Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/exports/WstWriter.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 d9af29a4bb85
children
rev   line source
446
c0bec245f608 Implemented writer that creates WSTs and enabled the WaterlevelExporter to create those.
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1 package de.intevation.flys.exports;
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2
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3 import java.io.BufferedWriter;
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4 import java.io.OutputStream;
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5 import java.io.OutputStreamWriter;
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6 import java.io.PrintWriter;
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7
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8 import java.util.ArrayList;
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9 import java.util.Collection;
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10 import java.util.HashMap;
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11 import java.util.List;
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12 import java.util.Locale;
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13 import java.util.Map;
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14 import java.util.TreeMap;
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15
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16 import org.apache.log4j.Logger;
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17
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18 import de.intevation.flys.artifacts.model.WstLine;
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19
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20
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21 /**
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22 * A writer that creates WSTs.
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23 *
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24 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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25 */
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26 public class WstWriter {
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27
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28 /** The logger used in this class. */
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29 private static Logger logger = Logger.getLogger(WstWriter.class);
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30
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31 /** The default unit that is written into the header of the WST. */
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32 public static final String DEFAULT_UNIT = "Wassserstand [NN + m]";
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33
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34 /** The lines that need to be included for the export. */
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35 protected Map<Double, WstLine> lines;
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36
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37 /** The column names. */
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38 protected List<String> columnNames;
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39
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40 /** The locale used to format the values. */
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41 protected Locale locale;
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42
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43 /** The number of discharge columns. */
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44 protected int cols;
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46 /** The last Q values. */
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47 protected double[] qs;
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49
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50
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51 /**
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52 * This constructor creates a new WstWriter with a number of Q columns.
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53 *
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54 * @param cols The number of columns of the resulting WST.
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55 */
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56 public WstWriter(int cols) {
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57 this.columnNames = new ArrayList<String>(cols);
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58 this.lines = new HashMap<Double, WstLine>();
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59 this.qs = new double[cols];
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60 this.locale = Locale.US;
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61 }
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62
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63
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64 /**
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65 * This method is used to create the WST from the data that has been
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66 * inserted using add(double[]) before.
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67 * @param out Where to write to.
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68 */
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69 public void write(OutputStream out) {
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70 logger.info("WstWriter.write");
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71
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72 PrintWriter writer = new PrintWriter(
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73 new BufferedWriter(
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74 new OutputStreamWriter(out)));
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75
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76 this.qs = new double[cols];
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77
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78 writeHeader(writer);
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79
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80 Collection<WstLine> collection = new TreeMap(lines).values();
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81
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82 for (WstLine line: collection) {
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83 writeWLine(writer, line);
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84 }
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85
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86 writer.flush();
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87 writer.close();
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88 }
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91 /**
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92 * This method is used to add a new line to the WST.
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93 *
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94 * @param wqkms A 3dim double array with [W,Q, KM].
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95 */
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96 public void add(double[] wqkms) {
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97 Double km = wqkms[2];
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98
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99 WstLine line = lines.get(km);
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100
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101 if (line == null) {
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102 line = new WstLine(km.doubleValue());
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103 lines.put(km, line);
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104 }
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105
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106 line.add(wqkms[0], wqkms[1]);
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107 }
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108
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109
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110 public void addCorrected(double[] wqckms) {
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111 Double km = wqckms[2];
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112
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113 WstLine line = lines.get(km);
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114
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115 if (line == null) {
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116 line = new WstLine(km.doubleValue());
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117 lines.put(km, line);
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118 }
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119
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120 line.add(wqckms[3], wqckms[1]);
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121 }
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122
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123
446
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124 /**
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125 * Adds a further column name.
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126 *
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127 * @param name The name of the new column.
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128 */
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129 public void addColumn(String name) {
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130 if (name != null) {
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131 cols++;
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132
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133 String basename = name;
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134
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135 int i = 0;
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136 while (columnNames.contains(name)) {
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137 name = basename + "_" + i++;
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138
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139 if (name.length() > 9) {
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140 name = name.substring(name.length() - 9);
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141 }
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142 }
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143
447
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144 columnNames.add(name);
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145 }
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146 }
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147
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148
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149 /**
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150 * This method writes the header of the WST.
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151 *
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152 * @param writer The PrintWriter that creates the output.
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153 */
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154 protected void writeHeader(PrintWriter writer) {
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155 logger.debug("WstWriter.writeHeader");
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156
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157 writer.println(cols);
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158 writer.print(" ");
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159
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160 for (String columnName: columnNames) {
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161 writer.printf(locale, "%9s", columnName);
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162 }
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163
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164 writer.println();
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165
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166 writer.write("* KM ");
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167 writer.write(DEFAULT_UNIT);
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168 writer.println();
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169 }
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170
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171
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172 /**
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173 * This method writes a line with W values and a certain kilometer.
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174 *
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175 * @param writer The PrintWriter that is used to create the output.
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176 * @param line The WstLine that should be written to the output.
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177 */
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178 protected void writeWLine(PrintWriter writer, WstLine line) {
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179 double km = line.getKm();
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180 double[] qs = line.getQs();
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181 int num = line.getSize();
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182
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183 if (dischargesChanged(qs)) {
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184 writeQLine(writer, qs);
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185 }
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186
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187 writer.printf(locale, "%8.3f", km);
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188
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189 for (int i = 0; i < num; i++) {
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190 writer.printf(locale, "%9.2f", line.getW(i));
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191 }
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192
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193 writer.println();
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194 }
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195
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196
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197 /**
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198 * Writes a discharge line (Q values) into a WST.
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199 *
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200 * @param qs the Q values for the next range.
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201 */
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202 protected void writeQLine(PrintWriter writer, double[] qs) {
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203 writer.write("*\u001f ");
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204
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205 for (int i = 0; i < qs.length; i++) {
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206 this.qs[i] = qs[i];
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207
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208 writer.printf(locale, "%9.2f", qs[i]);
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209 }
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210
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211 writer.println();
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212 }
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213
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214
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215 /**
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216 * This method determines if a Q has changed from the last line to the
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217 * current one.
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218 *
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219 * @param newQs The Q values of the next line.
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220 *
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221 * @return true, if a Q value have changed, otherwise false.
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222 */
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223 protected boolean dischargesChanged(double[] newQs) {
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224 // XXX maybe there is a way to do this faster
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225 for (int i = 0; i < cols; i++) {
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226 if (Math.abs(newQs[i] - qs[i]) >= 0.001) {
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227 return true;
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228 }
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229 }
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230
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231 return false;
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232 }
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233 }
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234 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org