Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/importer/parsers/StaFileParser.java @ 6328:53d08f33d094

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Backend: Moved guessing of main values and there time intervals out of the STA parser. Same come will be useful to extend the WST parser to better handle official lines.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 13 Jun 2013 17:15:34 +0200
parents ec54bb4fe407
children b58a71a5720c
rev   line source
5844
4dd33b86dc61 Added header to river backend.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
diff changeset
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.io.LineNumberReader;
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14 import java.io.FileInputStream;
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15 import java.io.InputStreamReader;
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16
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17 import java.math.BigDecimal;
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18
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19 import java.util.regex.Pattern;
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20 import java.util.regex.Matcher;
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21
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22 import java.util.HashMap;
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23 import java.util.ArrayList;
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24
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25 import org.apache.log4j.Logger;
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26
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27 import org.dive4elements.river.importer.ImportMainValueType;
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28 import org.dive4elements.river.importer.ImportMainValue;
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29 import org.dive4elements.river.importer.ImportNamedMainValue;
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30 import org.dive4elements.river.importer.ImportGauge;
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31
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32 public class StaFileParser
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33 {
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34 private static Logger log = Logger.getLogger(StaFileParser.class);
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35
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36 public static final String ENCODING = "ISO-8859-1";
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37
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38 public static final String TYPES =
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39 System.getProperty("flys.backend.main.value.types", "QWTD");
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40
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41 public static final Pattern QWTD_ =
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42 Pattern.compile("\\s*([^\\s]+)\\s+([^\\s]+)\\s+([" +
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43 Pattern.quote(TYPES) + "]).*");
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44
5735
c75be5205a69 Backend: Parse time intervals for main values.
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45
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46 public StaFileParser() {
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47 }
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48
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49 public boolean parse(ImportGauge gauge) throws IOException {
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50
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51 File file = gauge.getStaFile();
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52
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53 log.info("parsing STA file: " + file);
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54 LineNumberReader in = null;
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55 try {
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56 in =
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57 new LineNumberReader(
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58 new InputStreamReader(
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59 new FileInputStream(file), ENCODING));
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60
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61 String line = in.readLine();
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62
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63 if (line == null) {
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64 log.warn("STA file is empty.");
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65 return false;
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66 }
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67
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68 if (line.length() < 37) {
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69 log.warn("First line in STA file is too short.");
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70 return false;
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71 }
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72
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73 String gaugeName = line.substring(16, 35).trim();
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74
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75 Long gaugeNumber = null;
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76
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ec54bb4fe407 Importer: use gauge official number as identifier, not name
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77 String gaugeNumberString = line.substring(8, 16).trim();
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78
6004
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79 try {
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80 gaugeNumber = Long.parseLong(gaugeNumberString);
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81 }
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82 catch (NumberFormatException nfe) {
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83 log.warn("STA: gauge number '" + gaugeNumberString +
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84 "' is not a valid long number.");
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85 }
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86
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87 gauge.setName(gaugeName);
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88 gauge.setOfficialNumber(gaugeNumber);
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89
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90 if (log.isDebugEnabled()) {
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91 log.debug(
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92 "name/number: '" + gaugeName + "' '" + gaugeNumber + "'");
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93 }
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94
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95 String [] values = line.substring(38).trim().split("\\s+", 2);
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96
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97 if (values.length < 2) {
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98 log.warn("STA: Not enough columns for aeo and datum.");
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99 }
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100 try {
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101 gauge.setAeo(new BigDecimal(values[0].replace(",", ".")));
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102 gauge.setDatum(new BigDecimal(values[1].replace(",", ".")));
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103 }
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104 catch (NumberFormatException nfe) {
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105 log.warn("STA: cannot parse aeo or datum.");
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106 return false;
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107 }
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108
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109 line = in.readLine();
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110
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111 if (line == null) {
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112 log.warn("STA file has not enough lines");
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113 return false;
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114 }
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115
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116 if (line.length() < 36) {
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117 log.warn("STA: second line is too short");
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118 return false;
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119 }
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120
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121 try {
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122 gauge.setStation(
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123 new BigDecimal(line.substring(29, 36).trim()));
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124 }
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125 catch (NumberFormatException nfe) {
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126 log.warn("STA: parsing of the datum of the gauge failed");
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127 return false;
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128 }
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129
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130 // overread the next six lines
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131 for (int i = 0; i < 6; ++i) {
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132 if ((line = in.readLine()) == null) {
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133 log.warn("STA file is too short");
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134 return false;
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135 }
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136 }
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137
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138 HashMap<String, ImportMainValueType> types =
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139 new HashMap<String, ImportMainValueType>();
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140
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141 ArrayList<ImportNamedMainValue> namedMainValues =
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142 new ArrayList<ImportNamedMainValue>();
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143
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144 ArrayList<ImportMainValue> mainValues =
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145 new ArrayList<ImportMainValue>();
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146
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147 while ((line = in.readLine()) != null) {
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148 Matcher m = QWTD_.matcher(line);
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149 if (m.matches()) {
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150 BigDecimal value;
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151 try {
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152 value = new BigDecimal(m.group(2).replace(",", "."));
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153 }
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154 catch (NumberFormatException nfe) {
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155 log.warn("STA: value not parseable in line "
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156 + in.getLineNumber());
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157 continue;
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158 }
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159 String typeString = m.group(3);
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160 log.debug("\t type: " + typeString);
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161 ImportMainValueType type = types.get(typeString);
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162 if (type == null) {
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163 type = new ImportMainValueType(typeString);
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164 types.put(typeString, type);
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165 }
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166 String name = m.group(1);
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167 NameAndTimeInterval nat =
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168 NameAndTimeInterval.parseName(name);
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169 ImportNamedMainValue namedMainValue =
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170 new ImportNamedMainValue(type, nat.getName());
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171 namedMainValues.add(namedMainValue);
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172
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173 ImportMainValue mainValue = new ImportMainValue(
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174 gauge,
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175 namedMainValue,
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176 value,
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177 nat.getTimeInterval());
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178
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179 mainValues.add(mainValue);
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180 }
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181 else {
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182 // TODO: treat as a comment
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183 }
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184 }
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185 gauge.setMainValueTypes(
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186 new ArrayList<ImportMainValueType>(types.values()));
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187 gauge.setNamedMainValues(namedMainValues);
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188 gauge.setMainValues(mainValues);
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189 }
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190 finally {
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191 if (in != null) {
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192 in.close();
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193 }
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194 }
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195 log.info("finished parsing STA file: " + file);
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196 return true;
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197 }
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198
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199 }
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200 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org