Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentDensityFactory.java @ 7219:13f0bdeb2b47

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issue1435: SedimentDensityFactory: Changed variable name of query to reflect purpose better, added query and method to find description of density by its id.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 01 Oct 2013 10:03:20 +0200
parents 8079e3ba31c9
children 349730f8a49f
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
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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.minfo;
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10
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11 import java.util.List;
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12
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13 import net.sf.ehcache.Cache;
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14 import net.sf.ehcache.Element;
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15
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16 import org.apache.log4j.Logger;
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17 import org.hibernate.SQLQuery;
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18 import org.hibernate.Session;
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19 import org.hibernate.type.StandardBasicTypes;
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20
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21 import org.dive4elements.river.artifacts.cache.CacheFactory;
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22 import org.dive4elements.river.backend.SessionHolder;
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23
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24
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25 public class SedimentDensityFactory
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26 {
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27 /** Private logger to use here. */
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28 private static Logger log = Logger.getLogger(SedimentDensityFactory.class);
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29
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30 private static final String DENSITY_CACHE_NAME = "sedimentdensity";
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31
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32 /** Query to get sediment density values and kms. */
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33 private static final String SQL_SELECT_DENSITY =
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34 "SELECT sdv.station AS km, " +
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35 " sdv.density AS density," +
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36 " sdv.year AS year " +
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37 " FROM sediment_density sd" +
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38 " JOIN rivers r ON sd.river_id = r.id " +
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39 " JOIN sediment_density_values sdv ON sd.id = sdv.sediment_density_id" +
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40 " WHERE r.name = :name";
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41
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42 /** Query to get sediment density values and kms by id. */
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43 private static final String SQL_SELECT_DENSITY_BY_ID =
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44 "SELECT sdv.station AS km, " +
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45 " sdv.density AS density," +
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46 " sdv.year AS year " +
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47 " FROM sediment_density sd" +
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48 " JOIN sediment_density_values sdv ON sd.id = sdv.sediment_density_id" +
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8079e3ba31c9 SedimentDensityFactory: query densities by id only (not year).
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49 " WHERE sd.id = :id";
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50
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51 /** Query to get sediment density description by id. */
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52 private static final String SQL_SELECT_DESCRIPTION_BY_ID =
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53 "SELECT sd.description " +
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54 " FROM sediment_density sd" +
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55 " WHERE sd.id = :id";
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56
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57 private SedimentDensityFactory() {}
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58
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59 public static SedimentDensity getSedimentDensity(
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60 String river,
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61 double startKm,
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62 double endKm,
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63 int year
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64 ) {
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65 log.debug("getSedimentDensity");
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66 Cache cache = CacheFactory.getCache(DENSITY_CACHE_NAME);
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67
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68 if (cache == null) {
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69 log.debug("Cache not configured.");
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70 return getSedimentDensityUncached(river, startKm, endKm, year);
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71 }
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72
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73 String key = river + startKm + endKm;
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74 Element element = cache.get(key);
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75 if (element != null) {
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76 log.debug("SedimentDensity found in cache!");
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77 return (SedimentDensity)element.getValue();
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78 }
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79 SedimentDensity value =
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80 getSedimentDensityUncached(river, startKm, endKm, year);
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81
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82 if (value != null && key != null) {
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83 log.debug("Store sediment density values in cache.");
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84 element = new Element(key, value);
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85 cache.put(element);
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86 }
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87 return value;
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88 }
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89
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90 private static SedimentDensity getSedimentDensityUncached(
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91 String river,
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92 double startKm,
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93 double endKm,
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94 int year
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95 ) {
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96 log.debug("getSedimentDensityUncached");
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97 Session session = SessionHolder.HOLDER.get();
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98 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_DENSITY)
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99 .addScalar("km", StandardBasicTypes.DOUBLE)
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100 .addScalar("density", StandardBasicTypes.DOUBLE)
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101 .addScalar("year", StandardBasicTypes.INTEGER);
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102 sqlQuery.setString("name", river);
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103 List<Object[]> results = sqlQuery.list();
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104 SedimentDensity density = new SedimentDensity();
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105 for (Object[] row : results) {
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106 if (row[0] != null && row[1] != null && row[2] != null) {
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107 density.addDensity((Double)row[0], (Double)row[1], (Integer)row[2]);
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108 }
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109 }
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110
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111 density.cleanUp();
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112 return density;
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113 }
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114
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115 public static String getSedimentDensityDescription(int id) {
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116 log.debug("getSedimentDensityDescription");
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117 Session session = SessionHolder.HOLDER.get();
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118 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_DESCRIPTION_BY_ID)
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119 .addScalar("description", StandardBasicTypes.STRING);
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120 sqlQuery.setInteger("id", id);
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121 List<Object> results = sqlQuery.list();
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122
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123 return (String) results.get(0);
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124 }
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125
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126 public static SedimentDensity getSedimentDensityUncached(
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127 int id
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128 ) {
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129 log.debug("getSedimentDensityUncached id/year");
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130 Session session = SessionHolder.HOLDER.get();
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131 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_DENSITY_BY_ID)
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132 .addScalar("km", StandardBasicTypes.DOUBLE)
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133 .addScalar("density", StandardBasicTypes.DOUBLE)
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134 .addScalar("year", StandardBasicTypes.INTEGER);
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135 sqlQuery.setInteger("id", id);
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136 List<Object[]> results = sqlQuery.list();
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137 SedimentDensity density = new SedimentDensity();
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138 for (Object[] row : results) {
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139 if (row[0] != null && row[1] != null && row[2] != null) {
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140 density.addDensity((Double)row[0], (Double)row[1], (Integer)row[2]);
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141 }
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142 }
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143
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144 density.cleanUp();
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145 return density;
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146 }
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147 }
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148 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org