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comparison flys-backend/src/main/java/de/intevation/flys/importer/PRFParser.java @ 1197:ce3dacc6ea92

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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>
date Thu, 07 Jul 2011 09:29:31 +0000
parents 46127af605ba
children 661a9304f2f5
comparison
equal deleted inserted replaced
1196:46127af605ba 1197:ce3dacc6ea92
49 firstFractionPlaces = Integer.parseInt(m.group(4)); 49 firstFractionPlaces = Integer.parseInt(m.group(4));
50 secondIntegerPlaces = Integer.parseInt(m.group(5)); 50 secondIntegerPlaces = Integer.parseInt(m.group(5));
51 secondFractionPlaces = Integer.parseInt(m.group(6)); 51 secondFractionPlaces = Integer.parseInt(m.group(6));
52 } 52 }
53 53
54 public void extractData(String line, Map<Double, Double> dest) { 54 public boolean extractData(String line, Map<Double, Double> dest)
55 throws NumberFormatException
56 {
55 //TODO: Implement me! 57 //TODO: Implement me!
58 return true;
56 } 59 }
57 } // class DataFormat 60 } // class DataFormat
58 61
59 public static class KMFormat { 62 public static class KMFormat {
60 protected int deleteChars; 63 protected int deleteChars;
61 protected int integerPlaces; 64 protected int integerPlaces;
62 protected int fractionPlaces; 65 protected int fractionPlaces;
63 66
67 protected double scale;
68 protected double shift;
69
64 public KMFormat() { 70 public KMFormat() {
65 } 71 }
66 72
67 public KMFormat(Matcher m) { 73 public KMFormat(Matcher m) {
68 deleteChars = Integer.parseInt(m.group(1)); 74 deleteChars = Integer.parseInt(m.group(1));
69 integerPlaces = Integer.parseInt(m.group(2)); 75 integerPlaces = Integer.parseInt(m.group(2));
70 fractionPlaces = Integer.parseInt(m.group(3)); 76 fractionPlaces = Integer.parseInt(m.group(3));
71 } 77
72 78 shift = Math.pow(10, fractionPlaces);
73 public double extractKm(String line) { 79 scale = 1d/shift;
74 // TODO: Implement me! 80 }
75 return 0d; 81
82 public double extractKm(String line) throws NumberFormatException {
83
84 if (line.length() <= deleteChars) {
85 throw new NumberFormatException("line too short");
86 }
87
88 String kmS =
89 line.substring(deleteChars, deleteChars+integerPlaces);
90
91 double km = Double.parseDouble(kmS.trim());
92
93 return fractionPlaces > 0
94 ? ((int)((scale*km)*shift))/shift
95 : km;
76 } 96 }
77 } // class KMFormat 97 } // class KMFormat
78 98
79 protected Map<Double, Map<Double, Double>> data; 99 protected Map<Double, Map<Double, Double>> data;
80 100
114 return false; 134 return false;
115 } 135 }
116 136
117 DataFormat dataFormat = new DataFormat(m); 137 DataFormat dataFormat = new DataFormat(m);
118 138
119 if ((line = in.readLine()) == null) { 139 if ((line = in.readLine()) == null
140 || (line = line.trim()).length() == 0) {
120 log.warn("premature EOF. Expected integer in line 2"); 141 log.warn("premature EOF. Expected integer in line 2");
121 return false; 142 return false;
122 } 143 }
123 144
124 try { 145 try {
145 log.warn( 166 log.warn(
146 "line 4 does not look like a PRF km extraction pattern."); 167 "line 4 does not look like a PRF km extraction pattern.");
147 return false; 168 return false;
148 } 169 }
149 170
171 KMFormat kmFormat = new KMFormat(m);
172
173 if ((line = in.readLine()) == null
174 || (line = line.trim()).length() == 0) {
175 log.warn("premature EOF. Expected skip row count.");
176 return false;
177 }
178
179 int lineSkipCount;
180 try {
181 if ((lineSkipCount = Integer.parseInt(line)) < 0) {
182 throw new IllegalArgumentException(lineSkipCount + " < 0");
183 }
184 }
185 catch (NumberFormatException nfe) {
186 log.warn(
187 "line 5 is not an positive integer.");
188 return false;
189 }
190
191 int skip = lineSkipCount;
192
150 while ((line = in.readLine()) != null) { 193 while ((line = in.readLine()) != null) {
151 if (line.length() == 0) { 194 if (skip > 0) {
195 --skip;
152 continue; 196 continue;
153 } 197 }
154 // TODO: Do data and km extraction 198 double km;
199 try {
200 km = kmFormat.extractKm(line);
201 }
202 catch (NumberFormatException iae) {
203 log.warn("cannot extract km in line + " + in.getLineNumber());
204 return false;
205 }
206
207 Double station = Double.valueOf(km);
208
209 Map<Double, Double> kmData = data.get(station);
210
211 if (kmData == null) {
212 log.debug("found new km: " + station);
213 kmData = new TreeMap<Double, Double>();
214 data.put(station, kmData);
215 }
216
217 try {
218 if (!dataFormat.extractData(line, kmData)) {
219 skip = lineSkipCount;
220 }
221 }
222 catch (NumberFormatException nfe) {
223 log.warn("cannot extract data from line " + in.getLineNumber());
224 return false;
225 }
155 } 226 }
156 } 227 }
157 catch (IOException ioe) { 228 catch (IOException ioe) {
158 log.error(ioe); 229 log.error(ioe);
159 return false; 230 return false;
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