Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/exports/WstWriter.java @ 7615:edb323a4c286
(issue1620) join column names with two empty spaces
The size limit of 9 characters is already enforced in addcolumn
so this can be safely removed.
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Fri, 29 Nov 2013 11:13:31 +0100 |
parents | 05549a84ee83 |
children | 197bd0958cba |
rev | line source |
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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.BufferedWriter; |
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12 import java.io.OutputStream; |
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13 import java.io.OutputStreamWriter; |
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14 import java.io.PrintWriter; |
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15 |
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16 import java.util.ArrayList; |
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17 import java.util.Collection; |
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18 import java.util.HashMap; |
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19 import java.util.List; |
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20 import java.util.Locale; |
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21 import java.util.Map; |
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22 import java.util.TreeMap; |
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23 |
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24 import org.apache.log4j.Logger; |
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25 import org.apache.commons.lang.StringUtils; |
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26 |
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27 import org.dive4elements.river.artifacts.model.WstLine; |
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28 |
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29 |
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30 /** |
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31 * A writer that creates WSTs. |
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32 * |
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33 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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34 */ |
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35 public class WstWriter { |
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36 |
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37 /** The logger used in this class. */ |
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38 private static Logger logger = Logger.getLogger(WstWriter.class); |
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39 |
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40 /** The default unit that is written into the header of the WST. */ |
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41 public static final String DEFAULT_UNIT = "Wassserstand [NN + m]"; |
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42 |
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43 /** The lines that need to be included for the export. */ |
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44 protected Map<Double, WstLine> lines; |
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45 |
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46 /** The column names. */ |
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47 protected List<String> columnNames; |
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48 |
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49 /** The locale used to format the values. */ |
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50 protected Locale locale; |
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51 |
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52 /** The number of discharge columns. */ |
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53 protected int cols; |
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54 |
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55 /** The last Q values. */ |
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56 protected double[] qs; |
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57 |
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58 |
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59 |
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60 /** |
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61 * This constructor creates a new WstWriter with a number of Q columns. |
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62 * |
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63 * @param cols The number of columns of the resulting WST. |
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64 */ |
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65 public WstWriter(int cols) { |
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66 this.columnNames = new ArrayList<String>(cols); |
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67 this.lines = new HashMap<Double, WstLine>(); |
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68 this.qs = new double[cols]; |
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69 this.locale = Locale.US; |
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70 } |
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71 |
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72 |
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73 /** |
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74 * This method is used to create the WST from the data that has been |
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75 * inserted using add(double[]) before. |
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76 * @param out Where to write to. |
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77 */ |
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78 public void write(OutputStream out) { |
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79 logger.info("WstWriter.write"); |
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80 |
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81 PrintWriter writer = new PrintWriter( |
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82 new BufferedWriter( |
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83 new OutputStreamWriter(out))); |
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84 |
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85 this.qs = new double[cols]; |
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86 |
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87 writeHeader(writer); |
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88 |
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89 Collection<WstLine> collection = new TreeMap(lines).values(); |
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90 |
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91 for (WstLine line: collection) { |
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92 writeWLine(writer, line); |
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93 } |
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94 |
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95 writer.flush(); |
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96 writer.close(); |
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97 } |
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98 |
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99 |
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100 /** |
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101 * This method is used to add a new line to the WST. |
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102 * |
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103 * @param wqkms A 3dim double array with [W,Q, KM]. |
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104 */ |
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105 public void add(double[] wqkms) { |
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106 Double km = wqkms[2]; |
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107 |
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108 WstLine line = lines.get(km); |
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109 |
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110 if (line == null) { |
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111 line = new WstLine(km.doubleValue()); |
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112 lines.put(km, line); |
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113 } |
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114 |
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115 line.add(wqkms[0], wqkms[1]); |
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116 } |
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117 |
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118 |
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119 public void addCorrected(double[] wqckms) { |
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120 Double km = wqckms[2]; |
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121 |
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122 WstLine line = lines.get(km); |
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123 |
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124 if (line == null) { |
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125 line = new WstLine(km.doubleValue()); |
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126 lines.put(km, line); |
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127 } |
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128 |
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129 line.add(wqckms[3], wqckms[1]); |
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130 } |
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131 |
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132 |
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133 /** |
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134 * Adds a further column name. |
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135 * |
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136 * @param name The name of the new column. |
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137 */ |
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138 public void addColumn(String name) { |
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139 if (name != null) { |
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140 cols++; |
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141 |
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142 String basename = name; |
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143 |
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144 int i = 0; |
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145 while (columnNames.contains(name)) { |
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146 name = basename + "_" + i++; |
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147 |
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148 if (name.length() > 9) { |
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149 name = name.substring(name.length() - 9); |
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150 } |
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151 } |
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152 |
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153 columnNames.add(name); |
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154 } |
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155 } |
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156 |
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157 |
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158 /** |
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159 * This method writes the header of the WST. |
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160 * |
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161 * @param writer The PrintWriter that creates the output. |
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162 */ |
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163 protected void writeHeader(PrintWriter writer) { |
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164 logger.debug("WstWriter.writeHeader"); |
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165 |
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166 writer.println(cols); |
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167 writer.print(" "); |
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168 |
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169 writer.print(StringUtils.join(columnNames, " ")); |
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170 |
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171 writer.println(); |
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172 |
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173 writer.write("* KM "); |
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174 writer.write(DEFAULT_UNIT); |
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175 writer.println(); |
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176 } |
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177 |
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178 |
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179 /** |
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180 * This method writes a line with W values and a certain kilometer. |
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181 * |
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182 * @param writer The PrintWriter that is used to create the output. |
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183 * @param line The WstLine that should be written to the output. |
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184 */ |
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185 protected void writeWLine(PrintWriter writer, WstLine line) { |
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186 double km = line.getKm(); |
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187 double[] qs = line.getQs(); |
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188 int num = line.getSize(); |
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189 |
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190 if (dischargesChanged(qs)) { |
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191 writeQLine(writer, qs); |
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192 } |
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193 |
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194 writer.printf(locale, "%8.3f", km); |
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195 |
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196 for (int i = 0; i < num; i++) { |
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197 writer.printf(locale, "%9.2f", line.getW(i)); |
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198 } |
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199 |
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200 writer.println(); |
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201 } |
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202 |
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203 |
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204 /** |
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205 * Writes a discharge line (Q values) into a WST. |
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206 * |
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207 * @param qs the Q values for the next range. |
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208 */ |
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209 protected void writeQLine(PrintWriter writer, double[] qs) { |
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210 writer.write("*\u001f "); |
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211 |
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212 for (int i = 0; i < qs.length; i++) { |
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213 this.qs[i] = qs[i]; |
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214 |
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215 writer.printf(locale, "%9.2f", qs[i]); |
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216 } |
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217 |
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218 writer.println(); |
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219 } |
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220 |
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221 |
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222 /** |
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223 * This method determines if a Q has changed from the last line to the |
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224 * current one. |
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225 * |
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226 * @param newQs The Q values of the next line. |
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227 * |
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228 * @return true, if a Q value have changed, otherwise false. |
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229 */ |
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230 protected boolean dischargesChanged(double[] newQs) { |
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231 // XXX maybe there is a way to do this faster |
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232 for (int i = 0; i < cols && i < qs.length && i < newQs.length; i++) { |
446
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233 if (Math.abs(newQs[i] - qs[i]) >= 0.001) { |
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234 return true; |
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235 } |
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236 } |
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237 |
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238 return false; |
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239 } |
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240 |
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241 /** |
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242 * Get the lines that have alreay been added to this writer |
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243 * lines are a map with km as the key and a wstline as value */ |
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244 public Map<Double, WstLine> getLines() { |
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245 return lines; |
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246 } |
446
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247 } |
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248 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |