Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/FixingsColumnFactory.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children af13ceeba52a
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.model;
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10
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11 import org.dive4elements.river.artifacts.model.FixingsOverview.Fixing;
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12
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13 import org.dive4elements.river.artifacts.cache.CacheFactory;
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14
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15 import org.dive4elements.river.backend.SessionHolder;
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16
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17 import java.util.List;
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18
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19 import net.sf.ehcache.Cache;
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20 import net.sf.ehcache.Element;
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21
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22 import org.hibernate.Session;
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23 import org.hibernate.SQLQuery;
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24
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25 import org.hibernate.type.StandardBasicTypes;
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26
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27 import org.apache.log4j.Logger;
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28
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29 public class FixingsColumnFactory
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30 {
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31 private static Logger log = Logger.getLogger(FixingsColumnFactory.class);
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32
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33 public static final String CACHE_NAME = "fixings-columns";
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34
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35 public static final String SQL_COLUMN_WS =
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36 "SELECT wcv.position AS km, wcv.w AS w " +
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37 "FROM wst_column_values wcv " +
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38 "WHERE wst_column_id = :column_id " +
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39 "ORDER by wcv.position";
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40
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41 public static final String SQL_COLUMN_QS =
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42 "SELECT wqr.q AS q, r.a AS a, r.b AS b " +
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43 "FROM wst_column_q_ranges wcqr " +
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44 "JOIN wst_q_ranges wqr ON wcqr.wst_q_range_id = wqr.id " +
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45 "JOIN ranges r ON wqr.range_id = r.id " +
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46 "WHERE wcqr.wst_column_id = :column_id ORDER by r.a";
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47
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48 public static final FixingsColumnFactory INSTANCE =
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49 new FixingsColumnFactory();
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50
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51 private FixingsColumnFactory() {
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52 }
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53
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54 public static FixingsColumnFactory getInstance() {
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55 return INSTANCE;
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56 }
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57
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58 public FixingsColumn getColumnData(Fixing.Column column) {
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59
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60 boolean debug = log.isDebugEnabled();
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61
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62 if (debug) {
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63 log.debug("FixingsColumnFactory.getColumnData");
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64 }
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65
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66 Cache cache = CacheFactory.getCache(CACHE_NAME);
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67
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68 if (cache == null) {
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69 if (debug) {
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70 log.debug("Cache unconfigured.");
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71 }
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72 return getUncached(column);
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73 }
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74
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75 Integer cacheKey = Integer.valueOf(column.getId());
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76 Element element = cache.get(cacheKey);
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77
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78 if (element != null) {
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79 if (debug) {
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80 log.debug("Column " + cacheKey + " found in cache.");
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81 }
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82 return (FixingsColumn)element.getValue();
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83 }
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84 else {
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85 FixingsColumn result = getUncached(column);
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86 if (result != null) {
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87 if (debug) {
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88 log.debug("Store column " + cacheKey + " into cache.");
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89 }
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90 cache.put(new Element(cacheKey, result));
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91 }
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92 return result;
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93 }
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94 }
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95
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96 protected FixingsColumn getUncached(Fixing.Column column) {
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97 Session session = SessionHolder.HOLDER.get();
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98
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99 SQLQuery sqlQuery = session.createSQLQuery(SQL_COLUMN_WS)
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100 .addScalar("km", StandardBasicTypes.DOUBLE)
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101 .addScalar("w", StandardBasicTypes.DOUBLE);
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102
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103 sqlQuery.setInteger("column_id", column.getId());
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104
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105 List<Object []> results = sqlQuery.list();
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106
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107 if (results.isEmpty()) {
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108 return null;
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109 }
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110
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111 double [] kms = new double[results.size()];
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112 double [] ws = new double[kms.length];
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113
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114 for (int i = 0; i < kms.length; ++i) {
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115 Object [] row = results.get(i);
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116 kms[i] = ((Double)row[0]).doubleValue();
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117 ws [i] = ((Double)row[1]).doubleValue();
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118 }
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119
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120 sqlQuery = session.createSQLQuery(SQL_COLUMN_QS)
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121 .addScalar("q", StandardBasicTypes.DOUBLE)
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122 .addScalar("a", StandardBasicTypes.DOUBLE)
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123 .addScalar("b", StandardBasicTypes.DOUBLE);
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124
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125 sqlQuery.setInteger("column_id", column.getId());
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126
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127 results = sqlQuery.list();
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128
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129 if (results.isEmpty()) {
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130 return null;
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131 }
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132
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133 QRangeTree qs = new QRangeTree(
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134 results, QRangeTree.WITHOUT_COLUMN, 0, results.size());
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135
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136 return new FixingsColumn(kms, ws, qs);
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137 }
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138 }
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139 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org