Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/HYKFactory.java @ 2148:345a236f7075
Made HYKFactory.Zone Serializable (and thus cachable).
flys-artifacts/trunk@3730 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Fri, 20 Jan 2012 08:30:07 +0000 |
parents | 923256599afe |
children | 8c9c40459d8f |
rev | line source |
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2131
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1 package de.intevation.flys.artifacts.model; |
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2 |
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3 import java.util.ArrayList; |
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4 import java.util.List; |
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5 |
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6 import java.math.BigDecimal; |
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7 |
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8 import java.io.Serializable; |
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9 |
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10 import net.sf.ehcache.Cache; |
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11 import net.sf.ehcache.Element; |
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12 |
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13 import org.apache.log4j.Logger; |
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14 |
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15 import org.hibernate.Query; |
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16 import org.hibernate.Session; |
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17 |
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18 import de.intevation.flys.model.HYKFormation; |
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19 import de.intevation.flys.model.HYKFlowZone; |
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20 |
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21 import de.intevation.flys.artifacts.cache.CacheFactory; |
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22 |
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23 import de.intevation.flys.backend.SessionHolder; |
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24 |
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25 |
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26 /** |
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27 * Factory to access HYKs (hydrographic values). |
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28 */ |
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29 public class HYKFactory |
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30 { |
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31 private static Logger logger = Logger.getLogger(HYKFactory.class); |
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32 |
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33 public static String HYK_CACHE_NAME = "hykache"; |
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34 |
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35 |
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36 /** Do not instantiate a HYKFactory. */ |
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37 private HYKFactory() { |
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38 } |
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39 |
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40 |
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41 /** |
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42 * Get List of Zones for given river and km. |
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43 */ |
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44 public static Object getHYKs(int hykid, double km) { |
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45 logger.debug("HYKFactory.getHYKs"); |
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46 |
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47 Cache cache = CacheFactory.getCache(HYK_CACHE_NAME); |
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48 |
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49 String cacheKey; |
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50 |
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51 if (cache != null) { |
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52 cacheKey = "" + hykid + "_" + km; |
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53 Element element = cache.get(cacheKey); |
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54 if (element != null) { |
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55 logger.debug("Got hyk from cache"); |
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56 return (List<Zone>)element.getValue(); |
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57 } |
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58 } |
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59 else { |
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60 cacheKey = null; |
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61 } |
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62 |
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63 List<Zone> zones = getZonesUncached(hykid, km); |
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64 |
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65 if (zones != null && cacheKey != null) { |
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66 logger.debug("Store hykzones in cache."); |
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67 Element element = new Element(cacheKey, zones); |
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68 cache.put(element); |
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69 } |
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70 |
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71 return zones; |
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72 } |
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73 |
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74 |
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75 public static String getHykName(int hykid) { |
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76 logger.debug("HYKFactory.getHykName " + hykid); |
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77 |
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78 Session session = SessionHolder.HOLDER.get(); |
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79 |
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80 // TODO respect interval better. respect multiples (sort, limit), |
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81 // TODO respect flow direction of river. |
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82 Query query = session.createQuery( |
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83 "select description from HYK where id = :hykid "); |
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84 query.setParameter("hykid", hykid); |
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85 |
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86 return (String) query.uniqueResult(); |
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87 } |
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88 |
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89 |
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90 /** |
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91 * |
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92 * @param column the position columns value |
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93 * @param wst_id database id of the wst |
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94 * @return according WKms. |
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95 */ |
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96 // TODO we also need to know the HYK-id to specify which set we are |
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97 // inspecting. |
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98 public static List<Zone> getZonesUncached(int hykid, double km) { |
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99 |
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100 if (logger.isDebugEnabled()) { |
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101 logger.debug("HYKFactory.getZoneUncached " + hykid + " km " + km); |
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102 } |
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103 |
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104 Session session = SessionHolder.HOLDER.get(); |
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105 |
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106 // TODO respect interval better. respect multiples (sort, limit), |
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107 // TODO respect flow direction of river. |
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108 Query query = session.createQuery( |
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109 "from HYKFormation where entry.HYK.id = :hykid " + |
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110 " and :km between entry.km - cast(distance_vl/1000.0 + 0.001 as big_decimal) and " + |
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111 " entry.km + cast(distance_vl/1000.0 + 0.001 as big_decimal)" + |
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112 " order by entry.km asc"); |
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113 query.setParameter("hykid", hykid); |
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114 query.setParameter("km", new BigDecimal(km)); |
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115 |
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116 List<HYKFormation> forms = query.list(); |
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117 |
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118 List<Zone> zones = new ArrayList<Zone>(); |
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119 // TODO limit query by one; sensible sorting. |
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120 // Take the first one. |
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121 if (forms.size() >= 1) { |
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122 HYKFormation form = forms.get(0); |
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123 // Create respective zones. |
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124 for (HYKFlowZone flowZone: form.getZones()) { |
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125 Zone z = new Zone(flowZone.getA().doubleValue(), |
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126 flowZone.getB().doubleValue(), |
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127 flowZone.getType().getName()); |
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128 zones.add(z); |
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129 } |
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130 } |
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131 |
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132 return zones; |
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133 } |
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134 |
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135 /** Labelled section. */ |
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136 public static class Zone implements Serializable { |
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137 /** Lower end of segment. */ |
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138 protected double from; |
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139 /** Upper end of segment. */ |
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140 protected double to; |
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141 /** The label. */ |
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142 protected String name; |
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143 |
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144 /** Constructor for labelled section. */ |
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145 public Zone (double from, double to, String name) { |
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146 this.from = from; |
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147 this.to = to; |
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148 this.name = name; |
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149 } |
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150 |
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151 /** Get upper value. */ |
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152 public double getTo() { |
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153 return to; |
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154 } |
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155 |
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156 /** Get lower value. */ |
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157 public double getFrom() { |
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158 return from; |
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159 } |
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160 |
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161 /** Get name (type). */ |
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162 public String getName() { |
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163 return name; |
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164 } |
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165 } // public static class Zone |
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166 } |
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167 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |