Mercurial > dive4elements > river
annotate flys-backend/src/main/java/de/intevation/flys/importer/PRFParser.java @ 1197:ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
flys-backend/trunk@2297 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Thu, 07 Jul 2011 09:29:31 +0000 |
parents | 46127af605ba |
children | 661a9304f2f5 |
rev | line source |
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1196
46127af605ba
Added parser for PRF files. TODO: Extract data and km.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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1 package de.intevation.flys.importer; |
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2 |
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3 import java.util.Map; |
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4 import java.util.Stack; |
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5 import java.util.TreeMap; |
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6 |
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7 import java.util.regex.Pattern; |
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8 import java.util.regex.Matcher; |
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9 |
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10 import java.io.File; |
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11 import java.io.InputStreamReader; |
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12 import java.io.LineNumberReader; |
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13 import java.io.FileInputStream; |
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14 import java.io.IOException; |
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15 |
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16 import org.apache.log4j.Logger; |
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17 |
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18 public class PRFParser |
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19 { |
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20 private static Logger log = Logger.getLogger(PRFParser.class); |
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21 |
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22 public static final String ENCODING = |
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23 System.getProperty("flys.backend.prf.encoding", "ISO-8859-1"); |
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24 |
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25 public static final Pattern DATA_PATTERN = |
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26 Pattern.compile( |
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27 "\\((\\d+)x\\s*,\\s*(\\d+)\\(" + |
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28 "\\s*f(\\d+)\\.(\\d+)\\s*,\\s*f(\\d+)\\.(\\d+)\\s*\\)?\\)?"); |
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29 |
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30 public static final Pattern KM_PATTERN = |
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31 Pattern.compile("\\((\\d+)x\\s*,\\s*f(\\d+)\\.(\\d+)\\s*\\)?"); |
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32 |
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33 public static class DataFormat { |
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34 |
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35 protected int deleteChars; |
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36 protected int maxRepetitions; |
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37 protected int firstIntegerPlaces; |
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38 protected int firstFractionPlaces; |
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39 protected int secondIntegerPlaces; |
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40 protected int secondFractionPlaces; |
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41 |
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42 public DataFormat() { |
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43 } |
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44 |
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45 public DataFormat(Matcher m) { |
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46 deleteChars = Integer.parseInt(m.group(1)); |
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47 maxRepetitions = Integer.parseInt(m.group(2)); |
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48 firstIntegerPlaces = Integer.parseInt(m.group(3)); |
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49 firstFractionPlaces = Integer.parseInt(m.group(4)); |
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50 secondIntegerPlaces = Integer.parseInt(m.group(5)); |
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51 secondFractionPlaces = Integer.parseInt(m.group(6)); |
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52 } |
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53 |
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54 public boolean extractData(String line, Map<Double, Double> dest) |
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55 throws NumberFormatException |
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56 { |
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57 //TODO: Implement me! |
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58 return true; |
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59 } |
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60 } // class DataFormat |
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61 |
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62 public static class KMFormat { |
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63 protected int deleteChars; |
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64 protected int integerPlaces; |
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65 protected int fractionPlaces; |
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66 |
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67 protected double scale; |
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68 protected double shift; |
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69 |
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70 public KMFormat() { |
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71 } |
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72 |
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73 public KMFormat(Matcher m) { |
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74 deleteChars = Integer.parseInt(m.group(1)); |
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75 integerPlaces = Integer.parseInt(m.group(2)); |
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76 fractionPlaces = Integer.parseInt(m.group(3)); |
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77 |
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78 shift = Math.pow(10, fractionPlaces); |
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79 scale = 1d/shift; |
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80 } |
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81 |
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82 public double extractKm(String line) throws NumberFormatException { |
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83 |
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84 if (line.length() <= deleteChars) { |
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85 throw new NumberFormatException("line too short"); |
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86 } |
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87 |
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88 String kmS = |
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89 line.substring(deleteChars, deleteChars+integerPlaces); |
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90 |
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91 double km = Double.parseDouble(kmS.trim()); |
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92 |
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93 return fractionPlaces > 0 |
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94 ? ((int)((scale*km)*shift))/shift |
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95 : km; |
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96 } |
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97 } // class KMFormat |
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98 |
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99 protected Map<Double, Map<Double, Double>> data; |
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100 |
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101 public PRFParser() { |
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102 data = new TreeMap<Double, Map<Double, Double>>(); |
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103 } |
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104 |
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105 |
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106 public boolean parse(File file) { |
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107 |
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108 if (!(file.isFile() && file.canRead())) { |
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|
109 log.warn("cannot open file '" + file + "'"); |
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110 return false; |
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parents:
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|
111 } |
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112 |
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113 log.info("parsing PRF file: '" + file + "'"); |
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114 |
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|
115 LineNumberReader in = null; |
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|
116 |
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117 try { |
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|
118 in = |
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|
119 new LineNumberReader( |
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120 new InputStreamReader( |
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|
121 new FileInputStream(file), ENCODING)); |
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122 |
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123 String line = in.readLine(); |
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124 |
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125 if (line == null || (line = line.trim()).length() == 0) { |
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126 log.warn("file is empty."); |
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127 return false; |
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128 } |
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129 |
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130 Matcher m = DATA_PATTERN.matcher(line); |
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131 |
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132 if (!m.matches()) { |
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133 log.warn("First line does not look like a PRF data pattern."); |
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134 return false; |
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135 } |
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136 |
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137 DataFormat dataFormat = new DataFormat(m); |
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138 |
1197
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139 if ((line = in.readLine()) == null |
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140 || (line = line.trim()).length() == 0) { |
1196
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141 log.warn("premature EOF. Expected integer in line 2"); |
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142 return false; |
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parents:
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143 } |
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144 |
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145 try { |
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146 if (Integer.parseInt(line) != dataFormat.maxRepetitions) { |
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Added parser for PRF files. TODO: Extract data and km.
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147 log.warn("Expected " + |
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|
148 dataFormat.maxRepetitions + " in line 2"); |
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149 return false; |
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|
150 } |
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parents:
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|
151 } |
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152 catch (NumberFormatException nfe) { |
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|
153 log.warn("invalid integer in line 2", nfe); |
46127af605ba
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154 return false; |
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parents:
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|
155 } |
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156 |
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157 if ((line = in.readLine()) == null) { |
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|
158 log.warn( |
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|
159 "premature EOF. Expected pattern for km extraction"); |
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Added parser for PRF files. TODO: Extract data and km.
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|
160 return false; |
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parents:
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|
161 } |
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parents:
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|
162 |
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163 m = KM_PATTERN.matcher(line); |
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164 |
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|
165 if (!m.matches()) { |
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Added parser for PRF files. TODO: Extract data and km.
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diff
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|
166 log.warn( |
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parents:
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|
167 "line 4 does not look like a PRF km extraction pattern."); |
46127af605ba
Added parser for PRF files. TODO: Extract data and km.
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parents:
diff
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|
168 return false; |
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Added parser for PRF files. TODO: Extract data and km.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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|
169 } |
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Added parser for PRF files. TODO: Extract data and km.
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170 |
1197
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|
171 KMFormat kmFormat = new KMFormat(m); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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172 |
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PRFParser: extract km from lines. TODO: extract data.
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173 if ((line = in.readLine()) == null |
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PRFParser: extract km from lines. TODO: extract data.
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|
174 || (line = line.trim()).length() == 0) { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
175 log.warn("premature EOF. Expected skip row count."); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
176 return false; |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
177 } |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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|
178 |
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PRFParser: extract km from lines. TODO: extract data.
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|
179 int lineSkipCount; |
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PRFParser: extract km from lines. TODO: extract data.
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|
180 try { |
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PRFParser: extract km from lines. TODO: extract data.
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diff
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|
181 if ((lineSkipCount = Integer.parseInt(line)) < 0) { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
182 throw new IllegalArgumentException(lineSkipCount + " < 0"); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
183 } |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
184 } |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
185 catch (NumberFormatException nfe) { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
186 log.warn( |
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PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
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|
187 "line 5 is not an positive integer."); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
188 return false; |
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PRFParser: extract km from lines. TODO: extract data.
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diff
changeset
|
189 } |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
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|
190 |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
191 int skip = lineSkipCount; |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
192 |
1196
46127af605ba
Added parser for PRF files. TODO: Extract data and km.
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parents:
diff
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|
193 while ((line = in.readLine()) != null) { |
1197
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
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|
194 if (skip > 0) { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
195 --skip; |
1196
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diff
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|
196 continue; |
46127af605ba
Added parser for PRF files. TODO: Extract data and km.
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parents:
diff
changeset
|
197 } |
1197
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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|
198 double km; |
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PRFParser: extract km from lines. TODO: extract data.
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diff
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|
199 try { |
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PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
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|
200 km = kmFormat.extractKm(line); |
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PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
201 } |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
202 catch (NumberFormatException iae) { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
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|
203 log.warn("cannot extract km in line + " + in.getLineNumber()); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
204 return false; |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
205 } |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
206 |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
changeset
|
207 Double station = Double.valueOf(km); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
changeset
|
208 |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
209 Map<Double, Double> kmData = data.get(station); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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diff
changeset
|
210 |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
211 if (kmData == null) { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
212 log.debug("found new km: " + station); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
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|
213 kmData = new TreeMap<Double, Double>(); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
214 data.put(station, kmData); |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
215 } |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
1196
diff
changeset
|
216 |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
1196
diff
changeset
|
217 try { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
218 if (!dataFormat.extractData(line, kmData)) { |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
|
219 skip = lineSkipCount; |
ce3dacc6ea92
PRFParser: extract km from lines. TODO: extract data.
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parents:
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diff
changeset
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220 } |
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221 } |
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222 catch (NumberFormatException nfe) { |
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223 log.warn("cannot extract data from line " + in.getLineNumber()); |
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224 return false; |
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225 } |
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226 } |
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227 } |
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228 catch (IOException ioe) { |
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229 log.error(ioe); |
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230 return false; |
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231 } |
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232 finally { |
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233 if (in != null) { |
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234 try { |
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235 in.close(); |
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236 } |
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237 catch (IOException ioe) { |
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238 log.error(ioe); |
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239 } |
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240 } |
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241 } |
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242 |
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243 return true; |
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244 } |
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245 |
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246 public void reset() { |
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247 data.clear(); |
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248 } |
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249 |
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250 public static void parsePRFs(File root) { |
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251 |
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252 PRFParser parser = new PRFParser(); |
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253 |
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254 Stack<File> stack = new Stack<File>(); |
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255 stack.push(root); |
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256 |
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257 while (!stack.empty()) { |
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258 File file = stack.pop(); |
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259 if (file.isDirectory()) { |
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260 File [] files = file.listFiles(); |
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261 if (files != null) { |
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262 for (File f: files) { |
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263 stack.push(f); |
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264 } |
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265 } |
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266 } |
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267 else if (file.isFile() |
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268 && file.getName().toLowerCase().endsWith(".prf") |
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269 ) { |
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270 parser.reset(); |
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271 boolean success = parser.parse(file); |
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272 log.info("parsing " + (success ? "succeeded" : "failed")); |
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273 } |
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274 } |
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275 } |
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276 |
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277 public static void main(String [] args) { |
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278 |
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279 for (String arg: args) { |
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280 parsePRFs(new File(arg)); |
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281 } |
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282 } |
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283 } |
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284 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |