Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/W80CSVParser.java @ 5856:c7b6561af370
it's worth more than a warning if the import is likely to fail
author | Tom Gottfried <tom.gottfried@intevation.de> |
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date | Fri, 26 Apr 2013 19:12:13 +0200 |
parents | 4dd33b86dc61 |
children | 8ed9b1edace6 |
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 org.dive4elements.artifacts.common.utils.FileTools; |
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12 |
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13 import org.dive4elements.river.importer.XY; |
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14 |
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15 import org.dive4elements.river.importer.parsers.tim.Coordinate; |
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16 |
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17 import org.dive4elements.river.utils.DateGuesser; |
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18 import org.dive4elements.river.utils.EpsilonComparator; |
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19 |
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20 import java.io.File; |
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21 import java.io.IOException; |
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22 |
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23 import java.util.ArrayList; |
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24 import java.util.Calendar; |
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25 import java.util.Date; |
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26 import java.util.List; |
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27 import java.util.Map; |
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28 import java.util.TreeMap; |
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29 |
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30 import org.apache.log4j.Logger; |
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31 |
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32 |
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33 /** |
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34 * To create cross-sections, generate: Map<double,list<xy>> from files |
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35 * in w80/csv format. |
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36 */ |
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37 public class W80CSVParser extends LineParser implements CrossSectionParser |
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38 { |
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39 /** Private logger. */ |
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40 private static Logger logger = Logger.getLogger(W80CSVParser.class); |
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41 |
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42 |
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43 /** The current line to which add points. */ |
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44 private List<XY> currentLine; |
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45 |
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46 |
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47 /** Data collected so far, last element will be currentLine. */ |
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48 protected Map<Double, List<XY>> data; |
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49 |
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50 |
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51 /** Anchor to project to. */ |
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52 private static class Anchor extends Coordinate { |
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53 |
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54 private static final double EPSILON = 1e-5; |
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55 |
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56 private double station; |
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57 |
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58 public Anchor(double x, double y, double z, double station) { |
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59 super(x, y, z); |
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60 this.station = station; |
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61 } |
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62 |
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63 public boolean sameStation(double station) { |
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64 return Math.abs(this.station - station) < EPSILON; |
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65 } |
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66 } |
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67 |
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68 |
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69 /** Reference point for simple projection. */ |
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70 private Anchor anchor; |
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71 |
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72 |
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73 /** |
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74 * Reference point for distance calculations, introduced to |
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75 * deal with bends in the lines. |
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76 * Array has two entrys: first is GK-Right, second GK-High. |
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77 */ |
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78 private double[] lastPointGK; |
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79 |
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80 |
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81 /** Measurement date of anchor as listed in w80 file. */ |
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82 private Date anchorDate; |
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83 |
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84 |
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85 private double distanceToLastPoint(double gkr, double gkh) { |
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86 double dx = gkr - lastPointGK[0]; |
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87 double dy = gkh - lastPointGK[1]; |
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88 double d = dx*dx + dy*dy; |
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89 |
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90 return Math.sqrt(d); |
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91 } |
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92 |
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93 |
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94 /** Trivial constructor. */ |
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95 public W80CSVParser() { |
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96 data = new TreeMap<Double, List<XY>>(EpsilonComparator.CMP); |
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97 } |
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98 |
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99 |
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100 /** |
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101 * Get the description of the cross section parsed - |
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102 * directory name of current file. |
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103 */ |
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104 @Override |
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105 public String getDescription() { |
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106 return getInputFile().getParentFile().getName(); |
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107 } |
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108 |
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109 |
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110 /** Get the year of this cross sections measurement. */ |
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111 @Override |
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112 public Integer getYear() { |
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113 if (anchorDate == null) { |
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114 return null; |
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115 } |
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116 Calendar dateCalendar = Calendar.getInstance(); |
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117 dateCalendar.setTime(anchorDate); |
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118 return dateCalendar.get(Calendar.YEAR); |
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119 } |
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120 |
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121 |
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122 /** |
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123 * Return the data parsed. |
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124 * @return map of stations (km) to list of points. |
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125 */ |
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126 @Override |
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127 public Map<Double, List<XY>> getData() { |
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128 return data; |
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129 } |
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130 |
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131 |
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132 /** Recursively descend root, ask the callback for every file |
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133 * found and parse it if callback acks. When done, notify callback. */ |
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134 public void parseW80CSVs(File root, final Callback callback) { |
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135 |
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136 FileTools.walkTree(root, new FileTools.FileVisitor() { |
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137 @Override |
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138 public boolean visit(File file) { |
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139 if (file.isFile() && file.canRead() |
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140 && file.getName().toLowerCase().endsWith(".csv") |
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141 && (callback == null || callback.accept(file))) { |
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142 reset(); |
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143 try { |
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144 parse(file); |
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145 logger.info("parsing done"); |
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146 if (callback != null) { |
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147 callback.parsed(W80CSVParser.this); |
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148 } |
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149 } |
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150 catch (IOException ioe) { |
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151 logger.error("IOException while parsing file"); |
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152 return false; |
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153 } |
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154 } |
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155 return true; |
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156 } |
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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 /** Called before consuming first line of file. */ |
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162 public void reset() { |
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163 data.clear(); |
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164 currentLine = new ArrayList<XY>(); |
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165 anchor = null; |
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166 anchorDate = null; |
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167 lastPointGK = new double[] {0d,0d}; |
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168 } |
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169 |
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170 |
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171 /** |
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172 * Get the Index of the last cross-section lines point. |
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173 * @return last points index, -1 if not available. |
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174 */ |
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175 private int getLastPointIdx() { |
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176 if (currentLine == null || currentLine.isEmpty()) { |
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177 return -1; |
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178 } |
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179 XY lastPoint = this.currentLine.get(currentLine.size()-1); |
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180 return lastPoint.getIndex(); |
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181 } |
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182 |
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183 |
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184 private double getLastPointX() { |
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185 if (currentLine == null || currentLine.isEmpty()) { |
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186 return 0d; |
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187 } |
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188 XY lastPoint = this.currentLine.get(currentLine.size()-1); |
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189 return lastPoint.getX(); |
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190 } |
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191 |
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192 |
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193 /** |
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194 * Add a Point (YZ,Index) to the current cross section line. |
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195 * @param y The y coordinate of new point. |
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196 * @param z The z coordinate of new point. |
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197 * @param idx Ignored, the parameter of new point. |
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198 * @return true if point could been added, false otherwise (e.g. not |
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199 * parsable y or z values. |
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200 */ |
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201 private boolean addPoint(double gkr, double gkh, double height, String idx) { |
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202 // Calculate distance between this and lst point (add distances). |
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203 double d = distanceToLastPoint(gkr, gkh); |
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204 double totalX = getLastPointX() + d; |
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205 |
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206 // We ignore idx, and increment instead. |
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207 int index; |
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208 int lastPointIdx = getLastPointIdx(); |
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209 if (lastPointIdx <= 0) { |
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210 index = 1; |
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211 } else { |
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212 index = lastPointIdx + 1; |
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213 } |
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214 |
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215 this.lastPointGK[0] = gkr; |
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216 this.lastPointGK[1] = gkh; |
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217 currentLine.add(new XY(totalX, height/1000d, index)); |
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218 return true; |
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219 } |
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220 |
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221 // As per documentation: |
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222 // BW;WPA;ST;UF;PN;LS;BL-LS;Y;X;Z;DL;LZK;SY;SX;SZ;BML;HS;BL-HS;H;DH;HZK;SH;WVA;BMH;BMP;DST;DB;LDS;LKZ; |
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223 |
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224 |
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225 /** |
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226 * Called for each line. Try to extract info from a w80 line. |
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227 * @param lineNum Number of line (starting with 1). |
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228 */ |
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229 @Override |
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230 protected void handleLine(int lineNum, String line) { |
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231 // First two lines are 'comment'-like. |
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232 if (lineNum == 1 || lineNum == 2) { |
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233 return; |
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234 } |
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235 // The 'shore' field shows which side of the river the shore is measured. |
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236 // Therefore, the points have to be added in the correct order (also |
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237 // because later distances are calculated which cannot be |
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238 // negative. |
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239 String[] fields = line.split(";"); |
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240 String station = fields[2]; |
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241 String shore = fields[3]; |
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242 // TODO: There is 'station' and a 'shore'-code behind. |
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243 // 1 = left, 2 = right. none = middle |
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244 String pointIndex = line.substring(16,21); |
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245 // For GK, first seven digits are of interest. |
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246 String gkRight = fields[7]; |
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247 String gkHigh = fields[8]; |
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248 String date = fields[10]; |
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249 String height = fields[18]; |
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250 String dateH = line.substring(54,60); |
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251 String dateDec = line.substring(64,70); |
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252 |
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253 double stationKm = Double.parseDouble(station) / 1000d; |
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254 double gkRightKm = Double.parseDouble(gkRight.replace(",","."));//.substring(0,7)); |
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255 double gkHighKm = Double.parseDouble(gkHigh.replace(",","."));//.substring(0,7)); |
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256 double heightM = Double.parseDouble(height.replace(",",".")); |
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257 |
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258 // New (or first) line. |
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259 if (anchor == null || !anchor.sameStation(stationKm)) { |
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260 anchor = new Anchor(gkRightKm, gkHighKm, heightM, stationKm); |
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261 lastPointGK[0] = gkRightKm; |
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262 lastPointGK[1] = gkHighKm; |
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263 currentLine = new ArrayList<XY>(); |
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264 data.put(stationKm, currentLine); |
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265 currentLine.add(new XY(0d, heightM, 0)); |
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266 try { |
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267 anchorDate = DateGuesser.guessDate(date); |
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268 } |
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269 catch (IllegalArgumentException iae) { |
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270 logger.warn("W80CSV: Invalid date '" + date + "'."); |
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271 } |
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272 } |
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273 else { |
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274 addPoint(gkRightKm, gkHighKm, heightM, pointIndex); |
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275 } |
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276 } |
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277 |
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278 |
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279 /** Called when file is fully consumed. */ |
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280 @Override |
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281 protected void finish() { |
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282 logger.info("Parsed " + data.size() + " lines"); |
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283 } |
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284 |
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285 |
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286 /** Parses files given as arguments. */ |
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287 public static void main(String [] args) { |
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288 |
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289 W80CSVParser parser = new W80CSVParser(); |
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290 |
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291 logger.warn("Start parsing files."); |
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292 for (String arg: args) { |
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293 logger.warn("Parsing a file."); |
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294 parser.parseW80CSVs(new File(arg), null); |
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295 } |
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296 logger.error("Finished parsing files."); |
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297 } |
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298 } |
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299 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |