Mercurial > dive4elements > river

annotate flys-backend/src/main/java/de/intevation/flys/importer/parsers/W80Parser.java @ 4760:69bb2996ed19

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W80Parser: Doc.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Fri, 04 Jan 2013 11:11:24 +0100
parents 35f4ece9562e
children ab87408bb0d3
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 de.intevation.artifacts.common.utils.FileTools;
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4
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5 import de.intevation.flys.importer.XY;
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6
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7 import de.intevation.flys.utils.EpsilonComparator;
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8 import de.intevation.flys.importer.parsers.tim.Coordinate;
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94b39073f0f7 Moved EpsilonComparator to utils package becaus its not only useful for TIM parsing. Used EpsilonComparator in DA60 and DA66 case. Maybe TODO: Use in PRF, too.
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10 import java.io.File;
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11 import java.io.IOException;
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12
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13 import java.util.ArrayList;
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14 import java.util.List;
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15 import java.util.Map;
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16 import java.util.TreeMap;
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17
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18 import java.util.regex.Pattern;
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19
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20 import org.apache.log4j.Logger;
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21
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22
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23 /**
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24 * To create cross-sections, generate: Map<double,list<xy>> from files
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25 * in w80 format.
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26 */
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27 public class W80Parser extends LineParser implements CrossSectionParser
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28 {
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29 /** Private logger. */
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30 private static Logger logger = Logger.getLogger(W80Parser.class);
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31
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32
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33 /** The current line to which add points. */
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34 private List<XY> currentLine;
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35
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36
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37 /** Data collected so far, last element will be currentLine. */
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38 protected Map<Double, List<XY>> data;
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39
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40
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41 /** Anchor to project to. */
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42 private class Anchor {
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43 private Coordinate coordinate;
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44 private double station;
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45 public Anchor(Coordinate anchor, double station) {
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46 this.coordinate = anchor;
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47 this.station = station;
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48 }
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49 public double getStation() {
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50 return station;
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51 }
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52 public Coordinate getCoordinate() {
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53 return coordinate;
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54 }
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55 }
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56
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57
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58 /** Reference point for simple projection. */
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59 private Anchor anchor;
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60
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61
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62 /** Trivial constructor. */
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63 public W80Parser() {
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94b39073f0f7 Moved EpsilonComparator to utils package becaus its not only useful for TIM parsing. Used EpsilonComparator in DA60 and DA66 case. Maybe TODO: Use in PRF, too.
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64 data = new TreeMap<Double, List<XY>>(EpsilonComparator.CMP);
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65 }
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66
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67
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68 /** Get the description of the cross section parsed. */
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69 @Override
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70 public String getDescription() {
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71 return FileTools.removeExtension(getFileName());
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72 }
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73
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74
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75 /** Get the year of this cross sections measurement. */
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76 @Override
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77 public Integer getYear() {
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78 return null;
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79 }
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80
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81
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82 /**
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83 * Return the data parsed.
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84 * @return map of stations (km) to list of points.
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85 */
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86 @Override
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87 public Map<Double, List<XY>> getData() {
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88 return data;
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89 }
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90
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91
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92 public void parseW80s(File root, final Callback callback) {
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93
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94 // TODO use the removeExtension/guess description and date.
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95 FileTools.walkTree(root, new FileTools.FileVisitor() {
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96 @Override
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97 public boolean visit(File file) {
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98 if (file.isFile() && file.canRead()
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99 && file.getName().toLowerCase().endsWith(".w80")
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100 && (callback == null || callback.accept(file))) {
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101 reset();
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102 try {
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103 parse(file);
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104 logger.info("parsing done");
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105 if (callback != null) {
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106 callback.parsed(W80Parser.this);
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107 }
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108 }
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109 catch (IOException ioe) {
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110 logger.error("IOException while parsing file");
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111 return false;
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112 }
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113 }
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114 return true;
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115 }
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116 });
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117 }
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118
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119
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120 /** Called before consuming first line of file. */
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121 public void reset() {
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122 data.clear();
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123 currentLine = new ArrayList<XY>();
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124 anchor = null;
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125 }
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126
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127
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128 /**
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129 * Get the Index of the last cross-section lines point.
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130 * @return last points index, -1 if not available.
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131 */
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132 private int lastPointIdx() {
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133 if (currentLine == null || currentLine.isEmpty()) {
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134 return -1;
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135 }
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136 XY lastPoint = this.currentLine.get(currentLine.size()-1);
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137 return lastPoint.getIndex();
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138 }
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139
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140
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141 /**
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142 * Add a Point (YZ,Index) to the current cross section line.
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143 * @param y The y coordinate of new point.
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144 * @param z The z coordinate of new point.
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145 * @param idx Ignored, the parameter of new point.
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146 * @return true if point could been added, false otherwise (e.g. not
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147 * parsable y or z values.
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148 */
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149 private boolean addPoint(double gkr, double gkh, double height, String idx) {
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150 // Calculate distance between this and anchor-point.
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151 double dx = gkr - anchor.getCoordinate().getX();
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152 double dy = gkh - anchor.getCoordinate().getY();
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153 double d = Math.sqrt(dx * dx + dy * dy);
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154
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155 // TODO: Scale to have "x==0" e.g. at axis of river.
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156 // TODO: Handle "not straight lines."
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157
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158 // We ignore idx, and increment instead.
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159 int index;
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160 int lastPointIdx = lastPointIdx();
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161 if (lastPointIdx <= 0) {
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162 index = 1;
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163 } else {
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164 index = lastPointIdx + 1;
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165 }
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166
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167 currentLine.add(new XY(d, height/1000d, index));
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168 return true;
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169 }
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170
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171
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172 /**
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173 * Called for each line. Try to extract info from a w80 line.
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174 */
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175 @Override
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176 protected void handleLine(int lineNum, String line) {
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177 // The 'shore' field shows which side of the river the shore is measured.
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178 // Therefore, the points have to be added in the correct order (also
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179 // because later distances are calculated which cannot be
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180 // negative.
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181 String pointId = line.substring(0,20);
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182 String station = line.substring(9,15);
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183 String shore = line.substring(15,17);
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184 // TODO: There is 'station' and a 'shore'-code behind.
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185 // 1 = left, 2 = right. none = middle
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186 String pointIndex = line.substring(17,21);
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187 // For GK, first seven digits are of interest.
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188 String gkRight = line.substring(20,30);
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189 String gkHigh = line.substring(30,40);
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190 String date = line.substring(40,46);
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191 /* Fields not (yet?) of interest for FLYS
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192 String locType = line.substring(46,47);
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193 */
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194 String height = line.substring(47,54);
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195 String dateH = line.substring(54,60);
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196 /* Fields not (yet?) of interest for FLYS
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197 String typeH = line.substring(60,61);
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198 String kindH = line.substring(61,64);
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199 */
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200 String dateDec = line.substring(64,70);
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201 /* Fields not (yet?) of interest for FLYS
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202 String note = line.substring(70,78);
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203 String actual = line.substring(78);
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204 */
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205
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206 double stationKm = Double.parseDouble(station) / 1000d;
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207 double gkRightKm = Double.parseDouble(gkRight.substring(0,7));
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208 double gkHighKm = Double.parseDouble(gkHigh.substring(0,7));
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209 double heightM = Double.parseDouble(height);
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210
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211 // New (or first) line.
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212 if (anchor == null || anchor.getStation() != stationKm) {
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213 this.anchor = new Anchor(new Coordinate(gkRightKm, gkHighKm, heightM), stationKm);
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214 currentLine = new ArrayList<XY>();
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215 data.put(stationKm, currentLine);
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216 currentLine.add(new XY(0d, heightM,0));
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217 }
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218 else {
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219 addPoint(gkRightKm, gkHighKm, heightM, pointIndex);
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220 }
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221 }
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222
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223
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224 /** Called when file is fully consumed. */
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225 @Override
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226 protected void finish() {
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227 logger.info("Parsed " + data.size() + " lines");
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228 }
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229
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230
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diff changeset
231 /** Parses files given as arguments. */
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232 public static void main(String [] args) {
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233
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234 W80Parser parser = new W80Parser();
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235
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236 logger.warn("Start parsing files.");
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237 for (String arg: args) {
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238 parser.parseW80s(new File(arg), null);
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diff changeset
239 logger.warn("Parsing a file.");
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240 }
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diff changeset
241 logger.error("Finished parsing files.");
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242 }
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243 }
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diff changeset
244 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org