Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoProducer.java @ 800:db5b04ecb426

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ISSUE215: Improved ODV-Export. now all Columns which have identical values but different Parameters will be merged to one row. gnv-artifacts/trunk@882 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 06 Apr 2010 13:07:11 +0000
parents c4156275c1e1
children d766fe2d917a
rev   line source
465
f7038820df2e Added support to trace rasters to JTS multi polygons and multi line strings.
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diff changeset
1 package de.intevation.gnv.raster;
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2
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3 import de.intevation.gnv.math.IJKey;
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4
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5 import de.intevation.gnv.raster.Vectorizer.Edge;
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6
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7 import gnu.trove.TIntHashSet;
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8 import gnu.trove.TIntObjectHashMap;
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9 import gnu.trove.TObjectProcedure;
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10
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11 import java.util.ArrayList;
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12 import java.util.HashMap;
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13 import java.util.HashSet;
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14 import java.util.List;
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15
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16 /**
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17 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a>
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18 */
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19 public class IsoProducer
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20 extends AbstractProducer
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21 {
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22 public interface AttributeGenerator {
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23
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24 Object generateAttribute(int neighbor1, int neighbor2);
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25
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26 } // interface AttributeGenerator
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27
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28 protected HashMap<Edge, Integer> open;
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29 protected HashMap<IJKey, TIntObjectHashMap> commonOpen;
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30 protected HashMap<IJKey, ArrayList<Edge>> complete;
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31
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32 protected int width;
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33 protected int height;
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34
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35 public IsoProducer(
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36 double minX, double minY,
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37 double maxX, double maxY
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38 ) {
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39 super(minX, minY, maxX, maxY);
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40
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41 open = new HashMap<Edge, Integer>();
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42 commonOpen = new HashMap<IJKey, TIntObjectHashMap>();
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43 complete = new HashMap<IJKey, ArrayList<Edge>>();
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44 }
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45
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46 public void handleRings(
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47 List<Edge> rings,
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48 int value,
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49 int width,
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50 int height
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51 ) {
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52 if (value == -1) {
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53 return;
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54 }
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55 this.width = width;
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56 this.height = height;
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57
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58 Integer v = Integer.valueOf(value);
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59
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60 for (Edge head: rings) {
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61 Edge current = head;
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62 do {
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63 Integer neighbor = open.remove(current);
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64
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65 if (neighbor != null) {
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66 IJKey pair = new IJKey(value, neighbor.intValue());
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67 pair.sort();
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68
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69 TIntObjectHashMap co = commonOpen.get(pair);
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70
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71 if (co == null) {
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72 commonOpen.put(pair, co = new TIntObjectHashMap());
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73 }
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74
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75 Edge edge = new Edge(current);
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76
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77 Edge otherA = (Edge)co.remove(edge.a);
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78 if (otherA != null) {
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79 otherA.chain(edge, edge.a);
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80 }
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81
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82 Edge otherB = (Edge)co.remove(edge.b);
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83 if (otherB != null) {
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84 otherB.chain(edge, edge.b);
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85 }
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86
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87 if (edge.isComplete()) {
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88 ArrayList list = complete.get(pair);
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89 if (list == null) {
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90 complete.put(pair, list = new ArrayList());
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91 }
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92 list.add(Vectorizer.simplify(edge, width));
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93 }
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94 else {
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95 if (otherA == null) {
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96 co.put(edge.a, edge);
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97 }
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98 if (otherB == null) {
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99 co.put(edge.b, edge);
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100 }
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101 }
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102 }
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103 else {
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104 Edge edge = new Edge(current.b, current.a);
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105 open.put(edge, v);
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106 }
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107
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108 current = current.next;
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109 }
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110 while (current != head);
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111 } // for all rings
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112
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113 } // handleRings
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114
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115 protected HashSet<IJKey> joinPairs() {
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116 HashSet<IJKey> pairs = new HashSet<IJKey>();
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117 pairs.addAll(complete .keySet());
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118 pairs.addAll(commonOpen.keySet());
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119 return pairs;
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120 }
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121
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122 protected static ArrayList<Edge> headList(TIntObjectHashMap map) {
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123 final ArrayList<Edge> headList = new ArrayList<Edge>();
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124 map.forEachValue(new TObjectProcedure() {
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125 TIntHashSet headSet = new TIntHashSet();
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126 public boolean execute(Object value) {
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127 Edge head = ((Edge)value).head();
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128 if (headSet.add(head.a)) {
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129 headList.add(head);
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130 }
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131 return true;
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132 }
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133 });
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134 return headList;
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135 }
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136
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137 public void clear() {
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138 open.clear();
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139 complete.clear();
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140 commonOpen.clear();
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141 }
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142 }
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143 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org