1 | /************************************************************************************ |
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2 | * Copyright (C) 2008 by Politehnica University of Bucharest and Rutgers University |
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3 | * All rights reserved. |
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4 | * Refer to LICENSE for terms and conditions of use. |
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5 | ***********************************************************************************/ |
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6 | package vnsim.map.object; |
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7 | |
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8 | /** |
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9 | * @author Victor-Radu |
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10 | */ |
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11 | |
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12 | import java.util.ArrayList; |
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13 | |
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14 | import vnsim.applications.trafficview.SimulatedCarInfo; |
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15 | import vnsim.core.Engine; |
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16 | import vnsim.map.utils.GPSutil; |
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17 | |
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18 | |
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19 | |
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20 | |
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21 | |
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22 | public class PeanoKey implements Comparable<PeanoKey>, java.io.Serializable { |
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23 | |
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24 | /** <code>serialVersionUID</code> */ |
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25 | private static final long serialVersionUID = -5883719321862303634L; |
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26 | |
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27 | protected byte[] value = new byte[19]; |
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28 | protected int roadIndex; |
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29 | protected int pointIndex; |
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30 | |
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31 | //added to optimize the search of nearby cars |
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32 | protected transient ArrayList<SimulatedCarInfo> cars = null; |
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33 | /** |
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34 | * @param value |
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35 | * @param roadIndex |
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36 | * @param pointIndex |
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37 | */ |
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38 | public PeanoKey(Point p){ |
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39 | int i; |
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40 | byte[] latitude = parseCoord(p.latitude, 9); |
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41 | byte[] longitude = parseCoord(p.longitude, 10); |
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42 | for (i = 0; i < 9; i++) { |
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43 | this.value[2 * i] = longitude[i]; |
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44 | this.value[2 * i + 1] = latitude[i]; |
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45 | } |
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46 | this.value[2 * i] = longitude[i]; |
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47 | |
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48 | } |
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49 | |
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50 | public PeanoKey(Point p, int roadIndex, int pointIndex) { |
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51 | //computes a peano key from a point, the value array is obtained |
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52 | //interleaving the point's latitude and longitude digits |
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53 | //19, 10 (longitude), 9 (latitude) |
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54 | byte[] latitude = parseCoord(p.latitude, 9); |
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55 | byte[] longitude = parseCoord(p.longitude, 10); |
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56 | //System.out.println(new String(longitude)); |
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57 | int i; |
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58 | this.roadIndex = roadIndex; |
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59 | this.pointIndex = pointIndex; |
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60 | for (i = 0; i < 9; i++) { |
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61 | this.value[2 * i] = longitude[i]; |
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62 | this.value[2 * i + 1] = latitude[i]; |
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63 | } |
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64 | this.value[2 * i] = longitude[i]; |
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65 | |
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66 | } |
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67 | |
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68 | public int compareTo(PeanoKey pk) { |
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69 | int i = 0; |
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70 | while (i < value.length && this.value[i] == pk.value[i]) |
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71 | i++; |
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72 | if (i < value.length) |
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73 | return this.value[i] - pk.value[i]; |
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74 | else |
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75 | return 0; |
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76 | } |
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77 | |
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78 | // Used for searching the sorted peano keys vector, for cars in a certain range |
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79 | // See the way the vector is sorted by interleaving digits |
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80 | public void setToUpperCorner(PeanoKey reference) |
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81 | { |
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82 | boolean trig = false; |
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83 | for (int i = 0; i < value.length; i++){ |
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84 | if (trig){ |
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85 | value[i] = 9; |
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86 | }else |
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87 | if (value[i] != reference.value[i]){ |
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88 | trig = true; |
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89 | } |
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90 | } |
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91 | } |
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92 | public void setToLowerCorner(PeanoKey reference) |
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93 | { |
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94 | boolean trig = false; |
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95 | for (int i = 0; i < value.length; i++) |
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96 | { |
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97 | |
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98 | if (trig) |
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99 | { |
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100 | value[i] = -9; |
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101 | } |
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102 | else |
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103 | if (value[i] != reference.value[i]) |
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104 | { |
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105 | trig = true; |
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106 | } |
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107 | } |
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108 | } |
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109 | |
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110 | public String toString() |
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111 | { |
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112 | StringBuffer sb = new StringBuffer(); |
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113 | sb.append("["); |
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114 | sb.append((char)this.value[0]); |
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115 | sb.append((char)this.value[1]); |
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116 | for (int i = 2; i < value.length; i++) |
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117 | sb.append((char)(Math.abs(this.value[i])+'0')); |
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118 | // sb.append(" - "); |
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119 | // sb.append(this.roadIndex); |
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120 | // sb.append(", "); |
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121 | // sb.append(this.pointIndex); |
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122 | sb.append("]"); |
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123 | |
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124 | return sb.toString(); |
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125 | } |
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126 | |
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127 | private byte[] parseCoord(double coord, int digitno) |
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128 | { |
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129 | //digitno can be 10 for longitude or 9 for latitude |
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130 | byte[] result = new byte[digitno]; |
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131 | int coef = 0; |
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132 | if (coord>0){ |
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133 | result[0] = '+'; |
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134 | coef = 1; |
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135 | }else{ |
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136 | result[0] = '-'; |
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137 | coord = - coord; |
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138 | coef = -1; |
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139 | } |
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140 | int c = (int)(coord * 1e6); |
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141 | for (int i=digitno-1; i>0; i--){ |
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142 | result[i] = (byte)((c%10)*coef); |
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143 | c /= 10; |
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144 | } |
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145 | |
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146 | return result; |
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147 | } |
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148 | |
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149 | |
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150 | public int getPointIndex() |
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151 | { |
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152 | return pointIndex; |
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153 | } |
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154 | public void setPointIndex(int pointIndex) |
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155 | { |
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156 | this.pointIndex = pointIndex; |
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157 | } |
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158 | public int getRoadIndex() { |
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159 | return roadIndex; |
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160 | } |
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161 | public void setRoadIndex(int roadIndex) { |
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162 | this.roadIndex = roadIndex; |
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163 | } |
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164 | public byte[] getValue() { |
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165 | return value; |
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166 | } |
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167 | public void setValue(byte[] value) { |
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168 | this.value = value; |
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169 | } |
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170 | |
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171 | |
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172 | PeanoKey maxpk = null; |
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173 | PeanoKey minpk = null; |
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174 | |
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175 | public void addCar(SimulatedCarInfo car) |
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176 | { |
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177 | if (cars == null) |
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178 | { |
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179 | cars = new ArrayList<SimulatedCarInfo>(); |
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180 | } |
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181 | if (maxpk == null || minpk == null) |
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182 | { |
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183 | Road r = Globals.map.roads.get(roadIndex); |
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184 | Point p = r.points.get(pointIndex); |
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185 | maxpk = GPSutil.getMaxSearchBoundPK(p, 2 * Engine.WIRELESS_RANGE); |
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186 | minpk = GPSutil.getMaxSearchBoundPK(p,- 2 * Engine.WIRELESS_RANGE); |
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187 | } |
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188 | cars.add(car); |
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189 | } |
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190 | |
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191 | public void removeCar(SimulatedCarInfo car) |
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192 | { |
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193 | if (cars == null) |
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194 | return; |
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195 | cars.remove(car); |
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196 | if (cars.size() == 0) |
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197 | cars = null; |
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198 | } |
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199 | |
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200 | public ArrayList<SimulatedCarInfo> getCars() { |
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201 | return cars; |
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202 | } |
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203 | |
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204 | public PeanoKey getMaxpk() { |
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205 | return maxpk; |
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206 | } |
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207 | |
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208 | public PeanoKey getMinpk() { |
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209 | return minpk; |
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210 | } |
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211 | |
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212 | public void setMaxpk(PeanoKey maxpk) { |
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213 | this.maxpk = maxpk; |
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214 | } |
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215 | |
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216 | public void setMinpk(PeanoKey minpk) { |
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217 | this.minpk = minpk; |
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218 | } |
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219 | |
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220 | |
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221 | |
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222 | } |
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223 | |
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