Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/BedHeightFactory.java @ 8648:cd5e0662f75c
(issue1754) Handle a>b in static BedHeight facets.
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Mon, 30 Mar 2015 19:29:31 +0200 |
parents | 17a3030bbda2 |
children | 5e38e2924c07 |
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.minfo; |
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10 |
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11 |
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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.hibernate.SQLQuery; |
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19 import org.hibernate.Session; |
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20 import org.hibernate.type.StandardBasicTypes; |
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21 |
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22 import org.dive4elements.river.artifacts.cache.CacheFactory; |
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23 import org.dive4elements.river.backend.SessionHolder; |
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24 |
6765 | 25 |
26 /** Create BedHeights from database. */ | |
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27 public class BedHeightFactory { |
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28 /** Private log to use here. */ |
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29 private static Logger log = Logger.getLogger(BedHeightFactory.class); |
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30 |
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31 /** Query to get km and ws for wst_id and column_pos. */ |
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32 public static final String SQL_SELECT_SINGLE = |
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33 "SELECT bhsv.height, bhsv.station, bhsv.data_gap," + |
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34 " bhsv.sounding_width, bhs.year" + |
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35 " FROM bed_height bhs" + |
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36 " JOIN bed_height_values bhsv on bhsv.bed_height_id = bhs.id"; |
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37 |
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38 public static final String ID_CLAUSE = |
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39 " WHERE bhs.id = :height_id" + |
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40 " ORDER BY bhsv.station"; |
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41 |
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42 public static final String ID_STATION_CLAUSE = |
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43 " WHERE bhs.id = :height_id AND" + |
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44 " bhsv.station BETWEEN :fromkm AND :tokm" + |
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45 " ORDER BY bhsv.station"; |
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46 |
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47 /** Query to get name (description) for wst_id. */ |
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48 public static final String SQL_SELECT_DESCR_SINGLE = |
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49 "SELECT description FROM bed_height "+ |
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50 "WHERE id = :height_id"; |
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51 |
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52 private BedHeightFactory() { |
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53 } |
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54 |
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55 /** |
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56 * Get BedHeightData for given type and height_id, caring about the cache. |
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57 * If from or to are NaN all values are returned. Otherwise only get |
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58 * values with stations between from and to. |
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59 */ |
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60 public static BedHeightData getHeight(String type, int height_id, double from, double to) { |
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61 log.debug("BedHeightFactory.getHeight"); |
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62 Cache cache = CacheFactory.getCache("bedheight-value-table-static"); |
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63 |
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64 String cacheKey = Integer.toString(height_id) + ":" + |
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65 Double.toString(from) + ":" + Double.toString(to); |
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66 |
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67 if (cache != null) { |
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68 /* We could be more intelligent here and reuse cached values for |
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69 * a complete river and filter the other stations out afterwards. |
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70 * It might even be better to cache all values first and filter |
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71 * later. */ |
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72 Element element = cache.get(cacheKey); |
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73 if (element != null) { |
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74 log.debug("Got static bedheight values from cache"); |
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75 return (BedHeightData)element.getValue(); |
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76 } |
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77 } |
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78 else { |
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79 cacheKey = null; |
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80 } |
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81 |
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82 BedHeightData values = getBedHeightUncached(type, height_id, from, to); |
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83 |
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84 if (values != null && cacheKey != null) { |
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85 log.debug("Store static bed height values in cache."); |
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86 Element element = new Element(cacheKey, values); |
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87 cache.put(element); |
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88 } |
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89 return values; |
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90 } |
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91 |
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92 /** |
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93 * Get BedHeightData for given type and height_id, caring about the cache. |
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94 */ |
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95 public static BedHeightData getHeight(String type, int height_id) { |
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96 return getHeight(type, height_id, Double.NaN, Double.NaN); |
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97 } |
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98 |
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99 /** Get name for a BedHeight. */ |
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100 public static String getHeightName(String type, int height_id) { |
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101 log.debug("BedHeightFactory.getHeightName height_id/" + height_id); |
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102 |
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103 String name = null; |
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104 Session session = SessionHolder.HOLDER.get(); |
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105 |
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106 SQLQuery nameQuery = null; |
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107 if (type.equals("single")) { |
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108 nameQuery = session.createSQLQuery(SQL_SELECT_DESCR_SINGLE) |
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109 .addScalar("description", StandardBasicTypes.STRING); |
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110 nameQuery.setInteger("height_id", height_id); |
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111 } |
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112 else { |
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113 return "none"; |
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114 } |
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115 List<String> names = nameQuery.list(); |
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116 if (!names.isEmpty()) { |
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117 name = names.get(0); |
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118 } |
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119 |
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120 return name; |
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121 } |
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122 |
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123 |
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124 /** |
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125 * Get BedHeightData from db. |
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126 * |
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127 * If from or to are negative all stations are returned. Otherwise |
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128 * only the values with a station betweend from and to. |
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129 * @param height_id database id of the bed_height |
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130 * @param from minimum station value or NaN |
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131 * @param to maximum station value or NaN |
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132 * @return according BedHeight. |
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133 */ |
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134 public static BedHeightData getBedHeightUncached( |
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135 String type, |
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136 int height_id, |
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137 double from, |
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138 double to) |
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139 { |
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140 if (log.isDebugEnabled()) { |
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141 log.debug("BedHeightFactory.getBedHeightUncached"); |
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142 } |
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143 |
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144 Session session = SessionHolder.HOLDER.get(); |
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145 SQLQuery sqlQuery = null; |
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146 if (type.equals("single")) { |
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147 BedHeightData height = |
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148 new BedHeightData(getHeightName(type, height_id)); |
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149 String queryString = SQL_SELECT_SINGLE; |
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150 if (Double.isNaN(from) || Double.isNaN(to)) { |
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151 queryString += ID_CLAUSE; |
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152 } else { |
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153 queryString += ID_STATION_CLAUSE; |
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154 } |
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155 sqlQuery = session.createSQLQuery(queryString) |
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156 .addScalar("height", StandardBasicTypes.DOUBLE) |
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157 .addScalar("station", StandardBasicTypes.DOUBLE) |
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158 .addScalar("data_gap", StandardBasicTypes.DOUBLE) |
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159 .addScalar("sounding_width", StandardBasicTypes.DOUBLE) |
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160 .addScalar("year", StandardBasicTypes.INTEGER); |
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161 sqlQuery.setInteger("height_id", height_id); |
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162 if (!Double.isNaN(from) && !Double.isNaN(to)) { |
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163 sqlQuery.setDouble("fromkm", from); |
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164 sqlQuery.setDouble("tokm", to); |
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165 } |
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166 List<Object []> results = sqlQuery.list(); |
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167 |
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168 for (Object [] row: results) { |
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169 log.debug("got station: " + (Double)row[1]); |
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170 Double row0 = row[0] != null ? (Double)row[0] : Double.NaN; |
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171 Double row1 = row[1] != null ? (Double)row[1] : Double.NaN; |
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172 Double row2 = row[2] != null ? (Double)row[2] : Double.NaN; |
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173 Double row3 = row[3] != null ? (Double)row[3] : Double.NaN; |
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174 height.add(row0, row1, row2, row3, (Integer) row[4]); |
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175 } |
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176 return height; |
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177 } |
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178 return new BedHeightData(); |
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179 } |
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180 } |
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181 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |