Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/PRFParser.java @ 6285:f55a99fe5ce3
Whitespace correction and cminor ruft code removal.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Wed, 12 Jun 2013 10:43:30 +0200 |
parents | e514cab94026 |
children | 3158f8f227bf |
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 java.util.Map; |
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12 import java.util.TreeMap; |
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13 import java.util.List; |
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14 import java.util.ArrayList; |
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15 import java.util.Collections; |
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16 |
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17 import java.util.regex.Pattern; |
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18 import java.util.regex.Matcher; |
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19 |
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20 import java.io.File; |
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21 import java.io.InputStreamReader; |
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22 import java.io.LineNumberReader; |
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23 import java.io.FileInputStream; |
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24 import java.io.IOException; |
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25 |
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26 import org.apache.log4j.Logger; |
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27 |
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28 import org.dive4elements.river.importer.XY; |
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29 |
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30 import org.dive4elements.artifacts.common.utils.FileTools; |
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31 |
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33 /** | |
34 * Parse files in .prf format and generate a mapping of double | |
35 * (km) to List of Points (XY). | |
36 */ | |
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37 public class PRFParser implements CrossSectionParser |
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38 { |
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39 private static Logger log = Logger.getLogger(PRFParser.class); |
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40 |
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41 public static final String ENCODING = |
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42 System.getProperty("flys.backend.prf.encoding", "ISO-8859-1"); |
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43 |
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44 public static final Pattern DATA_PATTERN = |
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45 Pattern.compile( |
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46 "\\((\\d+)x\\s*,\\s*(\\d+)\\(" + |
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47 "\\s*f(\\d+)\\.(\\d+)\\s*,\\s*f(\\d+)\\.(\\d+)\\s*\\)?\\)?"); |
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48 |
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49 public static final Pattern KM_PATTERN = |
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50 Pattern.compile("\\((\\d+)x\\s*,\\s*f(\\d+)\\.(\\d+)\\s*\\)?"); |
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51 |
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52 public static final Pattern YEAR_PATTERN = |
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53 Pattern.compile("(\\d{4})"); |
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54 |
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55 public static final int MIN_YEAR = 1800; |
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56 public static final int MAX_YEAR = 2100; |
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57 |
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58 public static class DataFormat { |
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59 |
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60 protected int deleteChars; |
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61 protected int maxRepetitions; |
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62 protected int firstIntegerPlaces; |
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63 protected int firstFractionPlaces; |
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64 protected int secondIntegerPlaces; |
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65 protected int secondFractionPlaces; |
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66 |
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67 protected double firstShift; |
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68 protected double secondShift; |
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69 |
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70 public DataFormat() { |
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71 } |
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72 |
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73 public DataFormat(Matcher m) { |
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74 deleteChars = Integer.parseInt(m.group(1)); |
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75 maxRepetitions = Integer.parseInt(m.group(2)); |
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76 firstIntegerPlaces = Integer.parseInt(m.group(3)); |
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77 firstFractionPlaces = Integer.parseInt(m.group(4)); |
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78 secondIntegerPlaces = Integer.parseInt(m.group(5)); |
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79 secondFractionPlaces = Integer.parseInt(m.group(6)); |
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80 |
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81 firstShift = Math.pow(10, firstFractionPlaces); |
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82 secondShift = Math.pow(10, secondFractionPlaces); |
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83 } |
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84 |
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85 /** |
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86 * @param kmData where data points will be added to. |
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87 * @param line Line to parse. |
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88 */ |
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89 public void extractData(String line, List<XY> kmData) { |
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90 int L = line.length(); |
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91 if (L <= deleteChars) { |
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92 return; |
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93 } |
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94 |
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95 int pos = deleteChars; |
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96 |
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97 boolean debug = log.isDebugEnabled(); |
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98 |
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99 // Repetitions are values per line ( ... 10.0 12.5 15.3 ... ) |
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100 int rep = 0; |
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101 for (;rep < maxRepetitions; ++rep) { |
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102 if (pos >= L || pos + firstIntegerPlaces >= L) { |
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103 break; |
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104 } |
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105 String first = line.substring( |
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106 pos, pos + firstIntegerPlaces); |
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107 |
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108 String second = line.substring( |
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109 pos + firstIntegerPlaces, |
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110 Math.min(L, pos + firstIntegerPlaces + secondIntegerPlaces)); |
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111 |
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112 double x, y; |
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113 try { |
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114 x = Double.parseDouble(first); |
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115 y = Double.parseDouble(second); |
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116 } |
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117 catch (NumberFormatException nfe) { |
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118 // "Dummy" line to separate datasets, or missing values. |
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119 log.debug("PRFParser: Broken line: " + line); |
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120 return; |
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121 } |
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122 |
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123 if (first.indexOf('.') < 0) { |
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124 x /= firstShift; |
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125 } |
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126 |
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127 if (firstFractionPlaces > 0) { |
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128 x = (int)(x*firstShift)/firstShift; |
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129 } |
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130 |
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131 if (second.indexOf('.') < 0) { |
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132 y /= secondShift; |
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133 } |
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134 |
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135 if (secondFractionPlaces > 0) { |
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136 y = (int)(y*secondShift)/secondShift; |
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137 } |
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138 |
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139 kmData.add(new XY(x, y, kmData.size())); |
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140 |
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141 pos += firstIntegerPlaces + secondIntegerPlaces; |
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142 } |
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143 |
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144 return; |
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145 } |
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146 } // class DataFormat |
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147 |
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148 public static class KMFormat { |
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149 |
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150 protected int deleteChars; |
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151 protected int integerPlaces; |
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152 protected int fractionPlaces; |
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153 |
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154 protected double shift; |
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155 |
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156 public KMFormat() { |
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157 } |
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158 |
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159 public KMFormat(Matcher m) { |
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160 deleteChars = Integer.parseInt(m.group(1)); |
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161 integerPlaces = Integer.parseInt(m.group(2)); |
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162 fractionPlaces = Integer.parseInt(m.group(3)); |
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163 |
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164 shift = Math.pow(10, fractionPlaces); |
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165 } |
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166 |
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167 public double extractKm(String line) throws NumberFormatException { |
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168 |
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169 if (line.length() <= deleteChars) { |
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170 throw new NumberFormatException("line too short"); |
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171 } |
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172 |
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173 String kmS = |
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174 line.substring(deleteChars, deleteChars+integerPlaces); |
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175 |
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176 double km = Double.parseDouble(kmS.trim()); |
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177 |
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178 if (kmS.indexOf('.') < 0) { |
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179 km /= shift; |
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180 } |
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181 |
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182 return fractionPlaces > 0 |
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183 ? ((int)(km*shift))/shift |
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184 : km; |
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185 } |
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186 } // class KMFormat |
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187 |
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188 /** Mapping stations (km) to measured points. */ |
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189 protected Map<Double, List<XY>> data; |
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190 |
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191 protected Integer year; |
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192 |
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193 protected String description; |
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194 |
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195 |
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196 public PRFParser() { |
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197 data = new TreeMap<Double, List<XY>>(); |
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198 } |
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199 |
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200 @Override |
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201 public Integer getYear() { |
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202 return year; |
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203 } |
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204 |
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205 public void setYear(Integer year) { |
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206 this.year = year; |
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207 } |
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208 |
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209 @Override |
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210 public String getDescription() { |
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211 return description; |
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212 } |
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213 |
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214 public void setDescription(String description) { |
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215 this.description = description; |
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216 } |
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217 |
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218 @Override |
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219 public Map<Double, List<XY>> getData() { |
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220 return data; |
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221 } |
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222 |
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223 public void setData(Map<Double, List<XY>> data) { |
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224 this.data = data; |
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225 } |
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226 |
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227 protected void sortLists() { |
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228 for (List<XY> xy: data.values()) { |
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229 Collections.sort(xy); |
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230 } |
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231 } |
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232 |
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233 public static final Integer findYear(String s) { |
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234 Matcher m = YEAR_PATTERN.matcher(s); |
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235 while (m.find()) { |
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236 int year = Integer.parseInt(m.group(1)); |
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237 if (year >= MIN_YEAR && year <= MAX_YEAR) { |
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238 return Integer.valueOf(year); |
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239 } |
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|
240 } |
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|
241 return null; |
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|
242 } |
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|
243 |
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changeset
|
244 public boolean parse(File file) { |
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|
245 |
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|
246 if (!(file.isFile() && file.canRead())) { |
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247 log.warn("PRF: cannot open file '" + file + "'"); |
1211
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|
248 return false; |
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|
249 } |
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|
250 |
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changeset
|
251 log.info("parsing PRF file: '" + file + "'"); |
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|
252 |
4729
0df1cac6c4b5
Removed removeExtension implementations, which have been moved to FileTools,
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diff
changeset
|
253 description = FileTools.removeExtension(file.getName()); |
1211
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254 |
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|
255 year = findYear(file.getName()); |
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|
256 |
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changeset
|
257 if (year == null) { |
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Moved file parsers to separate package.
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|
258 File parent = file.getParentFile(); |
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|
259 if (parent != null) { |
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Moved file parsers to separate package.
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|
260 description = parent.getName() + "/" + description; |
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|
261 year = findYear(parent.getName()); |
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|
262 } |
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Moved file parsers to separate package.
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parents:
diff
changeset
|
263 } |
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parents:
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changeset
|
264 |
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changeset
|
265 if (year != null) { |
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Moved file parsers to separate package.
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|
266 log.info("year of sounding: " + year); |
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Moved file parsers to separate package.
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changeset
|
267 } |
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Moved file parsers to separate package.
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changeset
|
268 |
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parents:
diff
changeset
|
269 LineNumberReader in = null; |
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|
270 |
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parents:
diff
changeset
|
271 try { |
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changeset
|
272 in = |
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changeset
|
273 new LineNumberReader( |
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|
274 new InputStreamReader( |
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changeset
|
275 new FileInputStream(file), ENCODING)); |
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|
276 |
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changeset
|
277 String line = in.readLine(); |
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changeset
|
278 |
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changeset
|
279 if (line == null || (line = line.trim()).length() == 0) { |
3660
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backend: Mention backend warnings in importer.
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3659
diff
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|
280 log.warn("PRF: file is empty."); |
1211
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Moved file parsers to separate package.
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changeset
|
281 return false; |
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changeset
|
282 } |
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changeset
|
283 |
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parents:
diff
changeset
|
284 Matcher m = DATA_PATTERN.matcher(line); |
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changeset
|
285 |
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parents:
diff
changeset
|
286 if (!m.matches()) { |
3660
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backend: Mention backend warnings in importer.
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diff
changeset
|
287 log.warn("PRF: First line does not look like a PRF data pattern."); |
1211
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changeset
|
288 return false; |
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Moved file parsers to separate package.
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changeset
|
289 } |
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diff
changeset
|
290 |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
291 DataFormat dataFormat = new DataFormat(m); |
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Moved file parsers to separate package.
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changeset
|
292 |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
293 if ((line = in.readLine()) == null |
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Moved file parsers to separate package.
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diff
changeset
|
294 || (line = line.trim()).length() == 0) { |
3660
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diff
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|
295 log.warn("PRF: premature EOF. Expected integer in line 2"); |
1211
f08fe480092c
Moved file parsers to separate package.
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diff
changeset
|
296 return false; |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
297 } |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
298 |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
299 try { |
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Moved file parsers to separate package.
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parents:
diff
changeset
|
300 if (Integer.parseInt(line) != dataFormat.maxRepetitions) { |
3660
976ead36192d
backend: Mention backend warnings in importer.
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parents:
3659
diff
changeset
|
301 log.warn("PRF: Expected " + |
1211
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
302 dataFormat.maxRepetitions + " in line 2"); |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
303 return false; |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
304 } |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
305 } |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
306 catch (NumberFormatException nfe) { |
3660
976ead36192d
backend: Mention backend warnings in importer.
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3659
diff
changeset
|
307 log.warn("PRF: invalid integer in line 2", nfe); |
1211
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
308 return false; |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
309 } |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
310 |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
311 if ((line = in.readLine()) == null) { |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
312 log.warn( |
3660
976ead36192d
backend: Mention backend warnings in importer.
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parents:
3659
diff
changeset
|
313 "PRF: premature EOF. Expected pattern for km extraction"); |
1211
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
314 return false; |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
315 } |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
316 |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
317 m = KM_PATTERN.matcher(line); |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
318 |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
319 if (!m.matches()) { |
f08fe480092c
Moved file parsers to separate package.
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parents:
diff
changeset
|
320 log.warn( |
3660
976ead36192d
backend: Mention backend warnings in importer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
3659
diff
changeset
|
321 "PRF: line 4 does not look like a PRF km extraction pattern."); |
1211
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
322 return false; |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
323 } |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
324 |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
325 KMFormat kmFormat = new KMFormat(m); |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
326 |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
327 if ((line = in.readLine()) == null |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
328 || (line = line.trim()).length() == 0) { |
3660
976ead36192d
backend: Mention backend warnings in importer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
3659
diff
changeset
|
329 log.warn("PRF: premature EOF. Expected skip row count."); |
1211
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
330 return false; |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
331 } |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
332 |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
333 int lineSkipCount; |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
334 try { |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
335 if ((lineSkipCount = Integer.parseInt(line)) < 0) { |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
336 throw new IllegalArgumentException(lineSkipCount + " < 0"); |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
337 } |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
338 } |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
339 catch (NumberFormatException nfe) { |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
340 log.warn( |
3660
976ead36192d
backend: Mention backend warnings in importer.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
3659
diff
changeset
|
341 "PRF: line 5 is not an positive integer."); |
1211
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
342 return false; |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
343 } |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
344 |
6015
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
345 int skip = lineSkipCount; |
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
346 |
1211
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
347 while ((line = in.readLine()) != null) { |
6015
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
348 // Expecting dummy lines. |
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
349 if (skip > 0) { |
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
350 skip--; |
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
351 continue; |
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
352 } |
e514cab94026
PRFParser: Re-enable line skipping. Act so on station change.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents:
5992
diff
changeset
|
353 |
1211
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
354 double km; |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
355 try { |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
356 km = kmFormat.extractKm(line); |
f08fe480092c
Moved file parsers to separate package.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
changeset
|
357 } |
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358 catch (NumberFormatException iae) { |
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359 log.warn("PRF: cannot extract km in line " + in.getLineNumber()); |
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360 return false; |
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361 } |
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362 |
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363 Double station = Double.valueOf(km); |
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364 |
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365 List<XY> kmData = data.get(station); |
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366 |
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367 // When the station changed we know we are expecting skip/dummy lines. |
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368 if (kmData == null) { |
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369 //log.debug("found new km: " + station); |
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370 kmData = new ArrayList<XY>(); |
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371 data.put(station, kmData); |
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372 // When a station change occurs, dummy lines will occur, too. |
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373 skip = lineSkipCount; |
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374 continue; |
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375 } |
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376 |
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377 dataFormat.extractData(line, kmData); |
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378 } |
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379 |
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380 // sort all the lists by x and index |
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381 sortLists(); |
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382 } |
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383 catch (IOException ioe) { |
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384 log.error("Error reading PRF file.", ioe); |
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385 return false; |
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386 } |
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387 finally { |
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388 if (in != null) { |
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389 try { |
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390 in.close(); |
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391 } |
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392 catch (IOException ioe) { |
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393 log.error("Error closing PRF file.", ioe); |
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394 } |
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395 } |
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396 } |
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397 |
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398 return true; |
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399 } |
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400 |
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401 public void reset() { |
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402 data.clear(); |
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403 year = null; |
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404 description = null; |
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405 } |
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406 |
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407 public void parsePRFs(File root, final CrossSectionParser.Callback callback) { |
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408 |
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409 FileTools.walkTree(root, new FileTools.FileVisitor() { |
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410 @Override |
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411 public boolean visit(File file) { |
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412 if (file.isFile() && file.canRead() |
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413 && file.getName().toLowerCase().endsWith(".prf") |
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414 && (callback == null || callback.accept(file))) { |
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415 reset(); |
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416 boolean success = parse(file); |
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417 log.info("parsing " + (success ? "succeeded" : "failed")); |
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418 if (success && callback != null) { |
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419 callback.parsed(PRFParser.this); |
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420 } |
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421 } |
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422 return true; |
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423 } |
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424 }); |
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425 } |
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426 |
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427 public static void main(String [] args) { |
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428 |
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429 PRFParser parser = new PRFParser(); |
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430 |
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431 for (String arg: args) { |
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432 parser.parsePRFs(new File(arg), null); |
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433 } |
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434 } |
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|
435 } |
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436 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |