Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/HYKFactory.java @ 2419:98a350bb91a9

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Fixed broken HYKs in crosssection charts for river Mosel. flys-artifacts/trunk@4053 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 16 Feb 2012 06:47:46 +0000
parents 8c9c40459d8f
children ac528b883b47
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 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 import org.hibernate.SQLQuery;
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18 import org.hibernate.type.StandardBasicTypes;
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20 import de.intevation.flys.model.HYK;
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21 import de.intevation.flys.model.HYKFormation;
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22 import de.intevation.flys.model.HYKFlowZone;
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23
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24 import de.intevation.flys.artifacts.cache.CacheFactory;
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25
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26 import de.intevation.flys.backend.SessionHolder;
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27
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28
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29 /**
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30 * Factory to access HYKs (hydrographic values).
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31 */
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32 public class HYKFactory
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33 {
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34 private static Logger logger = Logger.getLogger(HYKFactory.class);
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35
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36 public static String HYK_CACHE_NAME = "hykache";
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37
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38
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39 /** Do not instantiate a HYKFactory. */
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40 private HYKFactory() {
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41 }
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42
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43
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44 /**
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45 * Get List of Zones for given river and km.
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46 */
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47 public static Object getHYKs(int hykid, double km) {
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48 logger.debug("HYKFactory.getHYKs");
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49
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50 Cache cache = CacheFactory.getCache(HYK_CACHE_NAME);
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51
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52 String cacheKey;
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53
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54 if (cache != null) {
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55 cacheKey = "" + hykid + "_" + km;
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56 Element element = cache.get(cacheKey);
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57 if (element != null) {
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58 logger.debug("Got hyk from cache");
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59 return (List<Zone>)element.getValue();
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60 }
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61 }
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62 else {
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63 cacheKey = null;
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64 }
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65
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66 List<Zone> zones = getZonesUncached(hykid, km);
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67
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68 if (zones != null && cacheKey != null) {
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69 logger.debug("Store hykzones in cache.");
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70 Element element = new Element(cacheKey, zones);
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71 cache.put(element);
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72 }
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73
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74 return zones;
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75 }
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76
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77
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78 /** Return name for hyk with given id. */
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79 public static String getHykName(int hykid) {
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80 logger.debug("HYKFactory.getHykName " + hykid);
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81
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82 Session session = SessionHolder.HOLDER.get();
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83
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84 Query query = session.createQuery(
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85 "select description from HYK where id = :hykid ");
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86 query.setParameter("hykid", hykid);
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87
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88 return (String) query.uniqueResult();
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89 }
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90
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91
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92 /**
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93 * Ask DB for hyk zones.
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94 * @param hykid ID of the 'main' HYK to query.
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95 * @param km for which to get the hyk-zones.
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96 * @return according zones.
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97 */
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98 public static List<Zone> getZonesUncached(int hykid, double km) {
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99 if (logger.isDebugEnabled()) {
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100 logger.debug("HYKFactory.getZoneUncached " + hykid + " km " + km);
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101 }
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102
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103 Session session = SessionHolder.HOLDER.get();
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104
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105 // Find out flow-direction of river.
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106 // OPTIMIZE: 1) query kmUp directly 2) merge queries.
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107 Query rQuery = session.createQuery("from HYK where id = :hykid");
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108 rQuery.setParameter("hykid", hykid);
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109 rQuery.setMaxResults(1);
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110 HYK hyk = (HYK) rQuery.uniqueResult();
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111
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112 double flowDir = hyk.getRiver().getKmUp() ? 1 : -1;
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113
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114 List<HYKFormation> forms = getHYKFormations(hykid, km, flowDir);
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115 List<Zone> zones = new ArrayList<Zone>();
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116
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117 // Take the first one.
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118 if (forms.size() >= 1) {
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119 HYKFormation form = forms.get(0);
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120 // Create respective zones.
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121 for (HYKFlowZone flowZone: form.getZones()) {
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122 Zone z = new Zone(flowZone.getA().doubleValue(),
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123 flowZone.getB().doubleValue(),
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124 flowZone.getType().getName());
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125 zones.add(z);
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126 }
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127 }
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128
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129 return zones;
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130 }
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131
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132
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133 protected static List<HYKFormation> getHYKFormations(
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134 int hykid,
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135 double km,
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136 double flowDir
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137 ) {
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138 Session session = SessionHolder.HOLDER.get();
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139
98a350bb91a9 Fixed broken HYKs in crosssection charts for river Mosel.
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140 String SQL = "SELECT " +
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141 " f.id AS FID, " +
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142 " f.distance_vl AS DIST, " +
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143 " e.hyk_id AS HID, " +
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144 " e.km AS KM " +
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145 " FROM hyk_formations f INNER JOIN hyk_entries e " +
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146 " ON e.id = f.hyk_entry_id " +
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147 " WHERE e.hyk_id = :hykid " +
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148 " AND :km between " +
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149 " LEAST(e.km, e.km + :flowDir*(f.distance_vl/1000.0+0.001)) " +
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150 " AND " +
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151 " GREATEST(e.km, e.km + :flowDir*(f.distance_vl/1000.0+0.001))";
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152
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153 SQLQuery sqlQuery = session.createSQLQuery(SQL)
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154 .addScalar("FID", StandardBasicTypes.INTEGER)
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155 .addScalar("DIST", StandardBasicTypes.DOUBLE)
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156 .addScalar("HID", StandardBasicTypes.INTEGER)
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157 .addScalar("KM", StandardBasicTypes.DOUBLE);
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158
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159 sqlQuery.setInteger("hykid", hykid);
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160 sqlQuery.setDouble("flowDir", flowDir);
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161 sqlQuery.setDouble("km", km);
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162
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163 logger.debug("HYK SQL: " + sqlQuery.getQueryString());
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164
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165 List<Object[]> results = sqlQuery.list();
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166
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167 logger.debug("Found " + results.size() + " HYKFormation IDs in DB.");
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168
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169 if (results == null || results.isEmpty()) {
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170 logger.debug("No HYK found for ID " + hykid + " at km " + km);
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171 return new ArrayList<HYKFormation>();
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172 }
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173
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174 Object[] resultSet = results.get(0);
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175 Integer hykFormationId = (Integer) resultSet[0];
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176
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177 Query query = session.createQuery("from HYKFormation where id = :id");
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178 query.setParameter("id", hykFormationId);
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179 query.setMaxResults(1);
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180
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181 return query.list();
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182 }
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183
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184
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185 /** Labelled section. */
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186 public static class Zone implements Serializable {
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187 /** Lower end of segment. */
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188 protected double from;
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189 /** Upper end of segment. */
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190 protected double to;
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191 /** The label. */
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192 protected String name;
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193
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194 /** Constructor for labelled section. */
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195 public Zone (double from, double to, String name) {
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196 this.from = from;
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197 this.to = to;
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198 this.name = name;
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199 }
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200
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201 /** Get upper value. */
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202 public double getTo() {
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203 return to;
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204 }
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205
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206 /** Get lower value. */
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207 public double getFrom() {
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208 return from;
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209 }
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210
2137
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211 /** Get name (type). */
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212 public String getName() {
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213 return name;
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214 }
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215 } // public static class Zone
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216 }
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217 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org