Mercurial > dive4elements > river
annotate flys-backend/src/main/java/de/intevation/flys/importer/parsers/WaterlevelDifferencesParser.java @ 5234:d1e24f26dee0
WaterlevelDifferencesParser: Doc and cosmetics.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 12 Mar 2013 09:40:08 +0100 |
parents | 37ff7c030ec9 |
children | ea4129a696da |
rev | line source |
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1 package de.intevation.flys.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 de.intevation.flys.importer.ImportUnit; |
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16 import de.intevation.flys.importer.ImportWaterlevelDifference; |
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17 import de.intevation.flys.importer.ImportWaterlevelDifferenceColumn; |
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18 import de.intevation.flys.importer.ImportWaterlevelDifferenceValue; |
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19 |
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20 import de.intevation.flys.importer.ImportWst; |
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21 import de.intevation.flys.importer.ImportWstColumn; |
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22 |
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23 |
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24 /** |
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25 * Parse WaterlevelDifferences CSV file. |
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26 */ |
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27 public class WaterlevelDifferencesParser extends LineParser { |
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28 |
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29 private static final Logger log = |
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30 Logger.getLogger(WaterlevelDifferencesParser.class); |
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31 |
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32 private static final NumberFormat nf = |
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33 NumberFormat.getInstance(DEFAULT_LOCALE); |
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34 |
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35 public static final Pattern META_UNIT = |
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36 Pattern.compile("^Einheit: \\[(.*)\\].*"); |
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37 |
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38 /** List of parsed differences as ImportWst s. */ |
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39 private List<ImportWst> differences; |
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40 |
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41 private ImportWstColumn[] columns; |
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42 |
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43 /** The currently processed dataset. */ |
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44 private ImportWst current; |
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45 |
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46 |
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47 public WaterlevelDifferencesParser() { |
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48 differences = new ArrayList<ImportWst>(); |
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49 } |
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50 |
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51 |
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52 /** Get the differences as wst parsed so far. */ |
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53 public List<ImportWst> getDifferences() { |
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54 return differences; |
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55 } |
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56 |
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57 |
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58 // TODO deprecate |
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59 public List<ImportWst> exportWsts() { |
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60 return differences; |
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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 * Parse a csv waterleveldifferenceparser and create a ImportWst object |
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66 * from it. |
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67 */ |
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68 @Override |
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69 public void parse(File file) throws IOException { |
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70 current = new ImportWst(file.getName()); |
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71 current.setKind(7); |
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72 |
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73 super.parse(file); |
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74 } |
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75 |
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76 |
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77 /** No rewind implemented. */ |
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78 @Override |
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79 protected void reset() { |
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80 } |
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81 |
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82 |
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83 @Override |
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84 protected void finish() { |
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85 if (columns != null && current != null) { |
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86 // TODO figure out if its needed, as the columns |
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87 // are registered at their construction time. |
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88 for (ImportWstColumn col: columns) { |
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89 // TODO place a current.addColumn(col); here? |
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90 } |
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91 |
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92 differences.add(current); |
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93 } |
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94 |
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95 current = null; |
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96 columns = null; |
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97 } |
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98 |
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99 |
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100 @Override |
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101 protected void handleLine(int lineNum, String line) { |
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102 if (line.startsWith(START_META_CHAR)) { |
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103 handleMetaLine(stripMetaLine(line)); |
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104 } |
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105 else { |
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106 handleDataLine(line); |
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107 } |
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108 } |
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109 |
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110 |
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111 private void handleMetaLine(String meta) { |
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112 if (handleMetaUnit(meta)) { |
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113 return; |
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114 } |
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115 else { |
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116 handleMetaColumnNames(meta); |
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117 } |
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118 } |
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119 |
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120 |
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121 private boolean handleMetaUnit(String meta) { |
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122 Matcher m = META_UNIT.matcher(meta); |
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123 |
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124 if (m.matches()) { |
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125 String unit = m.group(1); |
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126 log.debug("Found unit: '" + unit + "'"); |
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127 |
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128 current.setUnit(new ImportUnit(unit)); |
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129 |
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130 return true; |
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131 } |
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132 |
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133 return false; |
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134 } |
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135 |
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136 |
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137 private boolean handleMetaColumnNames(String meta) { |
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138 Pattern META_COLUMN_NAMES = Pattern.compile("Fluss-km;(.*)"); |
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139 Matcher m = META_COLUMN_NAMES.matcher(meta); |
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140 |
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141 if (m.matches()) { |
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142 String colStr = m.group(1); |
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143 String[] cols = colStr.split(SEPERATOR_CHAR); |
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144 |
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145 log.debug("Found " + cols.length + " columns."); |
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146 |
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147 initColumns(cols); |
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148 |
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149 return true; |
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150 } |
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151 |
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152 return false; |
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153 } |
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154 |
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155 |
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156 private void initColumns(String[] cols) { |
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157 columns = new ImportWstColumn[cols.length]; |
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158 |
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159 for (int i = 0; i < cols.length; i++) { |
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160 String name = cols[i].replace("\"", ""); |
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161 |
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162 log.debug("Create new column '" + name + "'"); |
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163 columns[i] = new ImportWstColumn(current, name, name, i); |
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164 } |
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165 } |
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166 |
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167 |
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168 private void handleDataLine(String line) { |
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169 String[] cols = line.split(SEPERATOR_CHAR); |
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170 |
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171 if (cols == null || cols.length < 2) { |
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172 log.warn("skip invalid waterlevel-diff line: '" + line + "'"); |
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173 return; |
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174 } |
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175 |
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176 try { |
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177 Double station = nf.parse(cols[0]).doubleValue(); |
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178 |
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179 for (int i = 0; i < columns.length; i++) { |
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180 int idx = i+1; |
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181 |
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182 if (idx >= cols.length) { |
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183 log.warn("Insufficient column numbers: " + line); |
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184 continue; |
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185 } |
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186 |
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187 String value = cols[idx]; |
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188 |
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189 try { |
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190 columns[i].addColumnValue( |
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191 new BigDecimal(station), |
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192 new BigDecimal(nf.parse(value).doubleValue())); |
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193 } |
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194 catch (ParseException pe) { |
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195 log.warn("Error while parsing value: '" + value + "'"); |
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196 } |
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197 } |
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198 } |
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199 catch (ParseException pe) { |
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200 log.warn("Error while parsing station: '" + line + "'"); |
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201 } |
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202 } |
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203 } |
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204 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |