Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonSeries.java @ 1055:bb2679624c6a

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Implemented a new histogram dataset that takes the width of a single bin as well as the number of bins for the histogram (issue288). gnv-artifacts/trunk@1130 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 27 May 2010 07:41:14 +0000
parents 22c18083225e
children f953c9a559d8
rev   line source
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1 package de.intevation.gnv.jfreechart;
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2
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3 import java.util.HashMap;
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4 import java.util.Map;
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5
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6 import org.jfree.data.Range;
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7
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8 import org.jfree.data.general.Series;
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9
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10 /**
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11 * This class represents a series of polygon items.
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12 *
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13 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha Teichmann</a>
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14 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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15 */
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16 public class PolygonSeries
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17 extends Series
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18 {
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19 /**
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20 * Polygons.
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21 */
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22 protected CompactXYItems [] rings;
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23
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24 /**
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25 * A map containing attribues.
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26 */
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27 protected Map attributes;
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28
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29 /**
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30 * The unique key of this series.
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31 */
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32 private static long uniqueKey;
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33
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34 /**
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35 *
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36 * @return a unique key.
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37 */
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38 protected synchronized static Long createUniqueKey() {
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39 return new Long(uniqueKey++);
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40 }
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41
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42 /**
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43 * Constructor to create an empty PolygonSeries with a unique key.
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44 */
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45 public PolygonSeries() {
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46 this(createUniqueKey(), null);
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47 }
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49 /**
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50 *
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51 * @param key The key used for this series.
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52 * @param rings Polygons.
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53 */
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54 public PolygonSeries(Comparable key, CompactXYItems [] rings) {
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55 this(key, null, rings, new HashMap());
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56 }
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57
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58 /**
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59 *
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60 * @param key The key used for this series.
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61 * @param description A description of this series.
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62 * @param rings Polygons.
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63 */
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64 public PolygonSeries(
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65 Comparable key,
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66 String description,
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67 CompactXYItems[] rings
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68 ) {
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69 this(key, description, rings, new HashMap());
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70 }
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71
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72 /**
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73 *
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74 * @param key The key used for this series.
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75 * @param description A description of this series.
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76 * @param rings Polygons.
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77 * @param attributes Some attribues.
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78 */
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79 public PolygonSeries(
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80 Comparable key,
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81 String description,
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82 CompactXYItems [] rings,
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83 Map attributes
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84 ) {
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85 super(key, description);
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86 this.rings = rings;
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87 this.attributes = attributes;
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88 }
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89
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90
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91 public void setRings(CompactXYItems [] rings) {
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92 this.rings = rings;
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93 }
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94
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95
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96 public CompactXYItems [] getRings() {
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97 return rings;
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98 }
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99
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100
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101 public void addRing(CompactXYItems newRing) {
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102 if (rings == null) {
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103 rings = new CompactXYItems [] { newRing };
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104 }
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105 else {
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106 CompactXYItems [] nRings = new CompactXYItems[rings.length + 1];
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107 System.arraycopy(rings, 0, nRings, 0, rings.length);
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108 nRings[rings.length] = newRing;
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109 rings = nRings;
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110 }
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111 }
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112
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113
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114 public void addRings(CompactXYItems [] newRings) {
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115 if (newRings == null || newRings.length == 0) {
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116 return;
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117 }
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118 if (rings == null || rings.length == 0) {
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119 rings = newRings;
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120 }
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121 else {
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122 CompactXYItems [] both =
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123 new CompactXYItems[rings.length + newRings.length];
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124 System.arraycopy(rings, 0, both, 0, rings.length);
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125 System.arraycopy(newRings, 0, both, rings.length, newRings.length);
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126 rings = both;
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127 }
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128 }
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129
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130
422
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131 public Object getAttribute(Object key) {
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132 return attributes.get(key);
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133 }
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134
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135
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136 public Object setAttribute(Object key, Object value) {
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137 return attributes.put(key, value);
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138 }
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139
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140
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141 public int getItemCount() {
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142 return rings != null ? rings.length : 0;
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143 }
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144
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145
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146 public CompactXYItems getItem(int idx) {
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147 return rings[idx];
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148 }
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149
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150
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151 public Object removeAttribute(Object key) {
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152 return attributes.remove(key);
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153 }
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154
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155
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156 public boolean hasAttribute(Object key) {
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157 return attributes.containsKey(key);
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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 * @return the range of the x axis.
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164 */
422
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165 public Range getDomainBounds() {
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166 double upper = Double.NEGATIVE_INFINITY;
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167 double lower = Double.POSITIVE_INFINITY;
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168 int count = getItemCount();
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169
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170 for (int i = 0; i < count; i++) {
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171 CompactXYItems items = getItem(i);
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172 double minX = items.getMinX();
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173 double maxX = items.getMaxX();
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174
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175 if (!Double.isNaN(minX)) {
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176 lower = Math.min(lower, minX);
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177 }
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178
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179 if (!Double.isNaN(maxX)) {
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180 upper = Math.max(upper, maxX);
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181 }
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182 }
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183
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184 if (lower > upper) {
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185 return null;
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186 }
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187
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188 return new Range(lower, upper);
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189 }
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190
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191
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192 /**
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193 *
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194 * @return the range of the y axis.
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195 */
422
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196 public Range getRangeBounds() {
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197 double upper = Double.NEGATIVE_INFINITY;
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198 double lower = Double.POSITIVE_INFINITY;
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199 int count = getItemCount();
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200
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201 for (int i = 0; i < count; i++) {
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202 CompactXYItems items = getItem(i);
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203 double minY = items.getMinY();
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204 double maxY = items.getMaxY();
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205
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206 if (!Double.isNaN(minY)) {
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207 lower = Math.min(lower, minY);
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208 }
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209
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210 if (!Double.isNaN(maxY)) {
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211 upper = Math.max(upper, maxY);
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212 }
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213 }
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214
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215 if (lower > upper) {
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216 return null;
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217 }
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218
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219 return new Range(lower, upper);
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220 }
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221 }
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222 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org