Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/IsoProducer.java @ 605:e8ebdbc7f1e3

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First step of removing the cache blob. The static part of the describe document will be created by using the input data stored at each state. Some TODOs left (see ChangeLog). gnv-artifacts/trunk@671 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 09 Feb 2010 14:27:55 +0000
parents f7038820df2e
children 9a828e5a2390
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 java.util.List;
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4 import java.util.ArrayList;
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5 import java.util.HashMap;
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6 import java.util.HashSet;
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7
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8 import gnu.trove.TIntObjectHashMap;
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9 import gnu.trove.TIntHashSet;
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10 import gnu.trove.TObjectProcedure;
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11
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12 import de.intevation.gnv.math.IJKey;
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13
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14 import de.intevation.gnv.raster.Vectorizer.Edge;
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15
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16 /**
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17 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de)
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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