Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java @ 1894:d5e51cc7da23

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New method to get interpolator for given wst_ids, also prepopulate arrays with NaNs. flys-artifacts/trunk@3254 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Tue, 15 Nov 2011 14:43:50 +0000
parents c3b44da22a3a
children 7053e3255ab4
rev   line source
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1 package de.intevation.flys.artifacts.model;
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2
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3 import java.util.Arrays;
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4 import java.util.List;
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5 import java.util.ArrayList;
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6
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7 import net.sf.ehcache.Cache;
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8 import net.sf.ehcache.Element;
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9
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10 import de.intevation.flys.artifacts.cache.CacheFactory;
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11
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12 import de.intevation.flys.backend.SessionHolder;
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13
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14 import org.apache.log4j.Logger;
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15
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16 import de.intevation.flys.model.River;
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17 import de.intevation.flys.model.Wst;
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19 import org.hibernate.Session;
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20 import org.hibernate.Query;
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21 import org.hibernate.SQLQuery;
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22
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23 import org.hibernate.type.StandardBasicTypes;
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25 /**
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26 * Creates WstValueTable s from database.
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27 * WstValueTable s are used to interpolate given w/q/km values.
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28 */
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29 public class WstValueTableFactory
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30 {
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31 private static Logger log = Logger.getLogger(WstValueTableFactory.class);
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33 public static final int DEFAULT_KIND = 0;
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34
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35 // TODO: put this into a property file
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36
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37 public static final String HQL_WST =
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38 "from Wst where river=:river and kind=:kind";
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39
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40 public static final String SQL_SELECT_NAMES_POS =
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41 "SELECT position, name FROM wst_columns " +
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42 "WHERE wst_id = :wst_id ORDER BY position";
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43
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44 public static final String SQL_SELECT_QS =
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45 "SELECT column_pos, q, a, b FROM wst_q_values " +
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46 "WHERE wst_id = :wst_id";
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47
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48 public static final String SQL_SELECT_WS =
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49 "SELECT km, w, column_pos FROM wst_w_values " +
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50 "WHERE wst_id = :wst_id";
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51
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52 private WstValueTableFactory() {
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53 }
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54
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55 public static WstValueTable getTable(River river) {
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56 return getTable(river, DEFAULT_KIND);
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57 }
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58
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59
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60 /**
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61 * Get WstValueTable to interpolate values of a given Wst.
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62 */
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63 public static WstValueTable getTable(int wst_id) {
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64
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65 /** @TODO cached/uncached */
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66
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67 Session session = SessionHolder.HOLDER.get();
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68
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69 // Fetch data for one column only.
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70
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71 WstValueTable.Column [] columns = loadColumns(session, wst_id);
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72 loadQRanges(session, columns, wst_id);
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73 List<WstValueTable.Row> rows = loadRows(session, wst_id, columns.length);
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74
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75 return new WstValueTable(columns, rows);
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76 }
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77 public static WstValueTable getTable(River river, int kind) {
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78
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79 Cache cache = CacheFactory.getCache(WstValueTableCacheKey.CACHE_NAME);
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80
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81 WstValueTableCacheKey cacheKey;
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82
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83 if (cache != null) {
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84 cacheKey = new WstValueTableCacheKey(river.getId(), kind);
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85 Element element = cache.get(cacheKey);
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86 if (element != null) {
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87 log.debug("got wst value table from cache");
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88 return (WstValueTable)element.getValue();
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89 }
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90 }
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91 else {
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92 cacheKey = null;
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93 }
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94
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95 WstValueTable valueTable = getTableUncached(river, kind);
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96
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97 if (valueTable != null && cacheKey != null) {
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98 log.debug("store wst value table in cache");
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99 Element element = new Element(cacheKey, valueTable);
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100 cache.put(element);
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101 }
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102
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103 return valueTable;
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104 }
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105
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106 public static WstValueTable getTableUncached(River river) {
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107 return getTableUncached(river, DEFAULT_KIND);
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108 }
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109
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110 public static WstValueTable getTableUncached(River river, int kind) {
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111
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112 Session session = SessionHolder.HOLDER.get();
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113
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114 Wst wst = loadWst(session, river, kind);
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115
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116 if (wst == null) {
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117 return null;
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118 }
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119
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120 WstValueTable.Column [] columns = loadColumns(session, wst);
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121
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122 loadQRanges(session, columns, wst);
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123
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124 List<WstValueTable.Row> rows = loadRows(session, wst, columns.length);
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125
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126 return new WstValueTable(columns, rows);
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127 }
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128
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129 /**
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130 * @param kind Kind of wst.
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131 */
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132 protected static Wst loadWst(Session session, River river, int kind) {
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133 Query query = session.createQuery(HQL_WST);
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134 query.setParameter("river", river);
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135 query.setInteger("kind", kind);
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136
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137 List<Wst> wsts = query.list();
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138
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139 // TODO Multiple wsts can match, why return just the first one?
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140 return wsts.isEmpty() ? null : wsts.get(0);
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141 }
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142
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143 protected static List<WstValueTable.Row> loadRows(
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144 Session session,
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145 int wst_id,
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146 int numColumns
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147 ){
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148 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS)
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149 .addScalar("km", StandardBasicTypes.DOUBLE)
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150 .addScalar("w", StandardBasicTypes.DOUBLE)
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151 .addScalar("column_pos", StandardBasicTypes.INTEGER);
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152
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153 sqlQuery.setInteger("wst_id", wst_id);
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154
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155 List<Object []> results = sqlQuery.list();
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156
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157 int lastColumn = Integer.MAX_VALUE;
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158 double [] ws = null;
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159
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160 ArrayList<WstValueTable.Row> rows = new ArrayList<WstValueTable.Row>();
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161
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162 for (Object [] result: results) {
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163 int column = (Integer)result[2];
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164 if (column < lastColumn) {
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165 ws = new double[numColumns];
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166 Arrays.fill(ws, Double.NaN);
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167 WstValueTable.Row row =
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168 new WstValueTable.Row((Double)result[0], ws);
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169 rows.add(row);
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170 }
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171 Double w = (Double)result[1];
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172 ws[column] = w != null ? w : Double.NaN;
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173 lastColumn = column;
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174 }
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175
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176 rows.trimToSize();
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177 return rows;
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178
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179 }
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180
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181 protected static List<WstValueTable.Row> loadRows(
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182 Session session,
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183 Wst wst,
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184 int numColumns
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185 ) {
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186 return loadRows(session, wst.getId(), numColumns);
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187 }
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188
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189
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190 /**
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191 * Get columns from wst-id.
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192 */
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193 protected static WstValueTable.Column [] loadColumns(
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194 Session session,
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195 int wst_id
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196 ) {
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197 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_NAMES_POS)
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198 .addScalar("position", StandardBasicTypes.INTEGER)
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199 .addScalar("name", StandardBasicTypes.STRING);
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200
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201 sqlQuery.setInteger("wst_id", wst_id);
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202
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203 List<Object []> columnNames = sqlQuery.list();
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204
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205 WstValueTable.Column [] columns =
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206 new WstValueTable.Column[columnNames.size()];
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207
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208 for (int i = 0; i < columns.length; ++i) {
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209 columns[i] = new WstValueTable.Column(
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210 (String)columnNames.get(i)[1]);
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211 }
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212 return columns;
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213 }
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214
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215 /**
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216 * Get columns from Wst.
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217 */
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218 protected static WstValueTable.Column [] loadColumns(
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219 Session session,
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220 Wst wst
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221 ) {
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222 return loadColumns(session, wst.getId());
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223 }
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224
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225 protected static void loadQRanges(
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226 Session session,
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227 WstValueTable.Column [] columns,
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228 int wst_id
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229 ) {
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230 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_QS)
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231 .addScalar("column_pos", StandardBasicTypes.INTEGER)
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232 .addScalar("q", StandardBasicTypes.DOUBLE)
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233 .addScalar("a", StandardBasicTypes.DOUBLE)
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234 .addScalar("b", StandardBasicTypes.DOUBLE);
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235
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236 sqlQuery.setInteger("wst_id", wst_id);
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237
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238 List<Object []> qRanges = sqlQuery.list();
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239
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240 int start = -1;
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241 int Q = qRanges.size();
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242 Integer lastColumn = null;
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243
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244 for (int i = 0; i < Q; ++i) {
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245 Object [] qRange = qRanges.get(i);
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246 Integer columnId = (Integer)qRange[0];
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247 if (lastColumn == null) {
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248 lastColumn = columnId;
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249 start = i;
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250 }
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251 else if (!lastColumn.equals(columnId)) {
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252 QRangeTree qRangeTree = new QRangeTree(qRanges, start, i);
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253 columns[lastColumn].setQRangeTree(qRangeTree);
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254 lastColumn = columnId;
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255 start = i;
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256 }
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257 }
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258
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259 if (start != -1) {
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260 QRangeTree qRangeTree = new QRangeTree(qRanges, start, Q);
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261 columns[lastColumn].setQRangeTree(qRangeTree);
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262 }
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263
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c09c9e05ecfa Removed trailing whitespace.
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264 /* This is debug code to visualize the q ranges trees
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265
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266 java.io.PrintWriter out = null;
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267 try {
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268 out = new java.io.PrintWriter(
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269 new java.io.FileWriter(
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270 "/tmp/qranges" + System.currentTimeMillis() + ".dot"));
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271
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272 out.println("graph \"Q ranges trees\" {");
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273
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274 for (int i = 0; i < columns.length; ++i) {
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275 QRangeTree tree = columns[i].getQRangeTree();
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276 out.println(tree.toGraph());
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277 }
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278
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279 out.println("}");
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280
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281 out.flush();
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282 }
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283 catch (java.io.IOException ioe) {
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284 log.error(ioe);
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285 }
633
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286 finally {
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287 if (out != null) {
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288 out.close();
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289 }
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290 }
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291 */
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c3b44da22a3a Minor refactoring in preparation of generation of interpolators (WstValueTable) for static WQKms.
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292
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293 }
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294
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295 protected static void loadQRanges(
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296 Session session,
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297 WstValueTable.Column [] columns,
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parents: 1780
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298 Wst wst
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parents: 1780
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299 ) {
c3b44da22a3a Minor refactoring in preparation of generation of interpolators (WstValueTable) for static WQKms.
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parents: 1780
diff changeset
300 loadQRanges(session, columns, wst.getId());
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301 }
443
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parents:
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302
5d65fe4c08d5 Separated the WST table loading logic from the calculations.
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303 }
5d65fe4c08d5 Separated the WST table loading logic from the calculations.
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parents:
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304 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org