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comparison flys-artifacts/src/main/java/org/dive4elements/river/artifacts/model/HYKFactory.java @ 5831:bd047b71ab37

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Repaired internal references
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 12:06:39 +0200
parents flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/HYKFactory.java@c27c4e06dd87
children
comparison
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5830:160f53ee0870 5831:bd047b71ab37
1 package org.dive4elements.river.artifacts.model;
2
3 import org.dive4elements.river.artifacts.cache.CacheFactory;
4 import org.dive4elements.river.backend.SessionHolder;
5 import org.dive4elements.river.model.HYK;
6 import org.dive4elements.river.model.HYKFlowZone;
7 import org.dive4elements.river.model.HYKFormation;
8
9 import java.io.Serializable;
10 import java.util.ArrayList;
11 import java.util.List;
12
13 import net.sf.ehcache.Cache;
14 import net.sf.ehcache.Element;
15
16 import org.apache.log4j.Logger;
17 import org.hibernate.Query;
18 import org.hibernate.SQLQuery;
19 import org.hibernate.Session;
20 import org.hibernate.type.StandardBasicTypes;
21
22
23 /**
24 * Factory to access HYKs (hydrographic values).
25 */
26 public class HYKFactory
27 {
28 private static Logger logger = Logger.getLogger(HYKFactory.class);
29
30 public static String HYK_CACHE_NAME = "hykache";
31
32
33 /** Do not instantiate a HYKFactory. */
34 private HYKFactory() {
35 }
36
37
38 /**
39 * Get List of Zones for given river and km.
40 */
41 public static Object getHYKs(int hykid, double km) {
42 logger.debug("HYKFactory.getHYKs");
43
44 Cache cache = CacheFactory.getCache(HYK_CACHE_NAME);
45
46 String cacheKey;
47
48 if (cache != null) {
49 cacheKey = "" + hykid + "_" + km;
50 Element element = cache.get(cacheKey);
51 if (element != null) {
52 logger.debug("Got hyk from cache");
53 return element.getValue();
54 }
55 }
56 else {
57 cacheKey = null;
58 }
59
60 List<Zone> zones = getZonesUncached(hykid, km);
61
62 if (zones != null && cacheKey != null) {
63 logger.debug("Store hykzones in cache.");
64 Element element = new Element(cacheKey, zones);
65 cache.put(element);
66 }
67
68 return zones;
69 }
70
71
72 /** Return name for hyk with given id. */
73 public static String getHykName(int hykid) {
74 logger.debug("HYKFactory.getHykName " + hykid);
75
76 Session session = SessionHolder.HOLDER.get();
77
78 Query query = session.createQuery(
79 "select description from HYK where id = :hykid ");
80 query.setParameter("hykid", hykid);
81
82 return (String) query.uniqueResult();
83 }
84
85
86 /**
87 * Ask DB for hyk zones.
88 * @param hykid ID of the 'main' HYK to query.
89 * @param km for which to get the hyk-zones.
90 * @return according zones.
91 */
92 public static List<Zone> getZonesUncached(int hykid, double km) {
93 if (logger.isDebugEnabled()) {
94 logger.debug("HYKFactory.getZoneUncached " + hykid + " km " + km);
95 }
96
97 Session session = SessionHolder.HOLDER.get();
98
99 // Find out flow-direction of river.
100 // OPTIMIZE: 1) query kmUp directly 2) merge queries.
101 Query rQuery = session.createQuery("from HYK where id = :hykid");
102 rQuery.setParameter("hykid", hykid);
103 rQuery.setMaxResults(1);
104 HYK hyk = (HYK) rQuery.uniqueResult();
105
106 double flowDir = hyk.getRiver().getKmUp() ? 1 : -1;
107
108 List<HYKFormation> forms = getHYKFormations(hykid, km, flowDir);
109 List<Zone> zones = new ArrayList<Zone>();
110
111 // Take the first one.
112 if (forms.size() >= 1) {
113 HYKFormation form = forms.get(0);
114 // Create respective zones.
115 for (HYKFlowZone flowZone: form.getZones()) {
116 Zone z = new Zone(flowZone.getA().doubleValue(),
117 flowZone.getB().doubleValue(),
118 flowZone.getType().getName());
119 zones.add(z);
120 }
121 }
122
123 return zones;
124 }
125
126
127 protected static List<HYKFormation> getHYKFormations(
128 int hykid,
129 double km,
130 double flowDir
131 ) {
132 Session session = SessionHolder.HOLDER.get();
133
134 String SQL = "SELECT " +
135 " f.id AS FID, " +
136 " f.distance_vl AS DIST, " +
137 " e.hyk_id AS HID, " +
138 " e.km AS KM " +
139 " FROM hyk_formations f INNER JOIN hyk_entries e " +
140 " ON e.id = f.hyk_entry_id " +
141 " WHERE e.hyk_id = :hykid " +
142 " AND :km between " +
143 " LEAST(e.km, e.km + :flowDir*(f.distance_vl/1000.0+0.001)) " +
144 " AND " +
145 " GREATEST(e.km, e.km + :flowDir*(f.distance_vl/1000.0+0.001))";
146
147 SQLQuery sqlQuery = session.createSQLQuery(SQL)
148 .addScalar("FID", StandardBasicTypes.INTEGER)
149 .addScalar("DIST", StandardBasicTypes.DOUBLE)
150 .addScalar("HID", StandardBasicTypes.INTEGER)
151 .addScalar("KM", StandardBasicTypes.DOUBLE);
152
153 sqlQuery.setInteger("hykid", hykid);
154 sqlQuery.setDouble("flowDir", flowDir);
155 sqlQuery.setDouble("km", km);
156
157 logger.debug("HYK SQL: " + sqlQuery.getQueryString());
158
159 List<Object[]> results = sqlQuery.list();
160
161 logger.debug("Found " + results.size() + " HYKFormation IDs in DB.");
162
163 if (results == null || results.isEmpty()) {
164 logger.debug("No HYK found for ID " + hykid + " at km " + km);
165 return new ArrayList<HYKFormation>();
166 }
167
168 Object[] resultSet = results.get(0);
169 Integer hykFormationId = (Integer) resultSet[0];
170
171 Query query = session.createQuery("from HYKFormation where id = :id");
172 query.setParameter("id", hykFormationId);
173 query.setMaxResults(1);
174
175 return query.list();
176 }
177
178
179 /** Labeled section. */
180 public static class Zone implements Serializable {
181 /** Lower end of segment. */
182 protected double from;
183 /** Upper end of segment. */
184 protected double to;
185 /** The label. */
186 protected String name;
187
188 /** Constructor for labelled section. */
189 public Zone (double from, double to, String name) {
190 this.from = from;
191 this.to = to;
192 this.name = name;
193 }
194
195 /** Get upper value. */
196 public double getTo() {
197 return to;
198 }
199
200 /** Get lower value. */
201 public double getFrom() {
202 return from;
203 }
204
205 /** Get name (type). */
206 public String getName() {
207 return name;
208 }
209 } // public static class Zone
210 }
211 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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