Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/parsers/WaterlevelDifferencesParser.java @ 5234:d1e24f26dee0

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WaterlevelDifferencesParser: Doc and cosmetics.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 12 Mar 2013 09:40:08 +0100
parents 37ff7c030ec9
children ea4129a696da
rev   line source
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a1402c16152f Added a parser and importer classes used to import waterlevel differences.
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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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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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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 :
http://dive4elements.wald.intevation.org