Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/SedimentLoadDataFactory.java @ 8089:7e55790da464

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Use list() instead of iterator(). Why does this not work?
author Sascha L. Teichmann <teichmann@intevation.de>
date Fri, 15 Aug 2014 18:01:06 +0200
parents fbe3ba5a480e
children 6f3cf934ae99
rev   line source
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5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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1 /* Copyright (C) 2014 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 package org.dive4elements.river.artifacts.model.minfo;
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9
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10 import java.sql.Timestamp;
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11 import java.util.HashMap;
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7e55790da464 Use list() instead of iterator(). Why does this not work?
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12 import java.util.List;
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13
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14 import net.sf.ehcache.Cache;
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15 import net.sf.ehcache.Element;
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16
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17 import org.apache.log4j.Logger;
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18 import org.dive4elements.river.artifacts.cache.CacheFactory;
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19 import org.dive4elements.river.backend.SessionHolder;
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20 import org.hibernate.SQLQuery;
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21 import org.hibernate.Session;
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22 import org.hibernate.type.StandardBasicTypes;
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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23
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24 public class SedimentLoadDataFactory
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25 {
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26 private static Logger log = Logger.getLogger(SedimentLoadDataFactory.class);
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27
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28 public static final String CACHE_NAME = "sediment-load-data";
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29
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30 public static final String SUSPENDED_STRING = "Schwebstoff";
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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31
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32 public static final String SQL_LOAD_RIVER_SEDIMENT_LOADS =
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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33 "SELECT " +
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34 "sl.id AS sl_id, " +
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fbe3ba5a480e Sediment load: Fetch kind of sediment load from database to tell if it is official or not.
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35 "sl.kind AS sl_kind, " +
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5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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36 "sl.description AS sl_description, " +
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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37 "ti.start_time AS ti_start_time, " +
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38 "ti.stop_time AS ti_stoptime, " +
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39 "slv.value AS slv_value, " +
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40 "gf.name AS gf_name, " +
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41 "ms.id AS ms_id, " +
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42 "ms.station AS ms_station, " +
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43 "ms.measurement_type AS ms_type " +
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44 "FROM sediment_load_values slv " +
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45 "JOIN sediment_load sl ON slv.sediment_load_id = sl.id " +
5e3f4b4fcb28 New way to loaded sediment loads from database and cache it. The data structure a way more straight forward. TODO: Implement calculation on this basis.
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46 "JOIN time_intervals ti ON sl.time_interval_id = ti.id " +
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47 "JOIN grain_fraction gf ON sl.grain_fraction_id = gf.id " +
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48 "JOIN measurement_station ms ON slv.measurement_station_id = ms.id " +
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49 "JOIN rivers r ON ms.river_id = r.id " +
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50 "WHERE r.name = :river " +
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51 "ORDER BY sl.id";
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52
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53 public static final SedimentLoadDataFactory INSTANCE =
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54 new SedimentLoadDataFactory();
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55
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56 private SedimentLoadDataFactory() {
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57 }
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58
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59 public synchronized SedimentLoadData getSedimentLoadData(String river) {
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60 boolean debug = log.isDebugEnabled();
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61
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62 if (debug) {
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63 log.debug(
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64 "Looking for sediment load data for river '" + river + "'");
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65 }
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66
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67 Cache cache = CacheFactory.getCache(CACHE_NAME);
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68
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69 if (cache == null) {
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70 if (debug) {
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71 log.debug("Cache not configured.");
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72 }
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73 return getUncached(river);
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74 }
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75
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76 String key = "sediment-load-" + river;
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77
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78 Element element = cache.get(key);
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79
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80 if (element != null) {
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81 if (debug) {
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82 log.debug("Sediment load data found in cache");
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83 }
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84 return (SedimentLoadData)element.getValue();
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85 }
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87 SedimentLoadData sedimentLoad = getUncached(river);
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88
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89 if (sedimentLoad != null) {
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90 if (debug) {
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91 log.debug("Store sediment load data in cache.");
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92 }
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93 cache.put(new Element(key, sedimentLoad));
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94 }
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95
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96 return sedimentLoad;
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97 }
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98
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99 public SedimentLoadData getUncached(String river) {
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100
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101 Session session = SessionHolder.HOLDER.get();
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102
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103 SQLQuery sqlQuery = session.createSQLQuery(SQL_LOAD_RIVER_SEDIMENT_LOADS)
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104 .addScalar("sl_id", StandardBasicTypes.INTEGER)
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105 .addScalar("sl_kind", StandardBasicTypes.INTEGER)
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106 .addScalar("sl_description", StandardBasicTypes.STRING)
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107 .addScalar("ti_start_time", StandardBasicTypes.TIMESTAMP)
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108 .addScalar("ti_stop_time", StandardBasicTypes.TIMESTAMP)
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109 .addScalar("slv_value", StandardBasicTypes.DOUBLE)
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110 .addScalar("gf_name", StandardBasicTypes.STRING)
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111 .addScalar("ms_id", StandardBasicTypes.INTEGER)
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112 .addScalar("ms_station", StandardBasicTypes.DOUBLE)
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113 .addScalar("ms_type", StandardBasicTypes.STRING);
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114
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115 sqlQuery.setString("river", river);
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116
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117 SedimentLoadData.Load load = null;
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118 int grainFractionIndex = SedimentLoadData.GF_UNKNOWN;
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119
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120 HashMap<Integer, SedimentLoadData.Station> id2station
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121 = new HashMap<Integer, SedimentLoadData.Station>();
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122
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123 List<Object[]> list = sqlQuery.list();
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124
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125 for (Object [] row: list) {
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126
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127 Integer sl_id = (Integer)row[0];
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128 Integer sl_kind = (Integer)row[1];
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129 String sl_description = (String)row[2];
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130 Timestamp ti_start_time = (Timestamp)row[3];
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131 Timestamp ti_stop_time = (Timestamp)row[4];
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132 Double slv_value = (Double)row[5];
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133 String gf_name = (String)row[6];
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134 Integer ms_id = (Integer)row[7];
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135 Double ms_station = (Double)row[8];
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136 String ms_type = (String)row[9];
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137
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138 if (load == null || load.getId() != sl_id) {
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139 load = new SedimentLoadData.Load(
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140 sl_id, sl_kind, sl_description,
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141 ti_start_time, ti_stop_time);
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142
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143 // Grain fractions only change when a new sediment load starts.
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144 grainFractionIndex =
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145 SedimentLoadData.grainFractionIndex(gf_name);
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146
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147 if (grainFractionIndex == SedimentLoadData.GF_UNKNOWN) {
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148 log.error("Unknown grain fraction type: " + gf_name);
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149 break;
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150 }
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151 }
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152
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153 SedimentLoadData.Station station = id2station.get(ms_id);
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154 if (station == null) {
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155 int type = ms_type.equalsIgnoreCase(SUSPENDED_STRING)
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156 ? SedimentLoadData.Station.SUSPENDED
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157 : SedimentLoadData.Station.BED_LOAD;
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158
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159 station = new SedimentLoadData.Station(type, ms_station);
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160 id2station.put(ms_id, station);
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161 }
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162
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163 station.addValue(
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164 grainFractionIndex,
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165 new SedimentLoadData.Value(load, slv_value));
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166 }
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167
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168 SedimentLoadData sld = new SedimentLoadData(id2station.values());
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169
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170 return sld;
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171 }
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172 }
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173 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org