Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/fixings/FixATWriter.java @ 3579:accb64be866c

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Add annotations to fixA longitudinal Sections. flys-artifacts/trunk@5195 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Mon, 13 Aug 2012 09:41:21 +0000
parents 0c8a6145098b
children 1dc904370a64
rev   line source
3220
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1 package de.intevation.flys.exports.fixings;
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2
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3 import de.intevation.artifacts.CallMeta;
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4
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5 import de.intevation.flys.artifacts.math.fitting.Function;
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6
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7 import de.intevation.flys.artifacts.model.Parameters;
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8
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9 import de.intevation.flys.artifacts.resources.Resources;
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10
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11 import de.intevation.flys.exports.ATWriter;
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12
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13 import java.io.IOException;
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14 import java.io.PrintWriter;
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15 import java.io.Writer;
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16
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17 import java.util.ArrayDeque;
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18 import java.util.Collection;
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19 import java.util.Locale;
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20
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21 import org.apache.log4j.Logger;
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22
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23 public class FixATWriter
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24 {
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25 private static Logger log = Logger.getLogger(FixATWriter.class);
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26
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27 public static final String I18N_HEADER_KEY =
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28 "fix.export.at.header";
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29
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30 public static final String I18N_HEADER_DEFAULT =
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31 "Exported fixings discharge curve for {0} {0}-km: {1}";
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32
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33 public static final String [] Q_MAX_COLUMN = new String [] { "max_q" };
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34
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35 public static class WQ {
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36
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37 protected double w;
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38 protected double q;
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39
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40 public WQ() {
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41 }
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42
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43 public WQ(double w, double q) {
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44 this.w = w;
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45 this.q = q;
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46 }
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47 } // class WQ
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48
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49 protected Function function;
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50 protected Parameters parameters;
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51
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52 public FixATWriter() {
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53 }
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54
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55 public FixATWriter(Function function, Parameters parameters) {
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56 this.function = function;
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57 this.parameters = parameters;
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58 }
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59
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60 public void write(
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61 Writer writer,
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62 CallMeta meta,
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63 String river,
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64 double km
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65 )
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66 throws IOException {
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67 PrintWriter out = new PrintWriter(writer);
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68 printHeader(out, meta, river, km);
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69
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70 double [] coeffs = parameters.interpolate(
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71 "km", km, function.getParameterNames());
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72
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73 double [] qMax = parameters.interpolate(
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74 "km", km, Q_MAX_COLUMN);
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75
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76 if (coeffs == null || qMax == null) {
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77 log.debug("No data found at km " + km + ".");
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78 return;
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79 }
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80
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81 de.intevation.flys.artifacts.math.Function funcInst =
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82 function.instantiate(coeffs);
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83
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84 double wMax = funcInst.value(qMax[0]);
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85
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86 if (Double.isNaN(wMax) || wMax < 0d) {
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87 log.debug("function '" + function.getName() +
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88 "' eval failed at " + wMax);
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89 return;
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90 }
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91
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92 Function inverse = function.getInverse();
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93
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94 de.intevation.flys.artifacts.math.Function invInst =
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95 inverse.instantiate(coeffs);
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96
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97 /* TODO: Do some fancy root finding stuff with the
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98 * first derivative of the inverse function to find
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99 * the minimum of function and directly export
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100 * the longest strict monotonous ascending run of
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101 * ws of the inverse in range [0, wMax].
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102 *
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103 * To simplify the situation we iterate in steps
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104 * of 10cm over the range and export the longest
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105 * run.
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106 */
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107
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108 ArrayDeque<WQ> longest = new ArrayDeque<WQ>();
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109 ArrayDeque<WQ> current = new ArrayDeque<WQ>();
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110
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111 for (double w = 0d; w <= wMax; w += 0.1d) {
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112 double q = invInst.value(w);
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113
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114 if (Double.isNaN(q)) {
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115 log.debug("Eval of inverse for " + w + " failed.");
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116 continue;
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117 }
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118
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119 WQ wq = new WQ(w, q);
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120
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121 if (current.isEmpty() || current.getLast().q < q) {
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122 current.add(wq);
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123 }
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124 else {
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125 if (current.size() >= longest.size()) {
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126 longest = current;
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127 }
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128 current = new ArrayDeque<WQ>();
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129 current.add(wq);
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130 }
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131 }
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132
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133 if (current.size() >= longest.size()) {
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134 longest = current;
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135 }
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136
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137 printWQs(out, longest);
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138 out.flush();
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139 }
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140
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141 protected void printWQs(PrintWriter out, Collection<WQ> wqs) {
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142 int lastColumn = 10;
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143 for (WQ wq: wqs) {
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144 int column = (int)(wq.w * 10d) % 10;
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145
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146 if (lastColumn > column) {
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147 for (; lastColumn < 10; ++lastColumn) {
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148 out.print(ATWriter.EMPTY);
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149 }
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150 out.println();
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151 out.printf(Locale.US, "%8d", (int)Math.round(wq.w*100.0));
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152 lastColumn = 0;
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153 }
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154 for (;lastColumn < column-1; ++lastColumn) {
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155 out.print(ATWriter.EMPTY);
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156 }
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157 ATWriter.printQ(out, wq.q);
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158
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159 lastColumn = column;
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160 }
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161 out.println();
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162 }
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163
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164 protected void printHeader(
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165 PrintWriter out,
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166 CallMeta meta,
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167 String river,
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168 double km
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169 ) {
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170 out.println(Resources.format(
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171 meta,
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172 I18N_HEADER_KEY,
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173 I18N_HEADER_DEFAULT,
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174 river, km));
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175 }
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176 }
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177 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org