Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/HYKFactory.java @ 2220:f31d92060f21
Added reference curve facet type.
flys-artifacts/trunk@3860 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 01 Feb 2012 13:56:38 +0000 |
parents | 8c9c40459d8f |
children | 98a350bb91a9 |
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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.HYK; |
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19 import de.intevation.flys.model.HYKFormation; |
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20 import de.intevation.flys.model.HYKFlowZone; |
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21 |
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22 import de.intevation.flys.artifacts.cache.CacheFactory; |
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23 |
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24 import de.intevation.flys.backend.SessionHolder; |
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25 |
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26 |
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27 /** |
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28 * Factory to access HYKs (hydrographic values). |
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29 */ |
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30 public class HYKFactory |
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31 { |
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32 private static Logger logger = Logger.getLogger(HYKFactory.class); |
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33 |
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34 public static String HYK_CACHE_NAME = "hykache"; |
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35 |
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36 |
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37 /** Do not instantiate a HYKFactory. */ |
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38 private HYKFactory() { |
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39 } |
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40 |
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41 |
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42 /** |
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43 * Get List of Zones for given river and km. |
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44 */ |
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45 public static Object getHYKs(int hykid, double km) { |
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46 logger.debug("HYKFactory.getHYKs"); |
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47 |
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48 Cache cache = CacheFactory.getCache(HYK_CACHE_NAME); |
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49 |
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50 String cacheKey; |
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51 |
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52 if (cache != null) { |
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53 cacheKey = "" + hykid + "_" + km; |
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54 Element element = cache.get(cacheKey); |
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55 if (element != null) { |
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56 logger.debug("Got hyk from cache"); |
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57 return (List<Zone>)element.getValue(); |
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58 } |
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59 } |
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60 else { |
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61 cacheKey = null; |
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62 } |
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63 |
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64 List<Zone> zones = getZonesUncached(hykid, km); |
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65 |
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66 if (zones != null && cacheKey != null) { |
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67 logger.debug("Store hykzones in cache."); |
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68 Element element = new Element(cacheKey, zones); |
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69 cache.put(element); |
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70 } |
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71 |
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72 return zones; |
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73 } |
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74 |
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75 |
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76 /** Return name for hyk with given id. */ |
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77 public static String getHykName(int hykid) { |
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78 logger.debug("HYKFactory.getHykName " + hykid); |
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79 |
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80 Session session = SessionHolder.HOLDER.get(); |
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81 |
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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 * Ask DB for hyk zones. |
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92 * @param hykid ID of the 'main' HYK to query. |
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93 * @param km for which to get the hyk-zones. |
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94 * @return according zones. |
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95 */ |
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96 public static List<Zone> getZonesUncached(int hykid, double km) { |
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97 |
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98 if (logger.isDebugEnabled()) { |
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99 logger.debug("HYKFactory.getZoneUncached " + hykid + " km " + km); |
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100 } |
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101 |
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102 Session session = SessionHolder.HOLDER.get(); |
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103 |
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104 // Find out flow-direction of river. |
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105 // OPTIMIZE: 1) query kmUp directly 2) merge queries. |
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106 Query rQuery = session.createQuery("from HYK where id = :hykid"); |
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107 rQuery.setParameter("hykid", hykid); |
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108 rQuery.setMaxResults(1); |
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109 HYK hyk = (HYK) rQuery.uniqueResult(); |
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110 BigDecimal flowDir = (hyk.getRiver().getKmUp()) ? new BigDecimal(1) : new BigDecimal(-1); |
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111 |
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112 // Query HYKFormations in range. |
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113 Query query = session.createQuery( |
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114 "from HYKFormation where entry.HYK.id = :hykid " + |
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115 " and :km between entry.km and " + |
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116 " entry.km + :flowDir * "+ |
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117 " cast(distance_vl/1000.0 + 0.001 as big_decimal)" + |
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118 " order by entry.km asc"); |
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119 query.setParameter("hykid", hykid); |
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120 query.setParameter("km", new BigDecimal(km)); |
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121 query.setParameter("flowDir", flowDir); |
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122 query.setMaxResults(1); |
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123 |
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124 List<HYKFormation> forms = query.list(); |
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125 |
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126 List<Zone> zones = new ArrayList<Zone>(); |
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127 |
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128 // Take the first one. |
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129 if (forms.size() >= 1) { |
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130 HYKFormation form = forms.get(0); |
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131 // Create respective zones. |
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132 for (HYKFlowZone flowZone: form.getZones()) { |
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133 Zone z = new Zone(flowZone.getA().doubleValue(), |
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134 flowZone.getB().doubleValue(), |
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135 flowZone.getType().getName()); |
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136 zones.add(z); |
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137 } |
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138 } |
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139 |
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140 return zones; |
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141 } |
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142 |
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143 /** Labelled section. */ |
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144 public static class Zone implements Serializable { |
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145 /** Lower end of segment. */ |
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146 protected double from; |
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147 /** Upper end of segment. */ |
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148 protected double to; |
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149 /** The label. */ |
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150 protected String name; |
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151 |
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152 /** Constructor for labelled section. */ |
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153 public Zone (double from, double to, String name) { |
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154 this.from = from; |
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155 this.to = to; |
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156 this.name = name; |
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157 } |
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158 |
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159 /** Get upper value. */ |
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160 public double getTo() { |
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161 return to; |
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162 } |
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163 |
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164 /** Get lower value. */ |
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165 public double getFrom() { |
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166 return from; |
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167 } |
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168 |
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169 /** Get name (type). */ |
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170 public String getName() { |
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171 return name; |
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172 } |
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173 } // public static class Zone |
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174 } |
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175 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |