Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/ATWriter.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children af13ceeba52a
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.exports;
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10
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11 import java.io.IOException;
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12 import java.io.Writer;
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13 import java.io.PrintWriter;
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14 import java.math.BigDecimal;
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15
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16 import java.text.DateFormat;
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17 import java.util.Date;
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18 import java.util.Locale;
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19
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20 import org.dive4elements.artifacts.CallMeta;
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21
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22 import org.dive4elements.river.artifacts.model.WQ;
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23 import org.dive4elements.river.artifacts.resources.Resources;
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24
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25 import org.apache.commons.math.analysis.UnivariateRealFunction;
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27 import org.apache.commons.math.analysis.interpolation.SplineInterpolator;
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28 import org.apache.commons.math.analysis.interpolation.LinearInterpolator;
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29
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30 import org.apache.commons.math.analysis.polynomials.PolynomialFunction;
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31
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32 import org.apache.commons.math.FunctionEvaluationException;
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33
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34 import org.apache.log4j.Logger;
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35
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36 /** Write AT files. */
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37 public class ATWriter
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38 {
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39 private static Logger logger = Logger.getLogger(ATWriter.class);
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40
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41 public static final int COLUMNS = 10;
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42
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43 public static final String I18N_AT_HEADER =
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44 "export.discharge.curve.at.header";
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45
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46 public static final String I18N_AT_GAUGE_HEADER =
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47 "export.discharge.curve.at.gauge.header";
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48
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49 public static final String EMPTY = " ";
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50
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51 protected double minW;
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52 protected double maxW;
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53 protected double minQ;
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54 protected double maxQ;
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55
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56 protected UnivariateRealFunction qFunc;
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57
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58 public ATWriter() {
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59 }
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60
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61 public ATWriter(WQ wq) throws IllegalArgumentException {
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62
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63 int [] bounds = wq.longestIncreasingWRangeIndices();
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64
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65 if (logger.isDebugEnabled()) {
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66 logger.debug("exporting w between indices " +
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67 bounds[0] + " and " + bounds[1] + " (" +
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68 wq.getW(bounds[0]) + ", " + wq.getW(bounds[1]));
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69 }
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70
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71 if (bounds[1]-bounds[0] < 1) { // Only first w can be written out.
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72 minW = maxW = wq.getW(bounds[0]);
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73 minQ = maxQ = wq.getQ(bounds[0]);
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74 // constant function
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75 qFunc = new PolynomialFunction(new double [] { minQ });
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76 return;
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77 }
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78
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79 double [] ws = new double[bounds[1]-bounds[0]];
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80 double [] qs = new double[ws.length];
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81
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82 for (int i = 0; i < ws.length; ++i) {
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83 int idx = bounds[0]+i;
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84 ws[i] = wq.getW(idx);
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85 qs[i] = wq.getQ(idx);
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86 }
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87
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88 qFunc = ws.length < 3
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89 ? new LinearInterpolator().interpolate(ws, qs)
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90 : new SplineInterpolator().interpolate(ws, qs);
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91
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92 minW = wq.getW(bounds[0]);
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93 maxW = wq.getW(bounds[1]);
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94 minQ = wq.getQ(bounds[0]);
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95 maxQ = wq.getQ(bounds[1]);
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96 }
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97
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98 public double getQ(double w) {
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99
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100 try {
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101 return qFunc.value(w);
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102 }
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103 catch (FunctionEvaluationException aode) {
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104 // should not happen
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105 logger.warn("spline interpolation failed", aode);
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106 return w <= minW ? minQ : maxQ;
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107 }
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108 }
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109
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110 public static void printQ(PrintWriter out, double q) {
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111 String format;
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112 if (q < 1d) format = " % 8.3f";
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113 else if (q < 10d) format = " % 8.2f";
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114 else if (q < 100d) format = " % 8.1f";
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115 else {
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116 format = " % 8.0f";
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117 if (q > 1000d) q = Math.rint(q/10d)*10d;
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118 }
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119 out.printf(Locale.US, format, q);
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120 }
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121
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122
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123 protected static void printGaugeHeader(
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124 PrintWriter out,
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125 CallMeta callMeta,
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126 String river,
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127 double km,
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128 String gName,
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129 BigDecimal datum,
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130 Date date
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131 ) {
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132 DateFormat f = DateFormat.getDateInstance();
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133 out.print(Resources.getMsg(
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134 callMeta,
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135 I18N_AT_GAUGE_HEADER,
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136 I18N_AT_GAUGE_HEADER,
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137 new Object[] { river, gName, f.format(date), datum } ));
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138 out.print("\r\n");
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139 }
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140
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141 protected static void printHeader(
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142 PrintWriter out,
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143 CallMeta callMeta,
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144 String river,
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145 double km
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146 ) {
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147 out.print(Resources.getMsg(
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148 callMeta,
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149 I18N_AT_HEADER,
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150 I18N_AT_HEADER,
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151 new Object[] { river, km } ));
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152 out.print("\r\n");
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153 }
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154
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155 public void write(
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156 Writer writer,
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157 CallMeta meta,
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158 String river,
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159 double km,
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160 String gName,
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161 BigDecimal datum,
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162 Date date,
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163 double scale)
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164 throws IOException
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165 {
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166 PrintWriter out = new PrintWriter(writer);
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167
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168 // A header is required, because the desktop version of FLYS will skip
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169 // the first row.
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170 if (gName != null) {
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171 printGaugeHeader(out, meta, river, km, gName, datum, date);
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172 }
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173 else {
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174 printHeader(out, meta, river, km);
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175 }
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176
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177 double rest = (minW * 100.0) % 10.0;
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178
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179 double startW = Math.rint((minW - rest*0.01)*10.0)*0.1;
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180
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181 if (logger.isDebugEnabled()) {
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182 logger.debug("startW: " + startW);
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183 logger.debug("rest: " + rest);
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184 }
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185
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186 int col = 0;
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187 for (double w = startW; w <= maxW; w += 0.01) {
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188 if (col == 0) {
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189 out.printf(Locale.US, "%8d", (int)Math.round(w * scale));
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190 }
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191
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192 if (w < minW) {
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193 out.print(EMPTY);
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194 }
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195 else {
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196 printQ(out, getQ(w));
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197 }
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198
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199 if (++col >= COLUMNS) {
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200 out.print("\r\n");
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201 col = 0;
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202 }
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203 }
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204
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205 if (col > 0) {
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206 out.print("\r\n");
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207 }
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208
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209 out.flush();
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210 }
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211 }
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212 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org