Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/AtFileParser.java @ 6745:bd437771ea00 double-precision
Sediment density parser: fetch year from metaline and parse
author | Tom Gottfried <tom.gottfried@intevation.de> |
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date | Fri, 02 Aug 2013 11:36:33 +0200 |
parents | 9c597ccda611 |
children | 82b8bfb47260 |
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.BufferedReader; |
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12 import java.io.File; |
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13 import java.io.FileInputStream; |
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14 import java.io.InputStreamReader; |
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15 import java.io.IOException; |
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16 import java.math.BigDecimal; |
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17 |
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18 import org.apache.log4j.Logger; |
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19 |
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20 import org.dive4elements.river.importer.ImportDischargeTable; |
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21 import org.dive4elements.river.importer.ImportDischargeTableValue; |
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22 |
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23 import java.util.regex.Pattern; |
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24 import java.util.regex.Matcher; |
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25 |
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26 import java.util.Date; |
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27 import java.util.Calendar; |
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28 |
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29 import org.dive4elements.river.importer.ImportTimeInterval; |
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30 |
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Cosemtics, doc.
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31 /** Parse *.at (Abflusstafeln?) files. */ |
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32 public class AtFileParser { |
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33 |
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34 public static final String ENCODING = "ISO-8859-1"; |
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35 |
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36 private static Logger logger = Logger.getLogger(AtFileParser.class); |
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37 |
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38 // regular expression from hell to find out time range |
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39 public static final Pattern DATE_LINE = Pattern.compile( |
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40 "^\\*\\s*Abflu[^t]+tafel?\\s*([^\\d]+)" + |
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41 "(\\d{1,2})?\\.?(\\d{1,2})?\\.?(\\d{2,4})\\s*(?:(?:bis)|-)?\\s*" + |
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42 "(?:(\\d{1,2})?\\.?(\\d{1,2})?\\.?(\\d{2,4}))?\\s*.*$"); |
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43 |
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44 public AtFileParser() { |
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45 } |
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46 |
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47 |
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48 public ImportDischargeTable parse(File file) throws IOException { |
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49 return parse(file, "", 0); |
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50 } |
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51 |
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52 public ImportDischargeTable parse( |
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53 File file, |
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54 String prefix, |
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55 int kind |
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56 ) |
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57 throws IOException { |
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58 |
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59 logger.info("parsing AT file: " + file); |
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60 |
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61 BufferedReader br = null; |
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62 |
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63 String line = null; |
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64 |
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65 boolean beginning = true; |
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66 |
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67 ImportDischargeTable dischargeTable = |
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68 new ImportDischargeTable(kind, prefix + file.getName()); |
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69 |
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70 Date from = null; |
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71 Date to = null; |
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72 |
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73 try { |
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74 br = new BufferedReader( |
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75 new InputStreamReader( |
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76 new FileInputStream(file), ENCODING)); |
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77 |
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78 while ((line = br.readLine()) != null) { |
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79 |
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80 String tmp = line.trim(); |
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81 |
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82 if (tmp.length() == 0) { |
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83 continue; |
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84 } |
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85 |
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86 Matcher m = DATE_LINE.matcher(tmp); |
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87 if (m.matches()) { |
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88 from = guessDate(m.group(2), m.group(3), m.group(4)); |
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89 to = guessDate(m.group(5), m.group(6), m.group(7)); |
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90 if (from == null) { |
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91 Date t = from; from = to; to = t; |
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92 } |
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93 continue; |
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94 } |
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95 |
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96 if (tmp.startsWith("#! name=")) { |
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97 // XXX Skip the name, because we don't know where to save |
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98 // it at the moment |
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99 |
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100 //String name = tmp.substring(8); |
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101 continue; |
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102 } |
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103 |
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104 if (tmp.startsWith("#") || tmp.startsWith("*")) { |
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105 continue; |
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106 } |
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107 |
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108 String[] splits = tmp.replace(',', '.').split("\\s+"); |
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109 |
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110 if ((splits.length < 2) || (splits.length > 11)) { |
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111 logger.warn("Found an invalid row in the AT file."); |
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112 continue; |
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113 } |
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114 |
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115 String strW = splits[0].trim(); |
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116 double W = Double.parseDouble(strW); |
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117 |
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118 /* shift is used to differenciate between lines with |
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119 * exactly 10 Qs and lines with less than 10 Qs. The shift |
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120 * is only modified when it is the first line. |
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121 */ |
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122 int shift = -1; |
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123 |
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124 if (splits.length != 11 && beginning) { |
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125 shift = 10 - splits.length; |
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126 } |
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127 |
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128 |
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129 for (int i = 1; i < splits.length; i++) { |
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130 double iW = W + shift + i; |
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131 double iQ = Double.parseDouble(splits[i].trim()); |
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132 |
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133 dischargeTable.addDischargeTableValue( |
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134 new ImportDischargeTableValue( |
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135 new BigDecimal(iQ), |
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136 new BigDecimal(iW))); |
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137 } |
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138 |
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139 beginning = false; |
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140 } |
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141 } |
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142 catch (NumberFormatException pe) { |
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143 logger.warn("AT: invalid number " + pe.getMessage()); |
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144 } |
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145 finally { |
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146 if (br != null) { |
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147 br.close(); |
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148 } |
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149 } |
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150 |
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151 if (from != null) { |
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152 if (to != null && from.compareTo(to) > 0) { |
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153 Date t = from; from = to; to = t; |
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154 } |
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155 logger.info("from: " + from + " to: " + to); |
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156 ImportTimeInterval interval = new ImportTimeInterval(from, to); |
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157 dischargeTable.setTimeInterval(interval); |
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158 } |
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159 |
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160 logger.info("Finished parsing AT file: " + file); |
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161 |
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162 return dischargeTable; |
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163 } |
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164 |
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165 public static Date guessDate(String day, String month, String year) { |
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166 // TODO evaluate whether DateGuesser class can do that. |
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167 if (day == null && month == null && year == null) { |
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168 return null; |
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169 } |
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170 |
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171 logger.debug("day: " + day + " month: " + month + " year: " + year); |
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172 |
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173 int dayI = 15; |
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174 if (day != null) { |
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175 try { |
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176 dayI = Integer.parseInt(day.trim()); |
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177 } |
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178 catch (NumberFormatException nfe) { |
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179 } |
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180 } |
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181 |
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182 int monthI = 6; |
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183 if (month != null) { |
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184 try { |
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185 monthI = Integer.parseInt(month.trim()); |
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186 } |
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187 catch (NumberFormatException nfe) { |
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188 } |
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189 } |
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190 |
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191 int yearI = 1900; |
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192 if (year != null) { |
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193 try { |
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194 yearI = Integer.parseInt(year.trim()); |
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195 if (yearI < 100) { |
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196 if (yearI < 20) { |
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197 yearI += 2000; |
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198 } |
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199 else { |
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200 yearI += 1900; |
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201 } |
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202 } |
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203 } |
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204 catch (NumberFormatException nfe) { |
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205 } |
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206 } |
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207 |
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208 Calendar cal = Calendar.getInstance(); |
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209 cal.set(yearI, monthI-1, dayI, 12, 0, 0); |
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210 long ms = cal.getTimeInMillis(); |
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211 cal.setTimeInMillis(ms - ms%1000); |
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212 return cal.getTime(); |
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213 } |
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214 |
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215 |
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216 /** Parse one or more files, (useful for debugging), */ |
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217 public static void main(String [] args) { |
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218 |
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219 AtFileParser parser = new AtFileParser(); |
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220 |
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221 try { |
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222 for (String arg: args) { |
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223 parser.parse(new File(arg)); |
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224 } |
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225 } catch(Exception e) { |
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226 logger.error("Exception caught " + e); |
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227 } |
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228 } |
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229 } |
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230 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |