Mercurial > dive4elements > river

comparison backend/src/main/java/org/dive4elements/river/importer/ImportCrossSectionLine.java @ 5838:5aa05a7a34b7

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Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-backend/src/main/java/org/dive4elements/river/importer/ImportCrossSectionLine.java@18619c1e7c2a
children 4dd33b86dc61
comparison
equal deleted inserted replaced
5837:d9901a08d0a6 5838:5aa05a7a34b7
1 package org.dive4elements.river.importer;
2
3 import org.dive4elements.river.model.CrossSection;
4 import org.dive4elements.river.model.CrossSectionPoint;
5 import org.dive4elements.river.model.CrossSectionLine;
6
7 import org.hibernate.Session;
8 import org.hibernate.Query;
9
10 import java.util.List;
11 import java.util.Comparator;
12 import java.util.Map;
13 import java.util.TreeMap;
14
15 /**
16 * A CrossSectionLine (containing points) ready to be transformed into a mapped
17 * object and written to db (used in importer).
18 */
19 public class ImportCrossSectionLine
20 {
21 public static final Comparator<CrossSectionPoint> INDEX_CMP =
22 new Comparator<CrossSectionPoint>() {
23 public int compare(CrossSectionPoint a, CrossSectionPoint b) {
24 return a.getColPos().compareTo(b.getColPos());
25 }
26 };
27
28 protected Double km;
29 protected ImportCrossSection crossSection;
30 protected List<XY> points;
31
32 protected CrossSectionLine peer;
33
34 public ImportCrossSectionLine() {
35 }
36
37 public ImportCrossSectionLine(Double km, List<XY> points) {
38 this.km = km;
39 this.points = points;
40 }
41
42 public ImportCrossSection getCrossSection() {
43 return crossSection;
44 }
45
46 public void setCrossSection(ImportCrossSection crossSection) {
47 this.crossSection = crossSection;
48 }
49
50 public Double getKm() {
51 return km;
52 }
53
54 public void setKm(Double km) {
55 this.km = km;
56 }
57
58 public void storeDependencies() {
59 storePoints();
60 }
61
62
63 /** Write a line and its points. */
64 protected void storePoints() {
65 CrossSectionLine csl = getPeer();
66
67 Map<CrossSectionPoint, CrossSectionPoint> map =
68 new TreeMap<CrossSectionPoint, CrossSectionPoint>(INDEX_CMP);
69
70 // Build index for faster (index) collision lookup.
71 List<CrossSectionPoint> ps = csl.getPoints();
72 if (ps != null) {
73 for (CrossSectionPoint point: ps) {
74 map.put(point, point);
75 }
76 }
77
78 Session session =
79 ImporterSession.getInstance().getDatabaseSession();
80
81 CrossSectionPoint key = new CrossSectionPoint();
82
83 // Somehow it looks as if even with the map it is still possible that
84 // multiple points with same id enter hibernate (and then violate a
85 // constraint). -> TODO
86 for (XY xy: points) {
87 key.setColPos(xy.getIndex());
88 CrossSectionPoint csp = map.get(key);
89 if (csp == null) { // create new
90 csp = new CrossSectionPoint(
91 csl, key.getColPos(),
92 Double.valueOf(xy.getX()),
93 Double.valueOf(xy.getY()));
94 }
95 else { // update old
96 csp.setX(Double.valueOf(xy.getX()));
97 csp.setY(Double.valueOf(xy.getY()));
98 }
99 session.save(csp);
100 }
101 }
102
103 public CrossSectionLine getPeer() {
104 if (peer == null) {
105 CrossSection cs = crossSection.getPeer();
106
107 Session session =
108 ImporterSession.getInstance().getDatabaseSession();
109
110 Query query = session.createQuery(
111 "from CrossSectionLine where crossSection=:cs and km=:km");
112 query.setParameter("cs", cs);
113 query.setParameter("km", km);
114
115 List<CrossSectionLine> lines = query.list();
116 if (lines.isEmpty()) {
117 peer = new CrossSectionLine(cs, km);
118 session.save(peer);
119 }
120 else {
121 peer = lines.get(0);
122 }
123 }
124 return peer;
125 }
126 }
127 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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