svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.api / src / main / java / org / gvsig / fmap / dal / feature / FeatureQueryOrder.java @ 40435
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1 | 40435 | jjdelcerro | package org.gvsig.fmap.dal.feature; |
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2 | |||
3 | import java.util.ArrayList; |
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4 | import java.util.Comparator; |
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5 | import java.util.Iterator; |
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6 | import java.util.List; |
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7 | |||
8 | import org.gvsig.fmap.dal.exception.DataEvaluatorRuntimeException; |
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9 | import org.gvsig.tools.evaluator.Evaluator; |
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10 | import org.gvsig.tools.evaluator.EvaluatorData; |
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11 | import org.gvsig.tools.evaluator.EvaluatorException; |
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12 | import org.gvsig.tools.lang.Cloneable; |
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13 | import org.gvsig.tools.persistence.Persistent; |
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14 | import org.gvsig.tools.persistence.PersistentState; |
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15 | import org.gvsig.tools.persistence.exception.PersistenceException; |
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16 | |||
17 | public class FeatureQueryOrder implements Persistent, Cloneable { |
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18 | |||
19 | private List members = new ArrayList(); |
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20 | |||
21 | public class FeatureQueryOrderMember implements Persistent, Cloneable { |
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22 | String attributeName = null; |
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23 | Evaluator evaluator = null;
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24 | boolean ascending;
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25 | |||
26 | FeatureQueryOrderMember(String attributeName, boolean ascending) { |
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27 | this.attributeName = attributeName;
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28 | this.ascending = ascending;
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29 | } |
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30 | FeatureQueryOrderMember(Evaluator evaluator, boolean ascending) {
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31 | this.evaluator = evaluator;
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32 | this.ascending = ascending;
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33 | } |
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34 | public boolean hasEvaluator() { |
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35 | return this.evaluator != null; |
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36 | } |
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37 | public Evaluator getEvaluator() {
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38 | return this.evaluator; |
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39 | } |
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40 | public boolean getAscending() { |
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41 | return this.ascending; |
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42 | } |
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43 | public String getAttributeName() { |
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44 | return this.attributeName; |
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45 | } |
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46 | public void loadFromState(PersistentState state) |
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47 | throws PersistenceException {
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48 | this.attributeName = state.getString("attributeName"); |
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49 | this.ascending = state.getBoolean("ascending"); |
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50 | this.evaluator = (Evaluator) state.get("evaluator"); |
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51 | } |
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52 | |||
53 | public void saveToState(PersistentState state) |
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54 | throws PersistenceException {
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55 | state.set("attributeName", this.attributeName); |
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56 | state.set("ascending", this.ascending); |
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57 | if (this.evaluator != null) { |
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58 | state.set("evaluator", evaluator);
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59 | } |
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60 | |||
61 | } |
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62 | |||
63 | public Object clone() throws CloneNotSupportedException { |
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64 | // Nothing more to clone
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65 | return super.clone(); |
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66 | } |
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67 | } |
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68 | |||
69 | public Object add(String attributeName, boolean ascending) { |
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70 | FeatureQueryOrderMember member = new FeatureQueryOrderMember(
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71 | attributeName, ascending); |
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72 | if( members.add(member) ) {
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73 | return member;
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74 | } |
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75 | return null; |
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76 | } |
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77 | |||
78 | public Object add(Evaluator evaluator, boolean ascending) { |
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79 | FeatureQueryOrderMember member = new FeatureQueryOrderMember(
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80 | evaluator, |
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81 | ascending); |
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82 | if (members.add(member)) {
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83 | return member;
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84 | } |
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85 | return null; |
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86 | } |
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87 | |||
88 | public Iterator iterator() { |
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89 | return members.iterator();
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90 | } |
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91 | |||
92 | public boolean remove(FeatureQueryOrderMember member) { |
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93 | return members.remove(member);
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94 | } |
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95 | |||
96 | public void remove(int index) { |
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97 | members.remove(index); |
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98 | } |
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99 | |||
100 | public void clear() { |
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101 | members.clear(); |
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102 | } |
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103 | |||
104 | public int size() { |
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105 | return this.members.size(); |
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106 | } |
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107 | |||
108 | public Comparator getFeatureComparator() { |
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109 | return new DefaultFeatureComparator(this); |
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110 | } |
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111 | |||
112 | public Object clone() throws CloneNotSupportedException { |
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113 | FeatureQueryOrder clone = (FeatureQueryOrder) super.clone();
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114 | |||
115 | if (members != null) { |
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116 | clone.members = new ArrayList(members.size()); |
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117 | for (int i = 0; i < members.size(); i++) { |
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118 | clone.members.add(((Cloneable) members.get(i)).clone());
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119 | } |
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120 | } |
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121 | |||
122 | return clone;
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123 | } |
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124 | |||
125 | public FeatureQueryOrder getCopy() {
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126 | FeatureQueryOrder aCopy = new FeatureQueryOrder();
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127 | Iterator iter = this.members.iterator(); |
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128 | FeatureQueryOrderMember member; |
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129 | while (iter.hasNext()) {
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130 | member = (FeatureQueryOrderMember) iter.next(); |
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131 | if (member.hasEvaluator()) {
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132 | aCopy.add(member.getEvaluator(), member.getAscending()); |
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133 | } else {
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134 | aCopy.add(member.getAttributeName(), member.getAscending()); |
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135 | } |
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136 | } |
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137 | return aCopy;
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138 | } |
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139 | |||
140 | public void loadFromState(PersistentState state) |
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141 | throws PersistenceException {
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142 | this.members = (List) state.get("menbers"); |
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143 | } |
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144 | |||
145 | public void saveToState(PersistentState state) throws PersistenceException { |
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146 | state.set("menbers", members);
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147 | } |
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148 | |||
149 | private class DefaultFeatureComparator implements Comparator { |
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150 | |||
151 | private FeatureQueryOrder order;
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152 | |||
153 | |||
154 | public DefaultFeatureComparator(FeatureQueryOrder order) {
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155 | this.order = order;
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156 | // TODO optimizar en un array???
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157 | |||
158 | } |
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159 | |||
160 | |||
161 | private int myCompare(Object arg0, Object arg1) { |
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162 | if (arg0 == null){ |
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163 | if (arg1 == null){ |
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164 | return 0; |
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165 | } else{
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166 | return 1; |
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167 | } |
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168 | } else if (arg1 == null){ |
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169 | if (arg0 == null) { |
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170 | return 0; |
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171 | } else {
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172 | return 1; |
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173 | } |
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174 | } |
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175 | if (arg0 instanceof Comparable) { |
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176 | return ((Comparable) arg0).compareTo(arg1); |
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177 | } else if (arg1 instanceof Comparable) { |
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178 | return ((Comparable) arg1).compareTo(arg0) * -1; |
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179 | } |
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180 | |||
181 | if (arg0.equals(arg1)){
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182 | return 0; |
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183 | } else{
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184 | return -1; |
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185 | } |
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186 | |||
187 | } |
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188 | |||
189 | public int compare(Object arg0, Object arg1) { |
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190 | Iterator iter = this.order.iterator(); |
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191 | int returnValue = 0; |
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192 | Feature f0 = (Feature) arg0; |
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193 | Feature f1 = (Feature) arg1; |
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194 | Object item;
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195 | String attrName;
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196 | Evaluator evaluator; |
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197 | while (returnValue == 0 && iter.hasNext()) { |
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198 | item = iter.next(); |
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199 | if (item instanceof String) { |
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200 | attrName = (String) item;
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201 | returnValue = this
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202 | .myCompare(f0.get(attrName), f1 |
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203 | .get(attrName)); |
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204 | } else {
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205 | evaluator = (Evaluator) item; |
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206 | try {
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207 | returnValue = this.myCompare(evaluator
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208 | .evaluate((EvaluatorData) f0), evaluator |
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209 | .evaluate((EvaluatorData) f1)); |
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210 | } catch (EvaluatorException e) {
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211 | throw new DataEvaluatorRuntimeException(e); |
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212 | } |
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213 | } |
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214 | } |
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215 | |||
216 | return returnValue;
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217 | } |
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218 | |||
219 | } |
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220 | |||
221 | } |