Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/WKmsFactory.java @ 6525:ed81479cde10
MainValuesWFacet: Fetch the gauge-respecting mainvalues if in a navigable chart
setting.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Tue, 02 Jul 2013 07:11:59 +0200 |
parents | af13ceeba52a |
children | 7484132b2fbb |
rev | line source |
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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 : |