Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/WaterlevelDifferencesParser.java @ 7927:07cc4cd9233e
Add new DateUtil class.
author | "Tom Gottfried <tom@intevation.de>" |
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date | Thu, 12 Jun 2014 12:21:55 +0200 |
parents | fc8d5b5f2c99 |
children | 3bb1c62ad732 |
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.ImportWstQRange; |
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28 import org.dive4elements.river.importer.ImportWstColumn; |
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29 import org.dive4elements.river.importer.ImportWstColumnValue; |
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30 import org.dive4elements.river.utils.DateUtil; |
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31 |
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32 |
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33 /** |
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34 * Parse WaterlevelDifferences CSV file. |
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35 */ |
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36 public class WaterlevelDifferencesParser extends LineParser { |
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37 |
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38 private static final Logger log = |
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39 Logger.getLogger(WaterlevelDifferencesParser.class); |
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40 |
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41 private static final NumberFormat nf = |
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42 NumberFormat.getInstance(DEFAULT_LOCALE); |
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43 |
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44 public static final Pattern META_UNIT = |
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45 Pattern.compile("^Einheit: \\[(.*)\\].*"); |
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46 |
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47 public static final Pattern YEARS_IN_COLUMN = |
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48 Pattern.compile(".*(\\d{4})-(\\d{4})$"); |
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49 |
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50 public static final double INTERVAL_GAP = 0.00001d; |
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51 |
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52 /** List of parsed differences as ImportWst s. */ |
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53 private List<ImportWst> differences; |
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54 |
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55 private ImportWstColumn[] columns; |
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56 |
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57 /** The currently processed dataset. */ |
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58 private ImportWst current; |
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59 |
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60 |
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61 public WaterlevelDifferencesParser() { |
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62 differences = new ArrayList<ImportWst>(); |
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63 } |
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64 |
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65 |
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66 /** Get the differences as wst parsed so far. */ |
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67 public List<ImportWst> getDifferences() { |
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68 return differences; |
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69 } |
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70 |
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71 |
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72 /** |
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73 * Parse a csv waterleveldifferenceparser and create a ImportWst object |
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74 * from it. |
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75 */ |
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76 @Override |
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77 public void parse(File file) throws IOException { |
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78 current = new ImportWst(file.getName()); |
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79 current.setKind(6); |
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80 |
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81 super.parse(file); |
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82 } |
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83 |
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84 |
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85 /** No rewind implemented. */ |
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86 @Override |
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87 protected void reset() { |
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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 finish() { |
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93 if (columns != null && current != null) { |
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94 // TODO figure out if its needed, as the columns |
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95 // are registered at their construction time. |
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96 for (ImportWstColumn col: columns) { |
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97 // TODO place a current.addColumn(col); here? |
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98 } |
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99 |
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100 differences.add(current); |
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101 } |
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102 |
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103 // For all differences columns, add a single Q-Range with |
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104 // -1. |
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105 // Expand range to minimal length in case it would be 0 |
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106 // TODO: should otherwise be extended to |
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107 // (first station of next range - INTERVAL_GAP), |
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108 // assuming always ascending stations |
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109 for (ImportWstColumn column: columns) { |
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110 List<ImportWstColumnValue> cValues = column.getColumnValues(); |
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111 BigDecimal a = cValues.get(0).getPosition(); |
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112 BigDecimal b = cValues.get(cValues.size() - 1).getPosition(); |
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113 if (a.compareTo(b) == 0) { |
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114 b = new BigDecimal(b.doubleValue() + INTERVAL_GAP); |
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115 } |
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116 column.addColumnQRange( |
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117 new ImportWstQRange( |
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118 a, |
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119 b, |
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120 new BigDecimal(-1d)) |
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121 ); |
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122 } |
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123 current = null; |
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124 columns = null; |
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125 } |
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126 |
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127 |
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128 @Override |
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129 protected void handleLine(int lineNum, String line) { |
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130 if (line.startsWith(START_META_CHAR)) { |
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131 handleMetaLine(stripMetaLine(line)); |
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132 } |
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133 else { |
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134 handleDataLine(line); |
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135 } |
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136 } |
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137 |
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138 |
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139 private void handleMetaLine(String meta) { |
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140 if (handleMetaUnit(meta)) { |
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141 return; |
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142 } |
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143 else { |
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144 handleMetaColumnNames(meta); |
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145 } |
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146 } |
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147 |
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148 |
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149 private boolean handleMetaUnit(String meta) { |
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150 Matcher m = META_UNIT.matcher(meta); |
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151 |
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152 if (m.matches()) { |
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153 String unit = m.group(1); |
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154 log.debug("Found unit: '" + unit + "'"); |
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155 |
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156 current.setUnit(new ImportUnit(unit)); |
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157 |
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158 return true; |
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159 } |
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160 |
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161 return false; |
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162 } |
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163 |
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164 |
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165 private boolean handleMetaColumnNames(String meta) { |
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166 Pattern META_COLUMN_NAMES = Pattern.compile("Fluss-km;(.*)"); |
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167 Matcher m = META_COLUMN_NAMES.matcher(meta); |
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168 |
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169 if (m.matches()) { |
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170 String colStr = m.group(1); |
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171 String[] cols = colStr.split(SEPERATOR_CHAR); |
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172 |
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173 log.debug("Found " + cols.length + " columns."); |
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174 |
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175 initColumns(cols); |
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176 |
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177 return true; |
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178 } |
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179 |
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180 return false; |
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181 } |
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182 |
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183 |
6286 | 184 /** Setup column structures with name, description and time interval. */ |
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185 private void initColumns(String[] cols) { |
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186 current.setNumberColumns(cols.length); |
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187 columns = current.getColumns().toArray(new ImportWstColumn[cols.length]); |
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188 |
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189 for (int i = 0; i < cols.length; i++) { |
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190 String name = cols[i].replace("\"", ""); |
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191 |
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192 log.debug("Create new column '" + name + "'"); |
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193 ImportWstColumn column = current.getColumn(i); |
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194 column.setName(name); |
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195 column.setDescription(name); |
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196 |
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197 Matcher m = YEARS_IN_COLUMN.matcher(name); |
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198 |
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199 if (m.matches()) { |
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200 int startYear = Integer.parseInt(m.group(1)); |
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201 int endYear = Integer.parseInt(m.group(2)); |
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202 ImportTimeInterval time = new ImportTimeInterval( |
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203 DateUtil.getStartDateFromYear(startYear), |
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204 DateUtil.getEndDateFromYear(endYear) |
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205 ); |
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206 column.setTimeInterval(time); |
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207 } else { |
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208 log.debug("No time interval in column header found: " + name); |
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209 } |
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210 } |
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211 } |
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212 |
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213 |
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214 /** Handle one line of data, add one value for all columns. |
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215 * @param line the line to parse |
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216 */ |
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217 private void handleDataLine(String line) { |
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218 // Split by separator, do not exclude trailing empty string. |
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219 String[] cols = line.split(SEPERATOR_CHAR, -1); |
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220 |
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221 if (cols == null || cols.length < 2) { |
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222 log.warn("skip invalid waterlevel-diff line: '" + line + "'"); |
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223 return; |
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224 } |
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225 |
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226 try { |
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227 // The first value in a line like 12,9;4,3;4,5 is the station, later |
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228 // real values. |
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229 Double station = nf.parse(cols[0]).doubleValue(); |
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230 |
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231 for (int i = 0; i < columns.length; i++) { |
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232 int idx = i+1; |
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233 |
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234 if (idx >= cols.length) { |
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235 log.warn("Insufficient column numbers: " + line); |
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236 continue; |
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237 } |
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238 |
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239 String value = cols[idx]; |
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240 |
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241 if (value != null && !value.equals("")) { |
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242 try { |
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243 columns[i].addColumnValue( |
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244 new BigDecimal(station), |
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245 new BigDecimal(nf.parse(value).doubleValue())); |
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246 } |
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247 catch (ParseException pe) { |
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248 log.warn("Could not parse value: '" + value + "'"); |
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249 } |
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250 } |
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251 } |
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252 } |
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253 catch (ParseException pe) { |
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254 log.warn("Could not parse station: '" + line + "'"); |
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255 } |
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256 } |
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257 } |
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258 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |