Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/ATWriter.java @ 4215:c179cd02177d

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Logout the current user Add code to the logout button to remove the current user from the session and to redirect the browser window to the login page. Part of flys/issue916 (Logout: "Abmelden" Knopf mit Funktion belegen)
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 23 Oct 2012 09:59:16 +0200
parents 0c8a6145098b
children 67bbcee26e21
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
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7 import java.util.Locale;
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8
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9 import de.intevation.artifacts.CallMeta;
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10
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11 import de.intevation.flys.artifacts.model.WQ;
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12 import de.intevation.flys.artifacts.resources.Resources;
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14 import org.apache.commons.math.analysis.UnivariateRealFunction;
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16 import org.apache.commons.math.analysis.interpolation.SplineInterpolator;
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17 import org.apache.commons.math.analysis.interpolation.LinearInterpolator;
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19 import org.apache.commons.math.analysis.polynomials.PolynomialFunction;
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20
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21 import org.apache.commons.math.FunctionEvaluationException;
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22
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23 import org.apache.log4j.Logger;
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24
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25 public class ATWriter
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26 {
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27 private static Logger logger = Logger.getLogger(ATWriter.class);
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28
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29 public static final int COLUMNS = 10;
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30
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31 public static final String I18N_AT_HEADER =
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32 "export.discharge.curve.at.header";
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33
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34 public static final String EMPTY = " ";
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35
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36 protected double minW;
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37 protected double maxW;
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38 protected double minQ;
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39 protected double maxQ;
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41 protected UnivariateRealFunction qFunc;
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42
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43 public ATWriter() {
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44 }
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45
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46 public ATWriter(WQ wq) throws IllegalArgumentException {
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47
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48 int [] bounds = wq.longestIncreasingWRangeIndices();
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49
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50 if (logger.isDebugEnabled()) {
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51 logger.debug("exporting w between indices " +
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52 bounds[0] + " and " + bounds[1] + " (" +
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53 wq.getW(bounds[0]) + ", " + wq.getW(bounds[1]));
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54 }
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55
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56 if (bounds[1]-bounds[0] < 1) { // Only first w can be written out.
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57 minW = maxW = wq.getW(bounds[0]);
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58 minQ = maxQ = wq.getQ(bounds[0]);
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59 // constant function
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60 qFunc = new PolynomialFunction(new double [] { minQ });
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61 return;
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62 }
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63
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64 double [] ws = new double[bounds[1]-bounds[0]];
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65 double [] qs = new double[ws.length];
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66
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67 for (int i = 0; i < ws.length; ++i) {
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68 int idx = bounds[0]+i;
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69 ws[i] = wq.getW(idx);
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70 qs[i] = wq.getQ(idx);
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71 }
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72
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73 qFunc = ws.length < 3
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74 ? new LinearInterpolator().interpolate(ws, qs)
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75 : new SplineInterpolator().interpolate(ws, qs);
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76
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77 minW = wq.getW(bounds[0]);
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78 maxW = wq.getW(bounds[1]);
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79 minQ = wq.getQ(bounds[0]);
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80 maxQ = wq.getQ(bounds[1]);
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81 }
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82
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83 public double getQ(double w) {
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84
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85 try {
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86 return qFunc.value(w);
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87 }
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88 catch (FunctionEvaluationException aode) {
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89 // should not happen
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90 logger.warn("spline interpolation failed", aode);
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91 return w <= minW ? minQ : maxQ;
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92 }
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93 }
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94
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95 public static void printQ(PrintWriter out, double q) {
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96 String format;
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97 if (q < 1d) format = " % 8.3f";
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98 else if (q < 10d) format = " % 8.2f";
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99 else if (q < 100d) format = " % 8.1f";
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100 else {
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101 format = " % 8.0f";
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102 if (q > 1000d) q = Math.rint(q/10d)*10d;
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103 }
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104 out.printf(Locale.US, format, q);
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105 }
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106
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107
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108 protected static void printHeader(
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109 PrintWriter out,
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110 CallMeta callMeta,
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111 String river,
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112 double km
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113 ) {
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114 out.println(Resources.getMsg(
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115 callMeta,
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116 I18N_AT_HEADER,
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117 I18N_AT_HEADER,
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118 new Object[] { river, km } ));
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119 }
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120
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121
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122 public void write(Writer writer, CallMeta meta, String river, double km)
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123 throws IOException
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124 {
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125 PrintWriter out = new PrintWriter(writer);
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126
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127 // a header is required, because the desktop version of FLYS will skip
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128 // the first row.
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129 printHeader(out, meta, river, km);
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130
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131 double rest = (minW * 100.0) % 10.0;
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132
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133 double startW = Math.rint((minW - rest*0.01)*10.0)*0.1;
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134
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135 if (logger.isDebugEnabled()) {
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136 logger.debug("startW: " + startW);
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137 logger.debug("rest: " + rest);
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138 }
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139
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140 int col = 0;
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141 for (double w = startW; w <= maxW; w += 0.01) {
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142 if (col == 0) {
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143 out.printf(Locale.US, "%8d", (int)Math.round(w*100.0));
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144 }
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145
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146 if (w < minW) {
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147 out.print(EMPTY);
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148 }
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149 else {
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150 printQ(out, getQ(w));
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151 }
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152
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153 if (++col >= COLUMNS) {
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154 out.println();
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155 col = 0;
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156 }
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157 }
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158
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159 if (col > 0) {
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160 out.println();
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161 }
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162
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163 out.flush();
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164 }
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165 }
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166 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org