Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/WKmsFactory.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.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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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 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
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18 import org.hibernate.Session;
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19
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20 import org.hibernate.SQLQuery;
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21 import org.hibernate.type.StandardBasicTypes;
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22
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23 import org.dive4elements.river.artifacts.cache.CacheFactory;
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24
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25 import org.dive4elements.river.backend.SessionHolder;
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26
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27
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28 /**
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29 * Factory to access ready-made WKms for other (than computed) 'kinds' of
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30 * WST-data.
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31 */
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32 public class WKmsFactory
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33 {
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34 /** Private logger to use here. */
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35 private static Logger log = Logger.getLogger(WKmsFactory.class);
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36
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37 /** Query to get km and ws for wst_id and column_pos. */
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38 public static final String SQL_SELECT_WS =
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39 "SELECT km, w FROM wst_w_values " +
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40 "WHERE wst_id = :wst_id AND column_pos = :column_pos";
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41
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42 /** Query to get name for wst_id and column_pos. */
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43 public static final String SQL_SELECT_NAME =
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44 "SELECT name " +
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45 "FROM wst_columns "+
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46 "WHERE wst_id = :wst_id AND position = :column_pos";
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47
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48 /** Query to get name (description) for wst_id. */
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49 public static final String SQL_SELECT_WST_NAME =
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50 "SELECT description from wsts "+
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51 "WHERE id = :wst_id";
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52
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53
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54 private WKmsFactory() {
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55 }
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56
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57
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58 /**
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59 * Get WKms for given column and wst_id, caring about the cache.
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60 */
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61 public static WKms getWKms(int column, int wst_id) {
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62 log.debug("WKmsFactory.getWKms");
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63 Cache cache = CacheFactory.getCache(StaticWKmsCacheKey.CACHE_NAME);
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64
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65 StaticWKmsCacheKey cacheKey;
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66
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67 if (cache != null) {
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68 cacheKey = new StaticWKmsCacheKey(wst_id, column);
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69 Element element = cache.get(cacheKey);
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70 if (element != null) {
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71 log.debug("Got static wst values from cache");
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72 return (WKms)element.getValue();
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73 }
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74 }
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75 else {
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76 cacheKey = null;
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77 }
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78
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79 WKms values = getWKmsUncached(column, wst_id);
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80
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81 if (values != null && cacheKey != null) {
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82 log.debug("Store static wst values in cache.");
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83 Element element = new Element(cacheKey, values);
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84 cache.put(element);
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85 }
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86 return values;
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87 }
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88
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89 /** Get name for a WKms. */
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90 public static String getWKmsName(int wst_id) {
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91 log.debug("WKmsFactory.getWKmsName wst_id/" + wst_id);
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92
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93 String name = null;
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94 Session session = SessionHolder.HOLDER.get();
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95
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96 SQLQuery nameQuery = session.createSQLQuery(SQL_SELECT_WST_NAME)
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97 .addScalar("description", StandardBasicTypes.STRING);
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98 nameQuery.setInteger("wst_id", wst_id);
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99
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100 List<String> names = nameQuery.list();
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101 if (names.size() >= 1) {
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102 name = names.get(0);
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103 }
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104
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105 return name;
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106 }
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107
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108 /** Get name for a WKms. */
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109 public static String getWKmsName(int column, int wst_id) {
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110 log.debug("WKmsFactory.getWKmsName c/" + column + ", wst_id/" + wst_id);
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111
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112 String name = null;
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113 Session session = SessionHolder.HOLDER.get();
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114
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115 SQLQuery nameQuery = session.createSQLQuery(SQL_SELECT_NAME)
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116 .addScalar("name", StandardBasicTypes.STRING);
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117 nameQuery.setInteger("wst_id", wst_id);
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118 nameQuery.setInteger("column_pos", column);
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119
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120 List<String> names = nameQuery.list();
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121 if (names.size() >= 1) {
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122 name = names.get(0);
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123 }
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124
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125 return name;
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126 }
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127
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128
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129 /**
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130 * Get WKms from db.
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131 * @param column the position columns value
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132 * @param wst_id database id of the wst
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133 * @return according WKms.
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134 */
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135 public static WKms getWKmsUncached(int column, int wst_id) {
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136
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137 if (log.isDebugEnabled()) {
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138 log.debug("WKmsFactory.getWKmsUncached c/" + column + ", wst_id/" + wst_id);
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139 }
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140
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141 WKmsImpl wkms = new WKmsImpl(getWKmsName(column, wst_id));
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142
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143 Session session = SessionHolder.HOLDER.get();
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144 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS)
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145 .addScalar("km", StandardBasicTypes.DOUBLE)
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146 .addScalar("w", StandardBasicTypes.DOUBLE);
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147 sqlQuery.setInteger("wst_id", wst_id);
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148 sqlQuery.setInteger("column_pos", column);
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149
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150 List<Object []> results = sqlQuery.list();
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151
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152 for (int i = 0, N = results.size(); i < N; i++) {
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153 Object[] row = results.get(i);
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154 wkms.add((Double) row[0], (Double) row[1]);
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155 }
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156
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157 return wkms;
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158 }
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159 }
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160 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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