Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/WaterlevelDifferencesParser.java @ 6291:33ccce4a3aae
WaterlevelDifferencesParser: issue1354/1, set timeintervals from waterdiff-csvs.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 12 Jun 2013 11:52:19 +0200 |
parents | db7d0600d39d |
children | 6cdafb6feee1 |
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.ImportTimeInterval; |
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24 import org.dive4elements.river.importer.ImportUnit; |
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25 |
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26 import org.dive4elements.river.importer.ImportWst; |
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27 import org.dive4elements.river.importer.ImportWstColumn; |
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28 |
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29 |
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30 /** |
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31 * Parse WaterlevelDifferences CSV file. |
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32 */ |
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33 public class WaterlevelDifferencesParser extends LineParser { |
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34 |
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35 private static final Logger log = |
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36 Logger.getLogger(WaterlevelDifferencesParser.class); |
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37 |
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38 private static final NumberFormat nf = |
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39 NumberFormat.getInstance(DEFAULT_LOCALE); |
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40 |
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41 public static final Pattern META_UNIT = |
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42 Pattern.compile("^Einheit: \\[(.*)\\].*"); |
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43 |
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44 public static final Pattern YEARS_IN_COLUMN = |
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45 Pattern.compile(".*(\\d{4})-(\\d{4})$"); |
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46 |
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47 /** List of parsed differences as ImportWst s. */ |
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48 private List<ImportWst> differences; |
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49 |
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50 private ImportWstColumn[] columns; |
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51 |
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52 /** The currently processed dataset. */ |
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53 private ImportWst current; |
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54 |
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55 |
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56 public WaterlevelDifferencesParser() { |
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57 differences = new ArrayList<ImportWst>(); |
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58 } |
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59 |
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60 |
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61 /** Get the differences as wst parsed so far. */ |
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62 public List<ImportWst> getDifferences() { |
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63 return differences; |
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64 } |
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65 |
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66 |
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67 /** |
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68 * Parse a csv waterleveldifferenceparser and create a ImportWst object |
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69 * from it. |
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70 */ |
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71 @Override |
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72 public void parse(File file) throws IOException { |
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73 current = new ImportWst(file.getName()); |
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74 current.setKind(6); |
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75 |
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76 super.parse(file); |
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77 } |
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78 |
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79 |
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80 /** No rewind implemented. */ |
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81 @Override |
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82 protected void reset() { |
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83 } |
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84 |
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85 |
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86 @Override |
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87 protected void finish() { |
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88 if (columns != null && current != null) { |
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89 // TODO figure out if its needed, as the columns |
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90 // are registered at their construction time. |
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91 for (ImportWstColumn col: columns) { |
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92 // TODO place a current.addColumn(col); here? |
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93 } |
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94 |
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95 differences.add(current); |
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96 } |
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97 |
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98 current = null; |
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99 columns = null; |
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100 } |
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101 |
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102 |
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103 @Override |
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104 protected void handleLine(int lineNum, String line) { |
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105 if (line.startsWith(START_META_CHAR)) { |
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106 handleMetaLine(stripMetaLine(line)); |
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107 } |
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108 else { |
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109 handleDataLine(line); |
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110 } |
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111 } |
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112 |
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113 |
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114 private void handleMetaLine(String meta) { |
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115 if (handleMetaUnit(meta)) { |
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116 return; |
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117 } |
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118 else { |
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119 handleMetaColumnNames(meta); |
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120 } |
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121 } |
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122 |
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123 |
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124 private boolean handleMetaUnit(String meta) { |
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125 Matcher m = META_UNIT.matcher(meta); |
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126 |
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127 if (m.matches()) { |
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128 String unit = m.group(1); |
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129 log.debug("Found unit: '" + unit + "'"); |
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130 |
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131 current.setUnit(new ImportUnit(unit)); |
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132 |
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133 return true; |
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134 } |
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135 |
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136 return false; |
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137 } |
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138 |
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139 |
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140 private boolean handleMetaColumnNames(String meta) { |
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141 Pattern META_COLUMN_NAMES = Pattern.compile("Fluss-km;(.*)"); |
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142 Matcher m = META_COLUMN_NAMES.matcher(meta); |
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143 |
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144 if (m.matches()) { |
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145 String colStr = m.group(1); |
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146 String[] cols = colStr.split(SEPERATOR_CHAR); |
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147 |
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148 log.debug("Found " + cols.length + " columns."); |
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149 |
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150 initColumns(cols); |
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151 |
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152 return true; |
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153 } |
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154 |
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155 return false; |
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156 } |
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157 |
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158 |
6286 | 159 /** Setup column structures with name, description and time interval. */ |
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160 private void initColumns(String[] cols) { |
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161 current.setNumberColumns(cols.length); |
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162 columns = current.getColumns().toArray(new ImportWstColumn[cols.length]); |
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163 |
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164 for (int i = 0; i < cols.length; i++) { |
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165 String name = cols[i].replace("\"", ""); |
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166 |
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167 log.debug("Create new column '" + name + "'"); |
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168 ImportWstColumn column = current.getColumn(i); |
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169 column.setName(name); |
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170 column.setDescription(name); |
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171 |
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172 Matcher m = YEARS_IN_COLUMN.matcher(name); |
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173 |
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174 if (m.matches()) { |
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175 int startYear = Integer.parseInt(m.group(1)); |
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176 int endYear = Integer.parseInt(m.group(2)); |
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177 ImportTimeInterval time = new ImportTimeInterval( |
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178 getStartDateFromYear(startYear), |
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179 getEndDateFromYear(endYear) |
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180 ); |
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181 column.setTimeInterval(time); |
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182 } else { |
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183 log.debug("No time interval in column header found: " + name); |
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184 } |
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185 } |
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186 } |
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187 |
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188 |
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189 private void handleDataLine(String line) { |
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190 String[] cols = line.split(SEPERATOR_CHAR); |
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191 |
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192 if (cols == null || cols.length < 2) { |
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193 log.warn("skip invalid waterlevel-diff line: '" + line + "'"); |
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194 return; |
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195 } |
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196 |
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197 try { |
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198 Double station = nf.parse(cols[0]).doubleValue(); |
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199 |
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200 for (int i = 0; i < columns.length; i++) { |
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201 int idx = i+1; |
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202 |
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203 if (idx >= cols.length) { |
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204 log.warn("Insufficient column numbers: " + line); |
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205 continue; |
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206 } |
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207 |
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208 String value = cols[idx]; |
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209 |
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210 try { |
5233
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211 columns[i].addColumnValue( |
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212 new BigDecimal(station), |
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213 new BigDecimal(nf.parse(value).doubleValue())); |
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214 } |
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215 catch (ParseException pe) { |
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216 log.warn("Could not parse value: '" + value + "'"); |
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217 } |
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218 } |
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219 } |
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220 catch (ParseException pe) { |
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221 log.warn("Could not parse station: '" + line + "'"); |
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222 } |
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223 } |
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224 } |
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225 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |