Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/parsers/WaterlevelDifferencesParser.java @ 5264:731030b69c7e

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Fix Waterlevel*-Parser to correctly register the wst-columns.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 13 Mar 2013 10:06:26 +0100
parents 93d4145d5740
children b3dd14fc13a6
rev   line source
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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.math.BigDecimal;
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6 import java.text.NumberFormat;
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7 import java.text.ParseException;
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8 import java.util.ArrayList;
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9 import java.util.List;
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10 import java.util.regex.Matcher;
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11 import java.util.regex.Pattern;
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12
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13 import org.apache.log4j.Logger;
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14
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15 import de.intevation.flys.importer.ImportUnit;
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16
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17 import de.intevation.flys.importer.ImportWst;
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18 import de.intevation.flys.importer.ImportWstColumn;
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19
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20
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21 /**
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22 * Parse WaterlevelDifferences CSV file.
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23 */
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24 public class WaterlevelDifferencesParser extends LineParser {
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25
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26 private static final Logger log =
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27 Logger.getLogger(WaterlevelDifferencesParser.class);
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28
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29 private static final NumberFormat nf =
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30 NumberFormat.getInstance(DEFAULT_LOCALE);
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31
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32 public static final Pattern META_UNIT =
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33 Pattern.compile("^Einheit: \\[(.*)\\].*");
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34
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35 /** List of parsed differences as ImportWst s. */
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36 private List<ImportWst> differences;
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37
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38 private ImportWstColumn[] columns;
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39
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40 /** The currently processed dataset. */
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41 private ImportWst current;
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42
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43
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44 public WaterlevelDifferencesParser() {
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45 differences = new ArrayList<ImportWst>();
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46 }
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47
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48
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49 /** Get the differences as wst parsed so far. */
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50 public List<ImportWst> getDifferences() {
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51 return differences;
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52 }
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53
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54
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55 /**
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56 * Parse a csv waterleveldifferenceparser and create a ImportWst object
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57 * from it.
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58 */
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59 @Override
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60 public void parse(File file) throws IOException {
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61 current = new ImportWst(file.getName());
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62 current.setKind(7);
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63
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64 super.parse(file);
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65 }
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66
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67
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68 /** No rewind implemented. */
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69 @Override
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70 protected void reset() {
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71 }
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72
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73
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74 @Override
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75 protected void finish() {
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76 if (columns != null && current != null) {
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77 // TODO figure out if its needed, as the columns
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78 // are registered at their construction time.
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79 for (ImportWstColumn col: columns) {
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80 // TODO place a current.addColumn(col); here?
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81 }
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82
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83 differences.add(current);
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84 }
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85
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86 current = null;
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87 columns = null;
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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 handleLine(int lineNum, String line) {
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93 if (line.startsWith(START_META_CHAR)) {
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94 handleMetaLine(stripMetaLine(line));
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95 }
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96 else {
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97 handleDataLine(line);
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98 }
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99 }
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100
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101
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102 private void handleMetaLine(String meta) {
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103 if (handleMetaUnit(meta)) {
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104 return;
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105 }
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106 else {
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107 handleMetaColumnNames(meta);
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108 }
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109 }
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110
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111
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112 private boolean handleMetaUnit(String meta) {
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113 Matcher m = META_UNIT.matcher(meta);
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114
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115 if (m.matches()) {
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116 String unit = m.group(1);
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117 log.debug("Found unit: '" + unit + "'");
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118
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119 current.setUnit(new ImportUnit(unit));
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120
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121 return true;
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122 }
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123
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124 return false;
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125 }
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126
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127
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128 private boolean handleMetaColumnNames(String meta) {
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129 Pattern META_COLUMN_NAMES = Pattern.compile("Fluss-km;(.*)");
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130 Matcher m = META_COLUMN_NAMES.matcher(meta);
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131
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132 if (m.matches()) {
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133 String colStr = m.group(1);
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134 String[] cols = colStr.split(SEPERATOR_CHAR);
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135
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136 log.debug("Found " + cols.length + " columns.");
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137
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138 initColumns(cols);
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139
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140 return true;
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141 }
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142
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143 return false;
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144 }
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145
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146
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147 private void initColumns(String[] cols) {
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148 current.setNumberColumns(cols.length);
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149 columns = current.getColumns().toArray(new ImportWstColumn[cols.length]);
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150
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151 for (int i = 0; i < cols.length; i++) {
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152 String name = cols[i].replace("\"", "");
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153
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154 log.debug("Create new column '" + name + "'");
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155 current.getColumn(i).setName(name);
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156 current.getColumn(i).setDescription(name);
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157 }
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158 }
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159
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160
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161 private void handleDataLine(String line) {
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162 String[] cols = line.split(SEPERATOR_CHAR);
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163
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164 if (cols == null || cols.length < 2) {
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165 log.warn("skip invalid waterlevel-diff line: '" + line + "'");
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166 return;
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167 }
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168
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169 try {
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170 Double station = nf.parse(cols[0]).doubleValue();
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171
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172 for (int i = 0; i < columns.length; i++) {
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173 int idx = i+1;
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174
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175 if (idx >= cols.length) {
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176 log.warn("Insufficient column numbers: " + line);
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177 continue;
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178 }
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179
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180 String value = cols[idx];
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181
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182 try {
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183 columns[i].addColumnValue(
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184 new BigDecimal(station),
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185 new BigDecimal(nf.parse(value).doubleValue()));
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186 }
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187 catch (ParseException pe) {
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188 log.warn("Error while parsing value: '" + value + "'");
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189 }
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190 }
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191 }
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192 catch (ParseException pe) {
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193 log.warn("Error while parsing station: '" + line + "'");
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194 }
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195 }
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196 }
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197 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org