Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/WaterlevelDifferencesParser.java @ 6286:b47ab6a21425
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author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 12 Jun 2013 11:18:47 +0200 |
parents | 62dca91ca229 |
children | 8d9e9b1ded7d |
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.importer.parsers; |
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10 |
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11 import java.io.File; |
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12 import java.io.IOException; |
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13 import java.math.BigDecimal; |
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14 import java.text.NumberFormat; |
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15 import java.text.ParseException; |
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16 import java.util.ArrayList; |
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17 import java.util.List; |
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18 import java.util.regex.Matcher; |
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19 import java.util.regex.Pattern; |
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20 |
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21 import org.apache.log4j.Logger; |
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22 |
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23 import org.dive4elements.river.importer.ImportUnit; |
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24 |
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25 import org.dive4elements.river.importer.ImportWst; |
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26 import org.dive4elements.river.importer.ImportWstColumn; |
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27 |
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28 |
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29 /** |
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30 * Parse WaterlevelDifferences CSV file. |
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31 */ |
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32 public class WaterlevelDifferencesParser extends LineParser { |
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33 |
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34 private static final Logger log = |
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35 Logger.getLogger(WaterlevelDifferencesParser.class); |
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36 |
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37 private static final NumberFormat nf = |
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38 NumberFormat.getInstance(DEFAULT_LOCALE); |
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39 |
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40 public static final Pattern META_UNIT = |
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41 Pattern.compile("^Einheit: \\[(.*)\\].*"); |
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42 |
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43 /** List of parsed differences as ImportWst s. */ |
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44 private List<ImportWst> differences; |
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45 |
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46 private ImportWstColumn[] columns; |
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47 |
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48 /** The currently processed dataset. */ |
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49 private ImportWst current; |
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50 |
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51 |
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52 public WaterlevelDifferencesParser() { |
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53 differences = new ArrayList<ImportWst>(); |
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54 } |
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55 |
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56 |
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57 /** Get the differences as wst parsed so far. */ |
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58 public List<ImportWst> getDifferences() { |
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59 return differences; |
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60 } |
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61 |
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62 |
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63 /** |
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64 * Parse a csv waterleveldifferenceparser and create a ImportWst object |
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65 * from it. |
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66 */ |
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67 @Override |
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68 public void parse(File file) throws IOException { |
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69 current = new ImportWst(file.getName()); |
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70 current.setKind(6); |
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71 |
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72 super.parse(file); |
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73 } |
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74 |
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75 |
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76 /** No rewind implemented. */ |
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77 @Override |
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78 protected void reset() { |
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79 } |
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80 |
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81 |
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82 @Override |
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83 protected void finish() { |
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84 if (columns != null && current != null) { |
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85 // TODO figure out if its needed, as the columns |
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86 // are registered at their construction time. |
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87 for (ImportWstColumn col: columns) { |
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88 // TODO place a current.addColumn(col); here? |
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89 } |
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90 |
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91 differences.add(current); |
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92 } |
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93 |
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94 current = null; |
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95 columns = null; |
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96 } |
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97 |
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98 |
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99 @Override |
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100 protected void handleLine(int lineNum, String line) { |
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101 if (line.startsWith(START_META_CHAR)) { |
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102 handleMetaLine(stripMetaLine(line)); |
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103 } |
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104 else { |
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105 handleDataLine(line); |
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106 } |
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107 } |
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108 |
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109 |
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110 private void handleMetaLine(String meta) { |
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111 if (handleMetaUnit(meta)) { |
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112 return; |
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113 } |
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114 else { |
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115 handleMetaColumnNames(meta); |
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116 } |
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117 } |
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118 |
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119 |
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120 private boolean handleMetaUnit(String meta) { |
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121 Matcher m = META_UNIT.matcher(meta); |
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122 |
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123 if (m.matches()) { |
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124 String unit = m.group(1); |
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125 log.debug("Found unit: '" + unit + "'"); |
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126 |
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127 current.setUnit(new ImportUnit(unit)); |
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128 |
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129 return true; |
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130 } |
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131 |
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132 return false; |
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133 } |
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134 |
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135 |
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136 private boolean handleMetaColumnNames(String meta) { |
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137 Pattern META_COLUMN_NAMES = Pattern.compile("Fluss-km;(.*)"); |
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138 Matcher m = META_COLUMN_NAMES.matcher(meta); |
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139 |
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140 if (m.matches()) { |
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141 String colStr = m.group(1); |
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142 String[] cols = colStr.split(SEPERATOR_CHAR); |
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143 |
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144 log.debug("Found " + cols.length + " columns."); |
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145 |
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146 initColumns(cols); |
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147 |
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148 return true; |
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149 } |
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150 |
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151 return false; |
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152 } |
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153 |
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154 |
6286 | 155 /** Setup column structures with name, description and time interval. */ |
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156 private void initColumns(String[] cols) { |
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157 current.setNumberColumns(cols.length); |
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158 columns = current.getColumns().toArray(new ImportWstColumn[cols.length]); |
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159 |
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160 for (int i = 0; i < cols.length; i++) { |
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161 String name = cols[i].replace("\"", ""); |
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162 |
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163 log.debug("Create new column '" + name + "'"); |
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164 current.getColumn(i).setName(name); |
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165 current.getColumn(i).setDescription(name); |
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166 } |
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167 } |
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168 |
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169 |
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170 private void handleDataLine(String line) { |
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171 String[] cols = line.split(SEPERATOR_CHAR); |
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172 |
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173 if (cols == null || cols.length < 2) { |
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174 log.warn("skip invalid waterlevel-diff line: '" + line + "'"); |
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175 return; |
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176 } |
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177 |
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178 try { |
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179 Double station = nf.parse(cols[0]).doubleValue(); |
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180 |
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181 for (int i = 0; i < columns.length; i++) { |
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182 int idx = i+1; |
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183 |
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184 if (idx >= cols.length) { |
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185 log.warn("Insufficient column numbers: " + line); |
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186 continue; |
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187 } |
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188 |
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189 String value = cols[idx]; |
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190 |
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191 try { |
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192 columns[i].addColumnValue( |
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193 new BigDecimal(station), |
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194 new BigDecimal(nf.parse(value).doubleValue())); |
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195 } |
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196 catch (ParseException pe) { |
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197 log.warn("Could not parse value: '" + value + "'"); |
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198 } |
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199 } |
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200 } |
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201 catch (ParseException pe) { |
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202 log.warn("Could not parse station: '" + line + "'"); |
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203 } |
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204 } |
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205 } |
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206 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |