Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/HYKFactory.java @ 2139:923256599afe

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Somewhat improved hyk handling and rendering. flys-artifacts/trunk@3717 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Thu, 19 Jan 2012 12:52:44 +0000
parents 04b6b6a4564d
children 345a236f7075
rev   line source
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 net.sf.ehcache.Cache;
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9 import net.sf.ehcache.Element;
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10
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11 import org.apache.log4j.Logger;
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12
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13 import org.hibernate.Query;
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14 import org.hibernate.Session;
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15
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16 import de.intevation.flys.model.HYKFormation;
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17 import de.intevation.flys.model.HYKFlowZone;
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18
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19 import de.intevation.flys.artifacts.cache.CacheFactory;
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20
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21 import de.intevation.flys.backend.SessionHolder;
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22
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23
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24 /**
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25 * Factory to access HYKs (hydrographic values).
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26 */
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27 public class HYKFactory
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28 {
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29 private static Logger logger = Logger.getLogger(HYKFactory.class);
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30
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31 public static String HYK_CACHE_NAME = "hykache";
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32
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33
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34 /** Do not instantiate a HYKFactory. */
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35 private HYKFactory() {
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36 }
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37
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38
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39 /**
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40 * Get List of Zones for given river and km.
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41 */
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42 public static Object getHYKs(int hykid, double km) {
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43 logger.debug("HYKFactory.getHYKs");
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44
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45 Cache cache = CacheFactory.getCache(HYK_CACHE_NAME);
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46
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47 String cacheKey;
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48
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49 if (cache != null) {
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50 cacheKey = "" + hykid + "_" + km;
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51 Element element = cache.get(cacheKey);
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52 if (element != null) {
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53 logger.debug("Got hyk from cache");
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54 return (List<Zone>)element.getValue();
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55 }
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56 }
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57 else {
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58 cacheKey = null;
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59 }
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60
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61 List<Zone> zones = getZonesUncached(hykid, km);
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62
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63 if (zones != null && cacheKey != null) {
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64 logger.debug("Store hykzones in cache.");
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65 Element element = new Element(cacheKey, zones);
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66 cache.put(element);
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67 }
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68
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69 return zones;
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70 }
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71
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72
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73 public static String getHykName(int hykid) {
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74 logger.debug("HYKFactory.getHykName " + hykid);
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75
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76 Session session = SessionHolder.HOLDER.get();
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77
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78 // TODO respect interval better. respect multiples (sort, limit),
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79 // TODO respect flow direction of river.
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80 Query query = session.createQuery(
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81 "select description from HYK where id = :hykid ");
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82 query.setParameter("hykid", hykid);
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83
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84 return (String) query.uniqueResult();
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85 }
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86
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87
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88 /**
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89 *
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90 * @param column the position columns value
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91 * @param wst_id database id of the wst
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92 * @return according WKms.
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93 */
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94 // TODO we also need to know the HYK-id to specify which set we are
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95 // inspecting.
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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 // TODO respect interval better. respect multiples (sort, limit),
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105 // TODO respect flow direction of river.
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106 Query query = session.createQuery(
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107 "from HYKFormation where entry.HYK.id = :hykid " +
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108 " and :km between entry.km - cast(distance_vl/1000.0 + 0.001 as big_decimal) and " +
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109 " entry.km + cast(distance_vl/1000.0 + 0.001 as big_decimal)" +
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110 " order by entry.km asc");
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111 query.setParameter("hykid", hykid);
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112 query.setParameter("km", new BigDecimal(km));
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113 logger.debug("Big km " + new BigDecimal(km));
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114 List<HYKFormation> forms = query.list();
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115
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116 List<Zone> zones = new ArrayList<Zone>();
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117 // TODO limit query by one; sensible sorting.
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118 // Take the first one.
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119 if (forms.size() >= 1) {
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120 HYKFormation form = forms.get(0);
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121 // Create respective zones.
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122 for (HYKFlowZone flowZone: form.getZones()) {
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123 Zone z = new Zone(flowZone.getA().doubleValue(),
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124 flowZone.getB().doubleValue(),
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125 flowZone.getType().getName());
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126 zones.add(z);
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127 }
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128 }
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129
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130 return zones;
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131 }
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132
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133 /** Labelled section. */
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134 public static class Zone {
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135 /** Lower end of segment. */
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136 protected double from;
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137 /** Upper end of segment. */
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138 protected double to;
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139 /** The label. */
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140 protected String name;
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141
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142 /** Constructor for labelled section. */
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143 public Zone (double from, double to, String name) {
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144 this.from = from;
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145 this.to = to;
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146 this.name = name;
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147 }
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148
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149 /** Get upper value. */
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150 public double getTo() {
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151 return to;
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152 }
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153
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154 /** Get lower value. */
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155 public double getFrom() {
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156 return from;
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157 }
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158
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159 /** Get name (type). */
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160 public String getName() {
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161 return name;
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162 }
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163 } // public static class Zone
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164 }
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165 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org