Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/math/WKmsOperation.java @ 5818:a4ff4167be1e

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Request feature info on all layers and show it as html if the server does not return valid gml. Non queryable layers produce an error message when the request fails. This is good enough
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 24 Apr 2013 17:33:27 +0200
parents 5642a83420f2
children
rev   line source
925
0cb1a70b8b92 Added the math needed to calculate "W-Differenzen" in "Laengsschnitten"
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.artifacts.math;
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2
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3 import de.intevation.flys.artifacts.model.WKms;
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4 import de.intevation.flys.artifacts.model.WKmsImpl;
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5
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6 import java.util.Arrays;
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7
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8 public abstract class WKmsOperation
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9 {
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10 public static final double EPSILON = 1e-6;
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11
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5642a83420f2 FLYS artifacts: Removed trailing whitespace.
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12 public static final class KmW
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13 implements Comparable<KmW>
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14 {
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15 protected double km;
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16 protected double w;
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17
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18 public KmW(double km, double w) {
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19 this.km = km;
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20 this.w = w;
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21 }
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22
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23 public int compareTo(KmW other) {
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24 return km < other.km
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25 ? -1
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26 : km > other.km ? +1 : 0;
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27 }
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28
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29 public boolean kmEquals(KmW other) {
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30 return Math.abs(km - other.km) < EPSILON;
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31 }
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32
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33 public double subtract(KmW other) {
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34 return w - other.w;
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35 }
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36 } // class KmW
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37
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38 public static final WKmsOperation SUBTRACTION = new WKmsOperation() {
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39
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40 @Override
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41 public WKms operate(WKms a, WKms b) {
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42 return subtract(a, b);
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43 }
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44 };
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45
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46 protected WKmsOperation() {
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47 }
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48
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49 public abstract WKms operate(WKms a, WKms b);
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50
1148
302461d5d071 Cosmetics.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
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51 /**
302461d5d071 Cosmetics.
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52 * Subtract two series from each other, interpolate values
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53 * missing in one series in the other.
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54 */
925
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55 public static WKms subtract(WKms minuend, WKms subtrahend) {
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56
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57 int M = minuend .size();
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58 int S = subtrahend.size();
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59
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60 // Don't subtract empty sets
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61 if (M < 1 || S < 1) {
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62 return new WKmsImpl();
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63 }
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64
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65 KmW [] ms = new KmW[M];
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66 KmW [] ss = new KmW[S];
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67
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68 for (int i = 0; i < M; ++i) {
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69 ms[i] = new KmW(minuend.getKm(i), minuend.getW(i));
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70 }
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71
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72 for (int i = 0; i < S; ++i) {
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73 ss[i] = new KmW(subtrahend.getKm(i), subtrahend.getW(i));
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74 }
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75
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76 Arrays.sort(ms);
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77 Arrays.sort(ss);
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78
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79 // no overlap -> empty result set
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80 if (ms[0].km > ss[S-1].km || ss[0].km > ms[M-1].km) {
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81 return new WKmsImpl();
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82 }
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83
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84 WKmsImpl result = new WKmsImpl();
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85
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86 int mi = 0;
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87 int si = 0;
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88
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89 OUT: while (mi < M && si < S) {
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90 KmW m = ms[mi];
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91 KmW s = ss[si];
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92
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93 if (m.km + EPSILON < s.km) {
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94 // minuend is before subtrahend
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95
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96 while (ms[mi].km + EPSILON < s.km) {
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97 if (++mi >= M) {
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98 break OUT;
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99 }
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100 }
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101
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102 if (ms[mi].km + EPSILON > s.km) {
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103 double mw = Linear.linear(
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104 s.km,
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105 ms[mi-1].km, ms[mi].km,
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106 ms[mi-1].w, ms[mi].w);
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107 result.add(s.km, mw - s.w);
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108 ++si;
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109 }
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110 else { // s.km == ms[mi].km
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111 result.add(s.km, ms[mi].subtract(s));
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112 ++mi;
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113 ++si;
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114 }
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115 }
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116 else if (m.km > s.km + EPSILON) {
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117 // subtrahend is before minuend
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118
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119 while (m.km > ss[si].km + EPSILON) {
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120 if (++si >= S) {
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121 break OUT;
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122 }
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123 }
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124
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125 if (ss[si].km + EPSILON > m.km) {
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126 double sw = Linear.linear(
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127 m.km,
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128 ss[si-1].km, ss[si].km,
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129 ss[si-1].w, ss[si].w);
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130 result.add(m.km, m.w - sw);
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131 }
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132 else { // ss[si].km == m.km
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133 result.add(m.km, m.subtract(ss[si]));
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parents:
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134 ++mi;
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parents:
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135 ++si;
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parents:
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136 }
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parents:
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137 }
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parents:
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138 else { // m.km == s.km
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parents:
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139 result.add(s.km, m.subtract(s));
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parents:
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140 ++mi;
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parents:
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141 ++si;
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parents:
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142 }
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parents:
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143 }
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parents:
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144
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parents:
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145 return result;
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parents:
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146 }
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parents:
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147 }
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parents:
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148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org