Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FixingsColumnFactory.java @ 4187:21f4e4b79121

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Refactor GaugeDischargeCurveFacet to be able to set a facet name For adding another output of the GaugeDischargeCurveArtifact it is necessary to provide to facet instances with different names. Therefore the GaugeDischargeCurveFacet is extended to set the facet name in the constructor.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 19 Oct 2012 13:25:49 +0200
parents a441be7f1589
children
rev   line source
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1 package de.intevation.flys.artifacts.model;
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2
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3 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing;
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5 import de.intevation.flys.artifacts.cache.CacheFactory;
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6
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7 import de.intevation.flys.backend.SessionHolder;
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8
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9 import java.util.List;
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10
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11 import net.sf.ehcache.Cache;
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12 import net.sf.ehcache.Element;
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13
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14 import org.hibernate.Session;
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15 import org.hibernate.SQLQuery;
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16
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17 import org.hibernate.type.StandardBasicTypes;
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19 import org.apache.log4j.Logger;
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20
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21 public class FixingsColumnFactory
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22 {
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23 private static Logger log = Logger.getLogger(FixingsColumnFactory.class);
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24
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25 public static final String CACHE_NAME = "fixings-columns";
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26
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27 public static final String SQL_COLUMN_WS =
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28 "SELECT wcv.position AS km, wcv.w AS w " +
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29 "FROM wst_column_values wcv " +
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30 "WHERE wst_column_id = :column_id " +
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31 "ORDER by wcv.position";
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32
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33 public static final String SQL_COLUMN_QS =
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34 "SELECT wqr.q AS q, r.a AS a, r.b AS b " +
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35 "FROM wst_column_q_ranges wcqr " +
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36 "JOIN wst_q_ranges wqr ON wcqr.wst_q_range_id = wqr.id " +
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37 "JOIN ranges r ON wqr.range_id = r.id " +
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38 "WHERE wcqr.wst_column_id = :column_id ORDER by r.a";
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39
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40 public static final FixingsColumnFactory INSTANCE =
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41 new FixingsColumnFactory();
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42
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43 private FixingsColumnFactory() {
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44 }
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45
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46 public static FixingsColumnFactory getInstance() {
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47 return INSTANCE;
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48 }
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49
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50 public FixingsColumn getColumnData(Fixing.Column column) {
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51
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52 boolean debug = log.isDebugEnabled();
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53
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54 if (debug) {
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55 log.debug("FixingsColumnFactory.getColumnData");
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56 }
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57
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58 Cache cache = CacheFactory.getCache(CACHE_NAME);
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59
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60 if (cache == null) {
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61 if (debug) {
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62 log.debug("Cache unconfigured.");
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63 }
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64 return getUncached(column);
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65 }
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66
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67 Integer cacheKey = Integer.valueOf(column.getId());
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68 Element element = cache.get(cacheKey);
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69
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70 if (element != null) {
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71 if (debug) {
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72 log.debug("Column " + cacheKey + " found in cache.");
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73 }
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74 return (FixingsColumn)element.getValue();
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75 }
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76 else {
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77 FixingsColumn result = getUncached(column);
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78 if (result != null) {
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79 if (debug) {
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80 log.debug("Store column " + cacheKey + " into cache.");
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81 }
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82 cache.put(new Element(cacheKey, result));
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83 }
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84 return result;
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85 }
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86 }
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87
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88 protected FixingsColumn getUncached(Fixing.Column column) {
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89 Session session = SessionHolder.HOLDER.get();
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90
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91 SQLQuery sqlQuery = session.createSQLQuery(SQL_COLUMN_WS)
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92 .addScalar("km", StandardBasicTypes.DOUBLE)
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93 .addScalar("w", StandardBasicTypes.DOUBLE);
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94
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95 sqlQuery.setInteger("column_id", column.getId());
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96
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97 List<Object []> results = sqlQuery.list();
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98
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99 if (results.isEmpty()) {
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100 return null;
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101 }
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102
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103 double [] kms = new double[results.size()];
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104 double [] ws = new double[kms.length];
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105
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106 for (int i = 0; i < kms.length; ++i) {
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107 Object [] row = results.get(i);
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108 kms[i] = ((Double)row[0]).doubleValue();
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109 ws [i] = ((Double)row[1]).doubleValue();
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110 }
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111
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112 sqlQuery = session.createSQLQuery(SQL_COLUMN_QS)
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113 .addScalar("q", StandardBasicTypes.DOUBLE)
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114 .addScalar("a", StandardBasicTypes.DOUBLE)
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115 .addScalar("b", StandardBasicTypes.DOUBLE);
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116
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117 sqlQuery.setInteger("column_id", column.getId());
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118
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119 results = sqlQuery.list();
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120
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121 if (results.isEmpty()) {
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122 return null;
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parents: 2619
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123 }
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124
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125 QRangeTree qs = new QRangeTree(
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126 results, QRangeTree.WITHOUT_COLUMN, 0, results.size());
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127
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128 return new FixingsColumn(kms, ws, qs);
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129 }
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130 }
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131 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org