Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ATWriter.java @ 4968:d76705b68e73

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FixRealizingCalculation: TODO/issue comment.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 06 Feb 2013 09:57:27 +0100
parents 7669747d22f2
children a929d9a9fa1e
rev   line source
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1 package de.intevation.flys.exports;
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2
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3 import java.io.IOException;
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4 import java.io.Writer;
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5 import java.io.PrintWriter;
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6 import java.math.BigDecimal;
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7
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8 import java.text.DateFormat;
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9 import java.util.Date;
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10 import java.util.Locale;
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11
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12 import de.intevation.artifacts.CallMeta;
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13
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14 import de.intevation.flys.artifacts.model.WQ;
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15 import de.intevation.flys.artifacts.resources.Resources;
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17 import org.apache.commons.math.analysis.UnivariateRealFunction;
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19 import org.apache.commons.math.analysis.interpolation.SplineInterpolator;
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20 import org.apache.commons.math.analysis.interpolation.LinearInterpolator;
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22 import org.apache.commons.math.analysis.polynomials.PolynomialFunction;
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23
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24 import org.apache.commons.math.FunctionEvaluationException;
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25
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26 import org.apache.log4j.Logger;
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27
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28 public class ATWriter
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29 {
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30 private static Logger logger = Logger.getLogger(ATWriter.class);
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31
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32 public static final int COLUMNS = 10;
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33
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34 public static final String I18N_AT_HEADER =
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35 "export.discharge.curve.at.header";
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36
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37 public static final String I18N_AT_GAUGE_HEADER =
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38 "export.discharge.curve.at.gauge.header";
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39
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40 public static final String EMPTY = " ";
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41
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42 protected double minW;
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43 protected double maxW;
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44 protected double minQ;
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45 protected double maxQ;
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46
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47 protected UnivariateRealFunction qFunc;
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48
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49 public ATWriter() {
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50 }
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51
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52 public ATWriter(WQ wq) throws IllegalArgumentException {
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53
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54 int [] bounds = wq.longestIncreasingWRangeIndices();
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55
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56 if (logger.isDebugEnabled()) {
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57 logger.debug("exporting w between indices " +
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58 bounds[0] + " and " + bounds[1] + " (" +
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59 wq.getW(bounds[0]) + ", " + wq.getW(bounds[1]));
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60 }
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61
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62 if (bounds[1]-bounds[0] < 1) { // Only first w can be written out.
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63 minW = maxW = wq.getW(bounds[0]);
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64 minQ = maxQ = wq.getQ(bounds[0]);
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65 // constant function
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66 qFunc = new PolynomialFunction(new double [] { minQ });
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67 return;
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68 }
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69
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70 double [] ws = new double[bounds[1]-bounds[0]];
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71 double [] qs = new double[ws.length];
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72
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73 for (int i = 0; i < ws.length; ++i) {
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74 int idx = bounds[0]+i;
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75 ws[i] = wq.getW(idx);
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76 qs[i] = wq.getQ(idx);
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77 }
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78
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79 qFunc = ws.length < 3
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80 ? new LinearInterpolator().interpolate(ws, qs)
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81 : new SplineInterpolator().interpolate(ws, qs);
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82
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83 minW = wq.getW(bounds[0]);
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84 maxW = wq.getW(bounds[1]);
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85 minQ = wq.getQ(bounds[0]);
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86 maxQ = wq.getQ(bounds[1]);
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87 }
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88
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89 public double getQ(double w) {
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90
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91 try {
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92 return qFunc.value(w);
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93 }
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94 catch (FunctionEvaluationException aode) {
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95 // should not happen
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96 logger.warn("spline interpolation failed", aode);
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97 return w <= minW ? minQ : maxQ;
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98 }
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99 }
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100
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101 public static void printQ(PrintWriter out, double q) {
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102 String format;
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103 if (q < 1d) format = " % 8.3f";
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104 else if (q < 10d) format = " % 8.2f";
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105 else if (q < 100d) format = " % 8.1f";
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106 else {
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107 format = " % 8.0f";
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108 if (q > 1000d) q = Math.rint(q/10d)*10d;
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109 }
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110 out.printf(Locale.US, format, q);
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111 }
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112
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113
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114 protected static void printGaugeHeader(
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115 PrintWriter out,
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116 CallMeta callMeta,
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117 String river,
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118 double km,
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119 String gName,
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120 BigDecimal datum,
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121 Date date
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122 ) {
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123 DateFormat f = DateFormat.getDateInstance();
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124 out.print(Resources.getMsg(
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125 callMeta,
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126 I18N_AT_GAUGE_HEADER,
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127 I18N_AT_GAUGE_HEADER,
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128 new Object[] { river, gName, f.format(date), datum } ));
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129 out.print("\r\n");
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130 }
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131
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132 protected static void printHeader(
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133 PrintWriter out,
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134 CallMeta callMeta,
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135 String river,
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136 double km
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137 ) {
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138 out.print(Resources.getMsg(
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139 callMeta,
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140 I18N_AT_HEADER,
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141 I18N_AT_HEADER,
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142 new Object[] { river, km } ));
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143 out.print("\r\n");
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144 }
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145
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146 public void write(
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147 Writer writer,
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148 CallMeta meta,
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149 String river,
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150 double km,
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151 String gName,
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152 BigDecimal datum,
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153 Date date,
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154 double scale)
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155 throws IOException
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156 {
729
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157 PrintWriter out = new PrintWriter(writer);
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158
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159 // a header is required, because the desktop version of FLYS will skip
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160 // the first row.
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161 if (gName != null) {
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162 printGaugeHeader(out, meta, river, km, gName, datum, date);
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163 }
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164 else {
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165 printHeader(out, meta, river, km);
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166 }
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167
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168 double rest = (minW * 100.0) % 10.0;
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169
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170 double startW = Math.rint((minW - rest*0.01)*10.0)*0.1;
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171
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172 if (logger.isDebugEnabled()) {
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173 logger.debug("startW: " + startW);
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174 logger.debug("rest: " + rest);
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175 }
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176
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177 int col = 0;
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178 for (double w = startW; w <= maxW; w += 0.01) {
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179 if (col == 0) {
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180 out.printf(Locale.US, "%8d", (int)Math.round(w * scale));
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181 }
729
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182
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183 if (w < minW) {
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184 out.print(EMPTY);
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185 }
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186 else {
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187 printQ(out, getQ(w));
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188 }
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189
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190 if (++col >= COLUMNS) {
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191 out.print("\r\n");
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192 col = 0;
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193 }
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194 }
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195
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196 if (col > 0) {
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197 out.print("\r\n");
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198 }
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199
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200 out.flush();
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201 }
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202 }
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203 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org