Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/exports/WstWriter.java @ 1744:62efd1288e34
Fix setting of masterartifact in flyscollections.
flys-artifacts/trunk@3038 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 19 Oct 2011 16:04:40 +0000 |
parents | 72bcbc308501 |
children | d9fb3a178be4 |
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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; |
446
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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 |
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32 /** The default unit that is written into the header of the WST.*/ |
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33 public static final String DEFAULT_UNIT = "Wassserstand [NN + m]"; |
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34 |
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35 |
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36 /** The lines that need to be included for the export.*/ |
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37 protected Map<Double, WstLine> lines; |
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38 |
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39 /** The column names.*/ |
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40 protected List<String> columnNames; |
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41 |
446
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42 /** The locale used to format the values.*/ |
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43 protected Locale locale; |
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44 |
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45 /** The number of discharge columns.*/ |
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46 protected int cols; |
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47 |
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48 /** The last Q values.*/ |
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49 protected double[] qs; |
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50 |
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51 |
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52 |
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53 /** |
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54 * This constructor creates a new WstWriter with an OutputStream and a |
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55 * number of Q columns. |
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56 * |
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57 * @param out The output stream where the WST is written to. |
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58 * @param cols The number of columns of the resulting WST. |
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59 */ |
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60 public WstWriter(int cols) { |
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61 this.columnNames = new ArrayList<String>(cols); |
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62 this.lines = new HashMap<Double, WstLine>(); |
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63 this.qs = new double[cols]; |
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64 this.locale = Locale.US; |
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65 } |
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66 |
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67 |
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68 /** |
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69 * This method is used to create the WST from the data that has been |
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70 * inserted using add(double[]) before. |
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71 */ |
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72 public void write(OutputStream out) { |
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73 logger.info("WstWriter.write"); |
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74 |
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75 PrintWriter writer = new PrintWriter( |
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76 new BufferedWriter( |
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77 new OutputStreamWriter(out))); |
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78 |
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79 this.qs = new double[cols]; |
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80 |
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81 writeHeader(writer); |
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82 |
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83 Collection<WstLine> collection = new TreeMap(lines).values(); |
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84 |
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85 for (WstLine line: collection) { |
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86 writeWLine(writer, line); |
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87 } |
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88 |
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89 writer.flush(); |
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90 writer.close(); |
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91 } |
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92 |
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93 |
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94 /** |
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95 * This method is used to add a new line to the WST. |
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96 * |
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97 * @param wqkms A 3dim double array with [W,Q, KM]. |
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98 */ |
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99 public void add(double[] wqkms) { |
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100 Double km = wqkms[2]; |
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101 |
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102 WstLine line = lines.get(km); |
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103 |
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104 if (line == null) { |
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105 line = new WstLine(km.doubleValue()); |
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106 lines.put(km, line); |
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107 } |
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108 |
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109 line.add(wqkms[0], wqkms[1]); |
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110 } |
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111 |
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112 |
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113 public void addCorrected(double[] wqckms) { |
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114 Double km = wqckms[2]; |
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115 |
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116 WstLine line = lines.get(km); |
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117 |
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118 if (line == null) { |
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119 line = new WstLine(km.doubleValue()); |
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120 lines.put(km, line); |
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121 } |
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122 |
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123 line.add(wqckms[3], wqckms[1]); |
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124 } |
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125 |
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126 |
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127 /** |
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128 * Adds a further column name. |
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129 * |
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130 * @param name The name of the new column. |
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131 */ |
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132 public void addColumn(String name) { |
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133 if (name != null) { |
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134 cols++; |
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135 |
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136 String basename = name; |
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137 |
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138 int i = 0; |
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139 while (columnNames.contains(name)) { |
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140 name = basename + "_" + i++; |
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141 |
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142 if (name.length() > 9) { |
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143 name = name.substring(name.length() - 9); |
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144 } |
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145 } |
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146 |
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147 columnNames.add(name); |
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148 } |
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149 } |
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150 |
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151 |
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152 /** |
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153 * This method writes the header of the WST. |
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154 * |
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155 * @param writer The PrintWriter that creates the output. |
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156 */ |
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157 protected void writeHeader(PrintWriter writer) { |
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158 logger.debug("WstWriter.writeHeader"); |
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159 |
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160 writer.println(cols); |
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161 writer.print(" "); |
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162 |
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163 for (String columnName: columnNames) { |
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164 writer.printf(locale, "%9s", columnName); |
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165 } |
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166 |
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167 writer.println(); |
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168 |
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169 writer.write("* KM "); |
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170 writer.write(DEFAULT_UNIT); |
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171 writer.println(); |
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172 } |
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173 |
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174 |
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175 /** |
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176 * This method writes a line with W values and a certain kilometer. |
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177 * |
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178 * @param writer The PrintWriter that is used to create the output. |
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179 * @param line The WstLine that should be written to the output. |
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180 */ |
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181 protected void writeWLine(PrintWriter writer, WstLine line) { |
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182 double km = line.getKm(); |
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183 double[] qs = line.getQs(); |
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184 int num = line.getSize(); |
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185 |
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186 if (dischargesChanged(qs)) { |
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187 writeQLine(writer, qs); |
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188 } |
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189 |
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190 writer.printf(locale, "%8.3f", km); |
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191 |
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192 for (int i = 0; i < num; i++) { |
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193 writer.printf(locale, "%9.2f", line.getW(i)); |
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194 } |
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195 |
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196 writer.println(); |
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197 } |
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198 |
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199 |
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200 /** |
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201 * Writes a discharge line (Q values) into a WST. |
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202 * |
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203 * @param qs the Q values for the next range. |
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204 */ |
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205 protected void writeQLine(PrintWriter writer, double[] qs) { |
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206 writer.write("*\u001f "); |
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207 |
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208 for (int i = 0; i < qs.length; i++) { |
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209 this.qs[i] = qs[i]; |
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210 |
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211 writer.printf(locale, "%9.2f", qs[i]); |
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212 } |
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213 |
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214 writer.println(); |
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215 } |
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216 |
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217 |
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218 /** |
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219 * This method determines if a Q has changed from the last line to the |
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220 * current one. |
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221 * |
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222 * @param newQs The Q values of the next line. |
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223 * |
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224 * @return true, if a Q value have changed, otherwise false. |
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225 */ |
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226 protected boolean dischargesChanged(double[] newQs) { |
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227 // XXX maybe there is a way to do this faster |
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228 for (int i = 0; i < cols; i++) { |
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229 if (Math.abs(newQs[i] - qs[i]) >= 0.001) { |
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230 return true; |
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231 } |
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232 } |
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233 |
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234 return false; |
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235 } |
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236 } |
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237 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |