Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/importer/parsers/WaterlevelDifferencesParser.java @ 6286:b47ab6a21425

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Doc.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
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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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
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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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37ff7c030ec9 WaterlevelDifferencesParser: Create ImportWsts directly.
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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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b3dd14fc13a6 Parsers: do not call warnings error
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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 :
http://dive4elements.wald.intevation.org