Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/Palette.java @ 469:62fc63d0f71d

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Added a new State in Product Verticalprofile in Timeseriespoints. Now it will be displayed the Years where measurements happened and than only the dates of the chosen Year will be fetched and displayed. gnv-artifacts/trunk@532 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 12 Jan 2010 12:42:53 +0000
parents c7ca2fce041f
children c8089cd7d777
rev   line source
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1 package de.intevation.gnv.raster;
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2
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3 import org.w3c.dom.Document;
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4 import org.w3c.dom.Element;
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5 import org.w3c.dom.NodeList;
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6
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7 import java.util.Arrays;
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8
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9 import java.awt.Color;
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10
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11 import org.apache.log4j.Logger;
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12
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13 import de.intevation.gnv.raster.Raster.ValueToIndex;
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14
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15 /**
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16 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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17 */
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18 public class Palette
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19 implements ValueToIndex
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20 {
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21 private static Logger log = Logger.getLogger(Palette.class);
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22
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23 public static final class Entry
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24 implements Comparable
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25 {
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26 private Entry left;
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27 private Entry right;
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28
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29 private int index;
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30
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31 private double from;
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32 private double to;
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33
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34 private String description;
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35
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36 private Color color;
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37
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38 public Entry() {
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39 }
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40
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41 public Entry(Entry other) {
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42 index = other.index;
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43 from = other.from;
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44 to = other.to;
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45 description = other.description;
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46 color = other.color;
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47 }
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48
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49 public Entry(
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50 int index,
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51 double from,
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52 double to,
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53 Color color,
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54 String description
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55 ) {
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56 this.index = index;
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57 this.from = from;
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58 this.to = to;
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59 this.color = color;
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60 this.description = description;
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61 }
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62
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63 public int compareTo(Object other) {
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64 Entry e = (Entry)other;
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65 if (from < e.from) return -1;
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66 if (from > e.from) return +1;
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67 return 0;
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68 }
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69
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70 public double getFrom() {
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71 return from;
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72 }
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73
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74 public double getTo() {
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75 return to;
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76 }
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77
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78 public Color getColor() {
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79 return color;
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80 }
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81
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82 public Entry locateEntry(double value) {
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83 Entry current = this;
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84 while (current != null) {
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85 boolean b = value >= current.from;
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86 if (b && value <= current.to) {
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87 return current;
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88 }
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89 current = b
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90 ? current.right
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91 : current.left;
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92 }
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93 return null;
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94 }
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95
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96 public int locate(double value) {
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97 Entry entry = locateEntry(value);
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98 return entry != null
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99 ? entry.index
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100 : -1;
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101 }
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102
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103 public Entry findByIndex(int index) {
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104 Entry current = this;
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105 while (current != null) {
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106 if (current.index == index) {
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107 break;
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108 }
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109 current = index < current.index
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110 ? current.left
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111 : current.right;
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112 }
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113 return current;
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114 }
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115
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116 public String getDescription() {
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117 return description;
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118 }
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119
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120 public boolean isInfinity() {
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121 return from == -Double.MAX_VALUE
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122 || to == Double.MAX_VALUE;
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123 }
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124 } // class Entry
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125
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126 protected Entry [] entries;
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127 protected Entry lookup;
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128 protected Color [] rgbs;
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129
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130 private Entry buildLookup(Entry [] entries, int lo, int hi) {
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131 if (lo > hi) {
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132 return null;
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133 }
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134 int mid = (lo + hi)/2;
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135 Entry entry = entries[mid];
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136 entry.left = buildLookup(entries, lo, mid-1);
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137 entry.right = buildLookup(entries, mid+1, hi);
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138 return entry;
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139 }
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140
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141 public Palette() {
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142 }
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143
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144 public Palette(Document document) {
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145
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146 NodeList rangeNodes = document.getElementsByTagName("range");
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147
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148 entries = new Entry[rangeNodes.getLength()];
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149 rgbs = new Color[entries.length];
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150
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151 for (int i = 0; i < entries.length; ++i) {
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152 Element rangeElement = (Element)rangeNodes.item(i);
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153 double from = doubleValue(rangeElement.getAttribute("from"));
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154 double to = doubleValue(rangeElement.getAttribute("to"));
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155 Color color = color(rangeElement.getAttribute("rgb"));
426
3a0c0ad113d9 Load palettes from configuration.
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156 String desc = rangeElement.getAttribute("description");
424
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157 if (from > to) { double t = from; from = to; to = t; }
426
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158 entries[i] = new Entry(i, from, to, color, desc);
424
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159 rgbs[i] = color;
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160 }
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161
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162 buildLookup();
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163 }
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164
435
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165 public Palette(Palette original, int N) {
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166 if (N < 2) {
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167 throw new IllegalArgumentException("N < 2");
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168 }
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169
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170 Entry [] origEntries = original.entries;
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171
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172 int newSize = 0;
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173 for (int i = 0; i < origEntries.length; ++i) {
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174 // cannot split infinity intervals
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175 newSize += origEntries[i].isInfinity() ? 1 : N;
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176 }
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177
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178 entries = new Entry[newSize];
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179 rgbs = new Color[newSize];
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180
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181 for (int i = 0, j = 0; i < origEntries.length; ++i) {
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182 Entry origEntry = origEntries[i];
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183 if (origEntry.isInfinity()) {
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184 // infinity intervals are just copied
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185 Entry nEntry = new Entry(origEntry);
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186 entries[j] = nEntry;
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187 rgbs[j] = nEntry.color;
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188 nEntry.index = j++;
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189 }
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190 else {
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191 // split interval into N parts
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192 double from = origEntry.from;
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193 double to = origEntry.to;
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194 double delta = (to - from)/N;
447
92b7ccbf6163 Improved generation of iso lines in vertical cross section.
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diff changeset
195 for (int k = 0; k < N; ++k) {
435
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diff changeset
196 Entry nEntry = new Entry(origEntry);
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diff changeset
197 nEntry.from = from;
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diff changeset
198 nEntry.to = from + delta;
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diff changeset
199 from += delta;
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diff changeset
200 entries[j] = nEntry;
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diff changeset
201 rgbs[j] = nEntry.color;
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diff changeset
202 nEntry.index = j++;
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203 }
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204 } // limited interval
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205 } // for all original entries
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206
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207 buildLookup();
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208 }
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209
424
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210 private static final double doubleValue(String s) {
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211 if (s == null || (s = s.trim()).length() == 0) {
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diff changeset
212 return 0d;
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213 }
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diff changeset
214 if ((s = s.toLowerCase()).startsWith("-inf")) {
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diff changeset
215 return -Double.MAX_VALUE; // XXX: Not using Double.NEGATIVE_INFINITY!
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216 }
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217
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diff changeset
218 if (s.startsWith("inf")) {
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diff changeset
219 return Double.MAX_VALUE; // XXX: Not using Double.NEGATIVE_INFINITY!
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220 }
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221
21fbd254db71 Added support for converting 2D rasters into polygons.
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222 return Double.parseDouble(s);
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diff changeset
223 }
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224
21fbd254db71 Added support for converting 2D rasters into polygons.
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225 private static final Color color(String s) {
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226 if (s == null || (s = s.trim()).length() == 0) {
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227 return null;
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diff changeset
228 }
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diff changeset
229 return Color.decode(s);
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diff changeset
230 }
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diff changeset
231
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232
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233 protected void buildLookup() {
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diff changeset
234 Arrays.sort(entries);
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diff changeset
235 lookup = buildLookup(entries, 0, entries.length-1);
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236 }
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237
435
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diff changeset
238 public Palette subdivide(int N) {
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diff changeset
239 return new Palette(this, N);
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diff changeset
240 }
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diff changeset
241
424
21fbd254db71 Added support for converting 2D rasters into polygons.
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242 public int getSize() {
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diff changeset
243 return rgbs.length;
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parents:
diff changeset
244 }
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245
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246 public Color getColor(int index) {
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247 return rgbs[index];
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parents:
diff changeset
248 }
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249
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diff changeset
250 public int indexToRGB(int index) {
21fbd254db71 Added support for converting 2D rasters into polygons.
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parents:
diff changeset
251 return rgbs[index].getRGB();
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diff changeset
252 }
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253
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diff changeset
254 public int toIndex(double value) {
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parents:
diff changeset
255 return lookup.locate(value);
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parents:
diff changeset
256 }
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257
21fbd254db71 Added support for converting 2D rasters into polygons.
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diff changeset
258 public Entry getEntry(double value) {
21fbd254db71 Added support for converting 2D rasters into polygons.
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parents:
diff changeset
259 return lookup.locateEntry(value);
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parents:
diff changeset
260 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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261
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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262 public Entry getEntryByIndex(int index) {
21fbd254db71 Added support for converting 2D rasters into polygons.
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263 return lookup.findByIndex(index);
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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264 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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265 }
21fbd254db71 Added support for converting 2D rasters into polygons.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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266 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org