Mercurial > dive4elements > river

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