Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/parsers/WaterlevelDifferencesParser.java @ 4193:f63b39799d2d

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Adapted DB schema (added relation measurement_station); improved importer to read files from filesystem with measurement stations.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 22 Oct 2012 09:02:26 +0200
parents aed7aba93718
children 016616df35dc
rev   line source
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a1402c16152f Added a parser and importer classes used to import waterlevel differences.
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1 package de.intevation.flys.importer.parsers;
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2
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3 import java.io.File;
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4 import java.io.IOException;
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5 import java.text.NumberFormat;
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6 import java.text.ParseException;
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7 import java.util.ArrayList;
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8 import java.util.List;
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9 import java.util.regex.Matcher;
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10 import java.util.regex.Pattern;
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11
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12 import org.apache.log4j.Logger;
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13
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14 import de.intevation.flys.importer.ImportUnit;
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15 import de.intevation.flys.importer.ImportWaterlevelDifference;
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16 import de.intevation.flys.importer.ImportWaterlevelDifferenceColumn;
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17 import de.intevation.flys.importer.ImportWaterlevelDifferenceValue;
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18
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19
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20 public class WaterlevelDifferencesParser extends LineParser {
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21
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22 private static final Logger log =
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23 Logger.getLogger(WaterlevelDifferencesParser.class);
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24
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25 private static final NumberFormat nf =
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26 NumberFormat.getInstance(DEFAULT_LOCALE);
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27
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28 public static final Pattern META_UNIT =
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29 Pattern.compile("^Einheit: \\[(.*)\\].*");
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30
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31
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32 private List<ImportWaterlevelDifference> differences;
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33
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34 private ImportWaterlevelDifferenceColumn[] columns;
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35
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36 private ImportWaterlevelDifference current;
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37
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38
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39 public WaterlevelDifferencesParser() {
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40 differences = new ArrayList<ImportWaterlevelDifference>();
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41 }
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42
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43
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44 public List<ImportWaterlevelDifference> getDifferences() {
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45 return differences;
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46 }
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47
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48
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49 @Override
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50 public void parse(File file) throws IOException {
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51 current = new ImportWaterlevelDifference(file.getName());
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52
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53 super.parse(file);
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54 }
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55
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56
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57 @Override
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58 protected void reset() {
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59 }
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60
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61
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62 @Override
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63 protected void finish() {
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64 if (columns != null && current != null) {
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65 for (ImportWaterlevelDifferenceColumn col: columns) {
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66 current.addValue(col);
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67 }
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68
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69 differences.add(current);
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70 }
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71
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72 current = null;
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73 columns = null;
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74 }
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75
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76 @Override
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77 protected void handleLine(int lineNum, String line) {
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78 if (line.startsWith(START_META_CHAR)) {
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79 handleMetaLine(stripMetaLine(line));
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80 }
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81 else {
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82 handleDataLine(line);
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83 }
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84 }
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85
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86
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87 private void handleMetaLine(String meta) {
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88 if (handleMetaUnit(meta)) {
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89 return;
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90 }
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91 else {
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92 handleMetaColumnNames(meta);
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93 }
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94 }
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95
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96
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97 private boolean handleMetaUnit(String meta) {
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98 Matcher m = META_UNIT.matcher(meta);
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99
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100 if (m.matches()) {
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101 String unit = m.group(1);
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102 log.debug("Found unit: '" + unit + "'");
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103
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104 current.setUnit(new ImportUnit(unit));
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105
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106 return true;
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107 }
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108
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109 return false;
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110 }
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111
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112
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113 private boolean handleMetaColumnNames(String meta) {
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114 Pattern META_COLUMN_NAMES = Pattern.compile("Fluss-km;(.*)");
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115 Matcher m = META_COLUMN_NAMES.matcher(meta);
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116
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117 if (m.matches()) {
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118 String colStr = m.group(1);
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119 String[] cols = colStr.split(SEPERATOR_CHAR);
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120
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121 log.debug("Found " + cols.length + " columns.");
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122
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123 initColumns(cols);
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124
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125 return true;
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126 }
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127
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128 return false;
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129 }
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130
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131
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132 private void initColumns(String[] cols) {
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133 columns = new ImportWaterlevelDifferenceColumn[cols.length];
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134
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135 for (int i = 0; i < cols.length; i++) {
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136 String name = cols[i].replace("\"", "");
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137
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138 log.debug("Create new column '" + name + "'");
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139 columns[i] = new ImportWaterlevelDifferenceColumn(name);
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140 }
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141 }
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142
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143
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144 private void handleDataLine(String line) {
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145 String[] cols = line.split(SEPERATOR_CHAR);
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146
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147 if (cols == null || cols.length < 2) {
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148 log.warn("skip invalid waterlevel line: '" + line + "'");
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149 return;
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150 }
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151
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152 try {
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153 Double station = nf.parse(cols[0]).doubleValue();
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154
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155 for (int i = 0; i < columns.length; i++) {
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156 int idx = i+1;
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157
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158 if (idx >= cols.length) {
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159 log.warn("Insufficient column numbers: " + line);
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160 continue;
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161 }
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162
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163 String value = cols[idx];
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164
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165 try {
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166 columns[i].addValue(new ImportWaterlevelDifferenceValue(
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167 station,
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168 nf.parse(value).doubleValue()
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169 ));
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170 }
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171 catch (ParseException pe) {
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172 log.warn("Error while parsing value: '" + value + "'");
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173 }
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174 }
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175 }
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176 catch (ParseException pe) {
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177 log.warn("Error while parsing station: '" + line + "'");
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178 }
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179 }
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180 }
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181 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org