getOperationFromName(targetInterface.getOperations(),
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332 | methodName));
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333 | message.setMessageSort(MessageSort.ASYNCH_CALL_LITERAL);
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334 | message.setSendEvent(sendFragment);
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335 | message.setReceiveEvent(recvFragment);
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336 |
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337 | EList<ConnectorEnd> sourceEnds = userPort.getEnds();
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338 | EList<ConnectorEnd> targetEnds = portMap.get(serviceName).getEnds();
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339 |
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340 | for (ConnectorEnd sourceEnd : sourceEnds) {
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341 | Connector sourceConnector = (Connector) sourceEnd.eContainer();
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342 | for (ConnectorEnd targetEnd : targetEnds) {
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343 | Connector targetConnector = (Connector) targetEnd.eContainer();
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344 | if (targetConnector == sourceConnector) {
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345 | message.setConnector(targetConnector);
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346 | }
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347 | }
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348 | }
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349 |
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350 | sendFragment.setMessage(message);
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351 | recvFragment.setMessage(message);
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352 |
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353 | i++;
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354 | }
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355 | }
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356 | }
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357 |
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358 | /**
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359 | * <p>
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360 | * Calculates the usage score of an interaction as the logsum of the event probabilities
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361 | * multiplied with the length of the interaction.
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362 | * </p>
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363 | *
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364 | * @param interaction
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365 | * interaction for which the score is calculated
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366 | * @param usageProfile
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367 | * usage profile used for the calculation
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368 | * @return calculated usage score
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369 | */
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370 | public static double calculateUsageScore(Interaction interaction, TrieBasedModel usageProfile) {
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371 | double usageScore = 0.0d;
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372 |
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373 | EList<InteractionFragment> interactionFragments = interaction.getFragments();
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374 | List<Event> eventSequence = new LinkedList<>();
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375 | eventSequence.add(Event.STARTEVENT);
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376 | for (InteractionFragment interactionFragment : interactionFragments) {
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377 | if (interactionFragment.getName() != null &&
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378 | interactionFragment.getName().endsWith("_recvFragment"))
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379 | {
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380 | String serviceName =
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381 | interactionFragment.getCovereds().get(0).getRepresents().getName();
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382 | String methodName = "UNKNOWN";
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383 | if (interactionFragment instanceof MessageOccurrenceSpecification) {
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384 | methodName =
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385 | ((MessageOccurrenceSpecification) interactionFragment).getMessage()
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386 | .getName();
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387 | }
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388 | eventSequence.add(new Event(new SimpleSOAPEventType(methodName, serviceName)));
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389 | }
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390 | }
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391 | double prob = usageProfile.getLogSum(eventSequence);
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392 | usageScore = prob * eventSequence.size();
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393 |
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394 | return usageScore;
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395 | }
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396 |
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397 | /**
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398 | * <p>
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399 | * Helper function to get the name of a service from a SOAP event.
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400 | * </p>
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401 | *
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402 | * @param event
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403 | * event for which the service name is retrieved
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404 | * @return service name
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405 | */
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406 | private static String getServiceNameFromEvent(Event event) {
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407 | if (event.getType() instanceof SOAPEventType) {
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408 | return ((SOAPEventType) event.getType()).getServiceName();
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409 | }
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410 | else if (event.getType() instanceof SimpleSOAPEventType) {
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411 | return ((SimpleSOAPEventType) event.getType()).getServiceName();
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412 | }
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413 | else {
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414 | throw new RuntimeException(
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415 | "Wrong event type. Only SOAPEventType and SimpleSOAPEventType supported but was: " +
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416 | event.getType().getClass().getName());
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417 | }
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418 | }
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419 |
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420 | /**
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421 | *
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422 | * <p>
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423 | * Helper function to get the called method from a SOAP event
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424 | * </p>
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425 | *
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426 | * @param event
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427 | * event for which the called method is retrieved
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428 | * @return called method
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429 | */
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430 | private static String getCalledMethodFromEvent(Event event) {
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431 | if (event.getType() instanceof SOAPEventType) {
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432 | return ((SOAPEventType) event.getType()).getCalledMethod();
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433 | }
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434 | else if (event.getType() instanceof SimpleSOAPEventType) {
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435 | return ((SimpleSOAPEventType) event.getType()).getCalledMethod();
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436 | }
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437 | else {
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438 | throw new RuntimeException(
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439 | "Wrong event type. Only SOAPEventType and SimpleSOAPEventType supported but was: " +
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440 | event.getType().getClass().getName());
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441 | }
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442 | }
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443 |
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444 | /**
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445 | * <p>
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446 | * Fetches an operation using only its name from a list of operations. Returns the first match
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447 | * found or null if no match is found.
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448 | * </p>
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449 | *
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450 | * @param operations
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451 | * list of operations
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452 | * @param name
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453 | * name of the operation
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454 | * @return first matching operation; null if no match is found
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455 | */
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456 | private static Operation getOperationFromName(EList<Operation> operations, String name) {
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457 | if (name == null) {
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458 | throw new IllegalArgumentException("name of the operation must not be null");
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459 | }
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460 | if (operations != null) {
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461 | for (Operation operation : operations) {
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462 | if (operation.getName() != null && operation.getName().equals(name)) {
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463 | return operation;
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464 | }
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465 | }
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466 | }
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467 | return null;
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468 | }
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469 |
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470 | /**
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471 | * <p>
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472 | * Determines which transitions match a given {@link SOAPEventType}.
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473 | * </p>
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474 | *
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475 | * @param transitions
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476 | * the transitions
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477 | * @param eventType
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478 | * the SOAP event
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479 | * @return matching transitions
|
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480 | */
|
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481 | private static List<Transition> matchTransitions(List<Transition> transitions,
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482 | SOAPEventType eventType)
|
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483 | {
|
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484 | List<Transition> matching = new LinkedList<>();
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485 | for (Transition transition : transitions) {
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486 | // String serviceName = transition.getName().split("\\.")[0]; // TODO service name check
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487 | String methodName = transition.getName().split("\\.")[1];
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488 | if (methodName.equals(eventType.getCalledMethod())) {
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489 | matching.add(transition);
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490 | }
|
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491 | }
|
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492 | return matching;
|
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493 | }
|
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494 |
|
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495 | }
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