Mercurial > dive4elements > river

comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java @ 3786:4adc35aa655c

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merged flys-artifacts/2.9.1
author Thomas Arendsen Hein <thomas@intevation.de>
date Fri, 28 Sep 2012 12:14:47 +0200
parents b2ea89a665bc
children f4fd64a4d502
comparison
equal deleted inserted replaced
3719:e82acd5c86f7 3786:4adc35aa655c
1 package de.intevation.flys.artifacts.model;
2
3 import java.util.Arrays;
4 import java.util.List;
5 import java.util.ArrayList;
6
7 import net.sf.ehcache.Cache;
8 import net.sf.ehcache.Element;
9
10 import de.intevation.flys.artifacts.cache.CacheFactory;
11
12 import de.intevation.flys.backend.SessionHolder;
13
14 import org.apache.log4j.Logger;
15
16 import de.intevation.flys.model.River;
17 import de.intevation.flys.model.Wst;
18
19 import org.hibernate.Session;
20 import org.hibernate.Query;
21 import org.hibernate.SQLQuery;
22
23 import org.hibernate.type.StandardBasicTypes;
24
25 /**
26 * Creates WstValueTable s from database.
27 * WstValueTable s are used to interpolate given w/q/km values.
28 */
29 public class WstValueTableFactory
30 {
31 private static Logger log = Logger.getLogger(WstValueTableFactory.class);
32
33 public static final int DEFAULT_KIND = 0;
34
35 // TODO: put this into a property file
36
37 public static final String HQL_WST =
38 "from Wst where river=:river and kind=:kind";
39
40 public static final String SQL_SELECT_NAMES_POS =
41 "SELECT position, name FROM wst_columns " +
42 "WHERE wst_id = :wst_id ORDER BY position";
43
44 /** Select Qs for wst (view sorted by column). */
45 public static final String SQL_SELECT_QS =
46 "SELECT column_pos, q, a, b FROM wst_q_values " +
47 "WHERE wst_id = :wst_id";
48
49 // (sorted by km)
50 public static final String SQL_SELECT_WS =
51 "SELECT km, w, column_pos FROM wst_w_values " +
52 "WHERE wst_id = :wst_id";
53
54 /** Statement to query qranges of a single column. */
55 public static final String SQL_SELECT_QS_AT_COL =
56 "SELECT q, a, b FROM wst_q_values " +
57 "WHERE wst_id = :wst_id AND column_pos = :column_pos";
58
59 // (sorted by km)
60 public static final String SQL_SELECT_WS_AT_COL =
61 "SELECT km, w FROM wst_w_values " +
62 "WHERE wst_id = :wst_id AND column_pos = :column_pos";
63
64
65 private WstValueTableFactory() {
66 }
67
68
69 public static WstValueTable getTable(River river) {
70 return getTable(river, DEFAULT_KIND);
71 }
72
73
74 /**
75 * Get WstValueTable to interpolate values of a given Wst.
76 */
77 public static WstValueTable getTable(int wst_id) {
78
79 Cache cache = CacheFactory.getCache(WstValueTableCacheKey.CACHE_NAME);
80
81 WstValueTableCacheKey cacheKey;
82
83 if (cache != null) {
84 // "-1" is the symbolic river-id for "no river, but wst_id".
85 cacheKey = new WstValueTableCacheKey(-1, wst_id);
86 Element element = cache.get(cacheKey);
87 if (element != null) {
88 log.debug("Got specific wst value table from cache");
89 return (WstValueTable) element.getValue();
90 }
91 }
92 else {
93 cacheKey = null;
94 }
95
96 Session session = SessionHolder.HOLDER.get();
97
98 // Fetch data for one column only.
99
100 WstValueTable.Column [] columns = loadColumns(session, wst_id);
101 loadQRanges(session, columns, wst_id);
102 List<WstValueTable.Row> rows = loadRows(session, wst_id, columns.length);
103
104 WstValueTable valueTable = new WstValueTable(columns, rows);
105
106 if (valueTable != null && cacheKey != null) {
107 log.debug("Store wst value table in cache");
108 Element element = new Element(cacheKey, valueTable);
109 cache.put(element);
110 }
111
112 return valueTable;
113 }
114
115 /**
116 * Get Table for a specific column of a wst.
117 */
118 public static WstValueTable getWstColumnTable(int wst_id, int col_pos) {
119
120 Cache cache = CacheFactory.getCache(WstValueTableCacheKey.CACHE_NAME);
121
122 WstValueTableCacheKey cacheKey;
123
124 if (cache != null) {
125 // A negaitve/negative number is the symbolic 'river-id' for
126 // "no river and kind but wst_id and colpos".
127 cacheKey = new WstValueTableCacheKey(-wst_id, -col_pos);
128 Element element = cache.get(cacheKey);
129 if (element != null) {
130 log.debug("Got specific wst value table from cache");
131 return (WstValueTable) element.getValue();
132 }
133 }
134 else {
135 cacheKey = null;
136 }
137
138 Session session = SessionHolder.HOLDER.get();
139
140 // Fetch data for one column only.
141
142 WstValueTable.Column [] columns = loadColumn(session, wst_id, col_pos);
143 loadQRanges(session, columns, wst_id, col_pos);
144 List<WstValueTable.Row> rows = loadRowsOneColumn(session, wst_id, col_pos);
145
146 WstValueTable valueTable = new WstValueTable(columns, rows);
147
148 if (valueTable != null && cacheKey != null) {
149 log.debug("Store wst value table in cache (wst: "
150 + wst_id + "/ col: " + col_pos + ")");
151 Element element = new Element(cacheKey, valueTable);
152 cache.put(element);
153 }
154
155 return valueTable;
156 }
157
158
159 /**
160 * Get table for first wst of given kind at given river.
161 */
162 public static WstValueTable getTable(River river, int kind) {
163
164 Cache cache = CacheFactory.getCache(WstValueTableCacheKey.CACHE_NAME);
165
166 WstValueTableCacheKey cacheKey;
167
168 if (cache != null) {
169 cacheKey = new WstValueTableCacheKey(river.getId(), kind);
170 Element element = cache.get(cacheKey);
171 if (element != null) {
172 log.debug("got wst value table from cache");
173 return (WstValueTable)element.getValue();
174 }
175 }
176 else {
177 cacheKey = null;
178 }
179
180 WstValueTable valueTable = getTableUncached(river, kind);
181
182 if (valueTable != null && cacheKey != null) {
183 log.debug("store wst value table in cache");
184 Element element = new Element(cacheKey, valueTable);
185 cache.put(element);
186 }
187
188 return valueTable;
189 }
190
191 public static WstValueTable getTableUncached(River river) {
192 return getTableUncached(river, DEFAULT_KIND);
193 }
194
195 public static WstValueTable getTableUncached(River river, int kind) {
196
197 Session session = SessionHolder.HOLDER.get();
198
199 Wst wst = loadWst(session, river, kind);
200
201 if (wst == null) {
202 return null;
203 }
204
205 WstValueTable.Column [] columns = loadColumns(session, wst);
206
207 loadQRanges(session, columns, wst);
208
209 List<WstValueTable.Row> rows = loadRows(session, wst, columns.length);
210
211 return new WstValueTable(columns, rows);
212 }
213
214 /**
215 * @param kind Kind of wst.
216 */
217 protected static Wst loadWst(Session session, River river, int kind) {
218 Query query = session.createQuery(HQL_WST);
219 query.setParameter("river", river);
220 query.setInteger("kind", kind);
221
222 List<Wst> wsts = query.list();
223
224 // TODO Multiple wsts can match, why return just the first one?
225 return wsts.isEmpty() ? null : wsts.get(0);
226 }
227
228
229 /**
230 * Load rows with a single columns result.
231 *
232 * @param session session to use for querying db.
233 * @param wstId id of wst (in db).
234 * @param column_pos the column_pos (within the db) of the wst_value_table
235 * of which the values shall be fetched.
236 *
237 * @return resultant rows.
238 */
239 protected static List<WstValueTable.Row> loadRowsOneColumn(
240 Session session,
241 int wstId,
242 int column_pos
243 ) {
244 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS_AT_COL)
245 .addScalar("km", StandardBasicTypes.DOUBLE)
246 .addScalar("w", StandardBasicTypes.DOUBLE);
247
248 sqlQuery.setInteger("wst_id", wstId);
249 sqlQuery.setInteger("column_pos", column_pos);
250
251 List<Object []> results = sqlQuery.list();
252
253 double [] ws = null;
254
255 List<WstValueTable.Row> rows =
256 new ArrayList<WstValueTable.Row>(results.size());
257
258 // Walk over rows.
259 for (Object [] result: results) {
260 ws = new double[1];
261 WstValueTable.Row row =
262 new WstValueTable.Row((Double) result[0], ws);
263 rows.add(row);
264
265 Double w = (Double) result[1];
266 ws[0] = w != null ? w : Double.NaN;
267 }
268
269 return rows;
270 }
271
272 protected static List<WstValueTable.Row> loadRows(
273 Session session,
274 int wst_id,
275 int numColumns
276 ) {
277 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS)
278 .addScalar("km", StandardBasicTypes.DOUBLE)
279 .addScalar("w", StandardBasicTypes.DOUBLE)
280 .addScalar("column_pos", StandardBasicTypes.INTEGER);
281
282 sqlQuery.setInteger("wst_id", wst_id);
283
284 List<Object []> results = sqlQuery.list();
285
286 int lastColumn = Integer.MAX_VALUE;
287 double [] ws = null;
288
289 ArrayList<WstValueTable.Row> rows = new ArrayList<WstValueTable.Row>();
290
291 for (Object [] result: results) {
292 int column = (Integer)result[2];
293 if (column < lastColumn) {
294 ws = new double[numColumns];
295 Arrays.fill(ws, Double.NaN);
296 WstValueTable.Row row =
297 new WstValueTable.Row((Double)result[0], ws);
298 rows.add(row);
299 }
300 Double w = (Double)result[1];
301 ws[column] = w != null ? w : Double.NaN;
302 lastColumn = column;
303 }
304
305 rows.trimToSize();
306 return rows;
307 }
308
309 protected static List<WstValueTable.Row> loadRows(
310 Session session,
311 Wst wst,
312 int numColumns
313 ) {
314 return loadRows(session, wst.getId(), numColumns);
315 }
316
317
318 protected static WstValueTable.Column [] loadColumn(
319 Session session,
320 int wst_id,
321 int col_pos
322 ) {
323 return new WstValueTable.Column [] {
324 new WstValueTable.Column(WKmsFactory.getWKmsName(col_pos, wst_id))};
325 }
326
327
328 /**
329 * Get columns from wst-id.
330 */
331 protected static WstValueTable.Column [] loadColumns(
332 Session session,
333 int wst_id
334 ) {
335 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_NAMES_POS)
336 .addScalar("position", StandardBasicTypes.INTEGER)
337 .addScalar("name", StandardBasicTypes.STRING);
338
339 sqlQuery.setInteger("wst_id", wst_id);
340
341 List<Object []> columnNames = sqlQuery.list();
342
343 WstValueTable.Column [] columns =
344 new WstValueTable.Column[columnNames.size()];
345
346 for (int i = 0; i < columns.length; ++i) {
347 columns[i] = new WstValueTable.Column(
348 (String)columnNames.get(i)[1]);
349 }
350 return columns;
351 }
352
353 /**
354 * Get columns from Wst.
355 */
356 protected static WstValueTable.Column [] loadColumns(
357 Session session,
358 Wst wst
359 ) {
360 return loadColumns(session, wst.getId());
361 }
362
363
364 /**
365 * Build a QRange-Tree.
366 */
367 protected static void loadQRanges(
368 Session session,
369 WstValueTable.Column [] columns,
370 int wst_id,
371 int column_pos
372 ) {
373 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_QS_AT_COL)
374 .addScalar("q", StandardBasicTypes.DOUBLE)
375 .addScalar("a", StandardBasicTypes.DOUBLE)
376 .addScalar("b", StandardBasicTypes.DOUBLE);
377
378 sqlQuery.setInteger("wst_id", wst_id);
379 sqlQuery.setInteger("column_pos", column_pos);
380
381 List<Object []> qRanges = sqlQuery.list();
382
383 int qSize = qRanges.size();
384
385 QRangeTree qRangeTree = new QRangeTree(
386 qRanges, QRangeTree.WITHOUT_COLUMN, 0, qSize);
387 columns[0].setQRangeTree(qRangeTree);
388 }
389
390 protected static void loadQRanges(
391 Session session,
392 WstValueTable.Column [] columns,
393 int wst_id
394 ) {
395 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_QS)
396 .addScalar("column_pos", StandardBasicTypes.INTEGER)
397 .addScalar("q", StandardBasicTypes.DOUBLE)
398 .addScalar("a", StandardBasicTypes.DOUBLE)
399 .addScalar("b", StandardBasicTypes.DOUBLE);
400
401 sqlQuery.setInteger("wst_id", wst_id);
402
403 List<Object []> qRanges = sqlQuery.list();
404
405 int start = -1;
406 int Q = qRanges.size();
407 Integer lastColumn = null;
408
409 for (int i = 0; i < Q; ++i) {
410 Object [] qRange = qRanges.get(i);
411 Integer columnId = (Integer)qRange[0];
412 if (lastColumn == null) {
413 lastColumn = columnId;
414 start = i;
415 }
416 else if (!lastColumn.equals(columnId)) {
417 QRangeTree qRangeTree = new QRangeTree(qRanges, start, i);
418 columns[lastColumn].setQRangeTree(qRangeTree);
419 lastColumn = columnId;
420 start = i;
421 }
422 }
423
424 if (start != -1) {
425 QRangeTree qRangeTree = new QRangeTree(qRanges, start, Q);
426 columns[lastColumn].setQRangeTree(qRangeTree);
427 }
428
429 /* This is debug code to visualize the q ranges trees
430
431 java.io.PrintWriter out = null;
432 try {
433 out = new java.io.PrintWriter(
434 new java.io.FileWriter(
435 "/tmp/qranges" + System.currentTimeMillis() + ".dot"));
436
437 out.println("graph \"Q ranges trees\" {");
438
439 for (int i = 0; i < columns.length; ++i) {
440 QRangeTree tree = columns[i].getQRangeTree();
441 out.println(tree.toGraph());
442 }
443
444 out.println("}");
445
446 out.flush();
447 }
448 catch (java.io.IOException ioe) {
449 log.error(ioe);
450 }
451 finally {
452 if (out != null) {
453 out.close();
454 }
455 }
456 */
457
458 }
459
460 protected static void loadQRanges(
461 Session session,
462 WstValueTable.Column [] columns,
463 Wst wst
464 ) {
465 loadQRanges(session, columns, wst.getId());
466 }
467
468 }
469 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org