Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/WaterlevelDifferencesParser.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Thu, 25 Apr 2013 15:23:37 +0200 |
parents | flys-backend/src/main/java/org/dive4elements/river/importer/parsers/WaterlevelDifferencesParser.java@18619c1e7c2a |
children | 4dd33b86dc61 |
rev | line source |
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1 package org.dive4elements.river.importer.parsers; |
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2 |
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3 import java.io.File; |
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4 import java.io.IOException; |
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5 import java.math.BigDecimal; |
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6 import java.text.NumberFormat; |
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7 import java.text.ParseException; |
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8 import java.util.ArrayList; |
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9 import java.util.List; |
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10 import java.util.regex.Matcher; |
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11 import java.util.regex.Pattern; |
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12 |
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13 import org.apache.log4j.Logger; |
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14 |
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15 import org.dive4elements.river.importer.ImportUnit; |
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16 |
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17 import org.dive4elements.river.importer.ImportWst; |
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18 import org.dive4elements.river.importer.ImportWstColumn; |
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19 |
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20 |
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21 /** |
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22 * Parse WaterlevelDifferences CSV file. |
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23 */ |
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24 public class WaterlevelDifferencesParser extends LineParser { |
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25 |
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26 private static final Logger log = |
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27 Logger.getLogger(WaterlevelDifferencesParser.class); |
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28 |
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29 private static final NumberFormat nf = |
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30 NumberFormat.getInstance(DEFAULT_LOCALE); |
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31 |
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32 public static final Pattern META_UNIT = |
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33 Pattern.compile("^Einheit: \\[(.*)\\].*"); |
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34 |
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35 /** List of parsed differences as ImportWst s. */ |
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36 private List<ImportWst> differences; |
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37 |
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38 private ImportWstColumn[] columns; |
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39 |
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40 /** The currently processed dataset. */ |
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41 private ImportWst current; |
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42 |
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43 |
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44 public WaterlevelDifferencesParser() { |
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45 differences = new ArrayList<ImportWst>(); |
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46 } |
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47 |
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48 |
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49 /** Get the differences as wst parsed so far. */ |
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50 public List<ImportWst> getDifferences() { |
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51 return differences; |
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52 } |
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53 |
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54 |
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55 /** |
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56 * Parse a csv waterleveldifferenceparser and create a ImportWst object |
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57 * from it. |
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58 */ |
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59 @Override |
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60 public void parse(File file) throws IOException { |
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61 current = new ImportWst(file.getName()); |
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62 current.setKind(7); |
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63 |
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64 super.parse(file); |
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65 } |
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66 |
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67 |
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68 /** No rewind implemented. */ |
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69 @Override |
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70 protected void reset() { |
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71 } |
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72 |
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73 |
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74 @Override |
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75 protected void finish() { |
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76 if (columns != null && current != null) { |
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77 // TODO figure out if its needed, as the columns |
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78 // are registered at their construction time. |
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79 for (ImportWstColumn col: columns) { |
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80 // TODO place a current.addColumn(col); here? |
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81 } |
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82 |
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83 differences.add(current); |
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84 } |
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85 |
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86 current = null; |
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87 columns = null; |
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88 } |
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89 |
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90 |
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91 @Override |
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92 protected void handleLine(int lineNum, String line) { |
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93 if (line.startsWith(START_META_CHAR)) { |
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94 handleMetaLine(stripMetaLine(line)); |
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95 } |
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96 else { |
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97 handleDataLine(line); |
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98 } |
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99 } |
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100 |
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101 |
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102 private void handleMetaLine(String meta) { |
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103 if (handleMetaUnit(meta)) { |
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104 return; |
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105 } |
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106 else { |
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107 handleMetaColumnNames(meta); |
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108 } |
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109 } |
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110 |
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111 |
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112 private boolean handleMetaUnit(String meta) { |
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113 Matcher m = META_UNIT.matcher(meta); |
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114 |
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115 if (m.matches()) { |
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116 String unit = m.group(1); |
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117 log.debug("Found unit: '" + unit + "'"); |
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118 |
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119 current.setUnit(new ImportUnit(unit)); |
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120 |
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121 return true; |
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122 } |
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123 |
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124 return false; |
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125 } |
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126 |
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127 |
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128 private boolean handleMetaColumnNames(String meta) { |
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129 Pattern META_COLUMN_NAMES = Pattern.compile("Fluss-km;(.*)"); |
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130 Matcher m = META_COLUMN_NAMES.matcher(meta); |
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131 |
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132 if (m.matches()) { |
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133 String colStr = m.group(1); |
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134 String[] cols = colStr.split(SEPERATOR_CHAR); |
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135 |
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136 log.debug("Found " + cols.length + " columns."); |
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137 |
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138 initColumns(cols); |
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139 |
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140 return true; |
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141 } |
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142 |
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143 return false; |
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144 } |
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145 |
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146 |
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147 private void initColumns(String[] cols) { |
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148 current.setNumberColumns(cols.length); |
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149 columns = current.getColumns().toArray(new ImportWstColumn[cols.length]); |
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150 |
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151 for (int i = 0; i < cols.length; i++) { |
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152 String name = cols[i].replace("\"", ""); |
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153 |
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154 log.debug("Create new column '" + name + "'"); |
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155 current.getColumn(i).setName(name); |
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156 current.getColumn(i).setDescription(name); |
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157 } |
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158 } |
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159 |
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160 |
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161 private void handleDataLine(String line) { |
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162 String[] cols = line.split(SEPERATOR_CHAR); |
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163 |
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164 if (cols == null || cols.length < 2) { |
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165 log.warn("skip invalid waterlevel-diff line: '" + line + "'"); |
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166 return; |
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167 } |
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168 |
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169 try { |
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170 Double station = nf.parse(cols[0]).doubleValue(); |
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171 |
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172 for (int i = 0; i < columns.length; i++) { |
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173 int idx = i+1; |
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174 |
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175 if (idx >= cols.length) { |
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176 log.warn("Insufficient column numbers: " + line); |
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177 continue; |
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178 } |
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179 |
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180 String value = cols[idx]; |
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181 |
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182 try { |
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183 columns[i].addColumnValue( |
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184 new BigDecimal(station), |
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185 new BigDecimal(nf.parse(value).doubleValue())); |
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186 } |
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187 catch (ParseException pe) { |
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188 log.warn("Could not parse value: '" + value + "'"); |
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189 } |
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190 } |
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191 } |
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192 catch (ParseException pe) { |
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193 log.warn("Could not parse station: '" + line + "'"); |
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194 } |
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195 } |
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196 } |
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197 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |