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.tasktrees; |
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16 | |
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17 | import java.util.ArrayList; |
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18 | import java.util.HashMap; |
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19 | import java.util.LinkedList; |
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20 | import java.util.List; |
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21 | import java.util.Map; |
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22 | import java.util.regex.Matcher; |
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23 | import java.util.regex.Pattern; |
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24 | |
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25 | import de.ugoe.cs.autoquest.eventcore.Event; |
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26 | import de.ugoe.cs.autoquest.eventcore.IEventTarget; |
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27 | import de.ugoe.cs.autoquest.eventcore.IEventType; |
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28 | import de.ugoe.cs.autoquest.eventcore.StringEventType; |
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29 | import de.ugoe.cs.autoquest.eventcore.gui.TextInput; |
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30 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTask; |
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31 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTaskInstance; |
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32 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIteration; |
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33 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIterationInstance; |
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34 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IOptional; |
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35 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IOptionalInstance; |
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36 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelection; |
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37 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelectionInstance; |
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38 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequence; |
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39 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequenceInstance; |
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40 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask; |
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41 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskBuilder; |
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42 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskFactory; |
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43 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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44 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceList; |
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45 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IUserSession; |
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46 | import de.ugoe.cs.autoquest.test.DummyGUIElement; |
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47 | import de.ugoe.cs.autoquest.test.DummyTextField; |
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48 | |
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49 | /** |
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50 | * TODO comment |
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51 | * |
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52 | * @version $Revision: $ $Date: 01.04.2012$ |
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53 | * @author 2012, last modified by $Author: patrick$ |
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54 | */ |
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55 | public class TaskTreeDecoder { |
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56 | |
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57 | /** */ |
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58 | private static Pattern taskInstancePattern = Pattern.compile("([^{}]+)\\{|\\}"); |
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59 | |
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60 | /** */ |
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61 | private static Pattern taskInstanceDetailsPattern = |
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62 | Pattern.compile("\\s*(\\w*)\\s*([\\w\\(\\)\"]*)\\s*(\\(([\\w*\\s*]*)\\))?((\\w*)|(\".*\"))?"); |
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63 | |
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64 | /** */ |
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65 | private ITaskFactory taskFactory; |
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66 | |
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67 | /** */ |
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68 | private ITaskBuilder taskBuilder; |
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69 | |
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70 | /** */ |
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71 | Map<String, IEventTarget> targets = new HashMap<String, IEventTarget>(); |
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72 | |
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73 | /** */ |
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74 | Map<String, ITask> tasks = new HashMap<String, ITask>(); |
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75 | |
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76 | /** |
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77 | * |
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78 | */ |
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79 | public TaskTreeDecoder(ITaskFactory taskFactory, ITaskBuilder taskBuilder) { |
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80 | super(); |
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81 | this.taskFactory = taskFactory; |
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82 | this.taskBuilder = taskBuilder; |
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83 | } |
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84 | |
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85 | /** |
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86 | * |
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87 | */ |
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88 | public ITaskInstanceList decode(String taskTreeSpec) { |
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89 | ITaskInstanceList taskInstanceList = null; |
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90 | |
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91 | Matcher taskMatcher = taskInstancePattern.matcher(taskTreeSpec); |
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92 | |
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93 | if (taskMatcher.find()) { |
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94 | taskInstanceList = parseTaskInstanceList(taskMatcher); |
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95 | } |
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96 | |
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97 | if (taskMatcher.find()) { |
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98 | throw new IllegalArgumentException("too many tasks specified"); |
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99 | } |
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100 | |
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101 | return taskInstanceList; |
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102 | } |
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103 | |
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104 | /** |
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105 | * |
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106 | */ |
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107 | private ITaskInstanceList parseTaskInstanceList(Matcher taskMatcher) { |
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108 | if ("}".equals(taskMatcher.group(1))) { |
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109 | throw new IllegalArgumentException("invalid task instance list specification"); |
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110 | } |
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111 | |
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112 | String taskDetails = taskMatcher.group(1); |
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113 | |
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114 | Matcher matcher = taskInstanceDetailsPattern.matcher(taskDetails); |
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115 | |
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116 | if (!matcher.find()) { |
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117 | throw new IllegalArgumentException("could not parse task details"); |
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118 | } |
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119 | |
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120 | String type = matcher.group(1); |
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121 | |
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122 | ITaskInstanceList list; |
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123 | |
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124 | if ("UserSession".equals(type)) { |
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125 | list = taskFactory.createUserSession(); |
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126 | } |
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127 | else if ("TaskInstances".equals(type)) { |
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128 | list = taskFactory.createNewTaskInstance(taskFactory.createNewSequence()); |
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129 | } |
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130 | else { |
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131 | throw new IllegalArgumentException("unknown type of task instance list: " + type); |
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132 | } |
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133 | |
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134 | while (taskMatcher.find() && !"}".equals(taskMatcher.group(0))) { |
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135 | ITaskInstance childInstance = parseTaskInstance(taskMatcher); |
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136 | |
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137 | if (!(list instanceof IUserSession)) { |
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138 | taskBuilder.addChild |
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139 | ((ISequence) ((ITaskInstance) list).getTask(), childInstance.getTask()); |
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140 | } |
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141 | |
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142 | taskBuilder.addTaskInstance(list, childInstance); |
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143 | } |
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144 | |
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145 | return list; |
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146 | } |
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147 | |
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148 | /** |
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149 | * |
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150 | */ |
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151 | private ITaskInstance parseTaskInstance(Matcher taskMatcher) { |
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152 | if ("}".equals(taskMatcher.group(1))) { |
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153 | throw new IllegalArgumentException("invalid task instance specification"); |
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154 | } |
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155 | |
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156 | String taskDetails = taskMatcher.group(1); |
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157 | |
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158 | Matcher matcher = taskInstanceDetailsPattern.matcher(taskDetails); |
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159 | |
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160 | if (!matcher.find()) { |
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161 | throw new IllegalArgumentException("could not parse task details"); |
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162 | } |
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163 | |
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164 | String type = matcher.group(1); |
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165 | String id = matcher.group(2); |
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166 | |
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167 | // determine the children before creating this instance |
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168 | List<ITaskInstance> children = new LinkedList<ITaskInstance>(); |
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169 | while (taskMatcher.find() && !"}".equals(taskMatcher.group(0))) { |
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170 | children.add(parseTaskInstance(taskMatcher)); |
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171 | } |
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172 | |
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173 | // get the model |
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174 | ITask task = getCreateTask(id, type, children); |
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175 | |
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176 | // create the respective instance |
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177 | ITaskInstance instance; |
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178 | |
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179 | if (task instanceof ISequence) { |
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180 | instance = taskFactory.createNewTaskInstance((ISequence) task); |
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181 | } |
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182 | else if (task instanceof ISelection) { |
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183 | instance = taskFactory.createNewTaskInstance((ISelection) task); |
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184 | } |
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185 | else if (task instanceof IIteration) { |
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186 | instance = taskFactory.createNewTaskInstance((IIteration) task); |
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187 | } |
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188 | else if (task instanceof IOptional) { |
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189 | instance = taskFactory.createNewTaskInstance((IOptional) task); |
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190 | } |
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191 | else { |
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192 | Event event = !task.getInstances().isEmpty() ? |
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193 | ((IEventTaskInstance) task.getInstances().iterator().next()).getEvent() : |
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194 | createUserInteractionEvent(type, id, matcher.group(4)); |
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195 | |
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196 | instance = taskFactory.createNewTaskInstance((IEventTask) task, event); |
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197 | } |
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198 | |
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199 | // add the children to the instance |
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200 | for (ITaskInstance childInstance : children) { |
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201 | if (instance instanceof ISequenceInstance) { |
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202 | taskBuilder.addChild((ISequenceInstance) instance, childInstance); |
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203 | } |
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204 | else if (instance instanceof ISelectionInstance) { |
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205 | if (((ISelectionInstance) instance).getChild() == null) { |
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206 | taskBuilder.setChild((ISelectionInstance) instance, childInstance); |
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207 | } |
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208 | else { |
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209 | throw new IllegalArgumentException("can not add several children to one " + |
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210 | "selection instance"); |
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211 | } |
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212 | } |
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213 | else if (instance instanceof IIterationInstance) { |
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214 | taskBuilder.addChild((IIterationInstance) instance, childInstance); |
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215 | } |
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216 | else if (instance instanceof IOptionalInstance) { |
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217 | if (((IOptionalInstance) instance).getChild() == null) { |
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218 | taskBuilder.setChild((IOptionalInstance) instance, childInstance); |
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219 | } |
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220 | else { |
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221 | throw new IllegalArgumentException("can not add several children to one " + |
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222 | "optional instance"); |
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223 | } |
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224 | } |
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225 | } |
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226 | |
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227 | // validate the instance |
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228 | try { |
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229 | new TaskTreeValidator().validate(instance); |
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230 | } |
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231 | catch (java.lang.AssertionError e) { |
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232 | throw new IllegalArgumentException(e.getMessage(), e); |
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233 | } |
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234 | |
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235 | return instance; |
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236 | } |
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237 | |
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238 | /** |
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239 | * <p> |
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240 | * TODO: comment |
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241 | * </p> |
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242 | * |
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243 | * @param id |
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244 | * @param type |
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245 | * @param children |
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246 | * @return |
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247 | */ |
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248 | private ITask getCreateTask(String id, String type, List<ITaskInstance> children) { |
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249 | ITask task = tasks.get(id); |
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250 | |
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251 | if (task == null) { |
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252 | if ("Sequence".equals(type)) { |
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253 | task = taskFactory.createNewSequence(); |
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254 | } |
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255 | else if ("Selection".equals(type)) { |
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256 | task = taskFactory.createNewSelection(); |
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257 | } |
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258 | else if ("Iteration".equals(type)) { |
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259 | task = taskFactory.createNewIteration(); |
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260 | } |
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261 | else if ("Optional".equals(type)) { |
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262 | task = taskFactory.createNewOptional(); |
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263 | } |
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264 | else { |
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265 | task = taskFactory.createNewEventTask(type + " --> " + id); |
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266 | } |
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267 | tasks.put(id, task); |
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268 | |
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269 | for (ITaskInstance childInstance : children) { |
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270 | if (task instanceof ISequence) { |
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271 | taskBuilder.addChild((ISequence) task, childInstance.getTask()); |
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272 | } |
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273 | else if (task instanceof ISelection) { |
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274 | taskBuilder.addChild((ISelection) task, childInstance.getTask()); |
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275 | } |
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276 | else if (task instanceof IIteration) { |
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277 | if (((IIteration) task).getMarkedTask() == null) { |
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278 | taskBuilder.setMarkedTask((IIteration) task, childInstance.getTask()); |
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279 | } |
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280 | else if (!((IIteration) task).getMarkedTask().equals(childInstance.getTask())) { |
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281 | throw new IllegalArgumentException |
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282 | ("can not add more than one child to an iteration"); |
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283 | } |
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284 | } |
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285 | else if (task instanceof IOptional) { |
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286 | if (((IOptional) task).getMarkedTask() == null) { |
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287 | taskBuilder.setMarkedTask((IOptional) task, childInstance.getTask()); |
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288 | } |
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289 | else if (!((IOptional) task).getMarkedTask().equals(childInstance.getTask())) { |
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290 | throw new IllegalArgumentException |
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291 | ("can not add more than one child to an optional"); |
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292 | } |
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293 | } |
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294 | else { |
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295 | throw new IllegalArgumentException("can not add children to something that " + |
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296 | "is no sequence, selection, iteration, or " + |
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297 | "optional"); |
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298 | } |
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299 | } |
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300 | } |
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301 | else if ("Selection".equals(type)) { |
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302 | // update the selection with further alternatives, if specified by the current |
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303 | // child instance |
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304 | if (children.size() == 1) { |
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305 | ITask newChildTask = children.get(0).getTask(); |
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306 | |
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307 | boolean found = false; |
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308 | for (ITask childTask : ((ISelection) task).getChildren()) { |
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309 | if (childTask.equals(newChildTask)) { |
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310 | found = true; |
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311 | break; |
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312 | } |
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313 | } |
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314 | |
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315 | if (!found) { |
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316 | taskBuilder.addChild((ISelection) task, newChildTask); |
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317 | } |
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318 | } |
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319 | } |
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320 | |
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321 | return task; |
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322 | } |
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323 | |
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324 | /** |
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325 | * <p> |
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326 | * </p> |
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327 | * |
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328 | * @param matcher |
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329 | * @return |
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330 | */ |
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331 | private Event createUserInteractionEvent(String type, String targetId, String furtherInfo) { |
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332 | IEventTarget eventTarget = targets.get(targetId); |
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333 | if (eventTarget == null) { |
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334 | eventTarget = determineTarget(type, targetId, furtherInfo); |
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335 | targets.put(targetId, eventTarget); |
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336 | } |
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337 | IEventType eventType = determineType(type, furtherInfo); |
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338 | |
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339 | return new Event(eventType, eventTarget); |
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340 | } |
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341 | |
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342 | /** |
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343 | * <p> |
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344 | * </p> |
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345 | * |
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346 | * @param type |
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347 | * @param id |
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348 | * @param enteredText |
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349 | * @return |
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350 | */ |
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351 | private IEventTarget determineTarget(String type, String id, String enteredText) { |
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352 | if ("TextInput".equals(type) && enteredText != null) { |
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353 | return new DummyTextField(enteredText); |
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354 | } |
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355 | else { |
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356 | return new DummyGUIElement(id); |
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357 | } |
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358 | } |
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359 | |
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360 | /** |
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361 | * <p> |
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362 | * </p> |
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363 | * |
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364 | * @param type |
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365 | * @param enteredText |
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366 | * @return |
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367 | */ |
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368 | private IEventType determineType(String type, String enteredText) { |
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369 | if ("TextInput".equals(type) && enteredText != null) { |
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370 | return new TextInput(enteredText, new ArrayList<Event>()); |
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371 | } |
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372 | else { |
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373 | return new StringEventType(type); |
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374 | } |
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375 | } |
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376 | |
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377 | } |
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