Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WstValueTableFactory.java @ 1839:c3b44da22a3a
Minor refactoring in preparation of generation of interpolators (WstValueTable) for static WQKms.
flys-artifacts/trunk@3175 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Mon, 07 Nov 2011 12:37:41 +0000 |
parents | b503d92dd709 |
children | d5e51cc7da23 |
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.List; |
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4 import java.util.ArrayList; |
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5 |
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6 import net.sf.ehcache.Cache; |
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7 import net.sf.ehcache.Element; |
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8 |
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9 import de.intevation.flys.artifacts.cache.CacheFactory; |
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10 |
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11 import de.intevation.flys.backend.SessionHolder; |
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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 de.intevation.flys.model.River; |
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16 import de.intevation.flys.model.Wst; |
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17 |
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18 import org.hibernate.Session; |
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19 import org.hibernate.Query; |
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20 import org.hibernate.SQLQuery; |
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21 |
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22 import org.hibernate.type.StandardBasicTypes; |
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23 |
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24 /** |
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25 * Creates WstValueTable s from database. |
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26 * WstValueTable s are used to interpolate given w/q/km values. |
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27 */ |
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28 public class WstValueTableFactory |
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29 { |
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30 private static Logger log = Logger.getLogger(WstValueTableFactory.class); |
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31 |
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32 public static final int DEFAULT_KIND = 0; |
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33 |
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34 // TODO: put this into a property file |
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35 |
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36 public static final String HQL_WST = |
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37 "from Wst where river=:river and kind=:kind"; |
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38 |
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39 public static final String SQL_SELECT_NAMES_POS = |
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40 "SELECT position, name FROM wst_columns " + |
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41 "WHERE wst_id = :wst_id ORDER BY position"; |
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42 |
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43 public static final String SQL_SELECT_QS = |
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44 "SELECT column_pos, q, a, b FROM wst_q_values " + |
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45 "WHERE wst_id = :wst_id"; |
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46 |
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47 public static final String SQL_SELECT_WS = |
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48 "SELECT km, w, column_pos FROM wst_w_values " + |
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49 "WHERE wst_id = :wst_id"; |
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50 |
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51 private WstValueTableFactory() { |
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52 } |
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53 |
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54 public static WstValueTable getTable(River river) { |
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55 return getTable(river, DEFAULT_KIND); |
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56 } |
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57 |
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parents:
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58 |
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59 public static WstValueTable getTable(River river, int kind) { |
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60 |
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61 Cache cache = CacheFactory.getCache(WstValueTableCacheKey.CACHE_NAME); |
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62 |
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63 WstValueTableCacheKey cacheKey; |
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64 |
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65 if (cache != null) { |
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66 cacheKey = new WstValueTableCacheKey(river.getId(), kind); |
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67 Element element = cache.get(cacheKey); |
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68 if (element != null) { |
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69 log.debug("got wst value table from cache"); |
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70 return (WstValueTable)element.getValue(); |
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71 } |
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72 } |
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73 else { |
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74 cacheKey = null; |
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75 } |
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76 |
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77 WstValueTable valueTable = getTableUncached(river, kind); |
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78 |
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79 if (valueTable != null && cacheKey != null) { |
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80 log.debug("store wst value table in cache"); |
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81 Element element = new Element(cacheKey, valueTable); |
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82 cache.put(element); |
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83 } |
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84 |
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85 return valueTable; |
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86 } |
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87 |
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88 public static WstValueTable getTableUncached(River river) { |
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89 return getTableUncached(river, DEFAULT_KIND); |
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90 } |
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91 |
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92 public static WstValueTable getTableUncached(River river, int kind) { |
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93 |
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94 Session session = SessionHolder.HOLDER.get(); |
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95 |
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96 Wst wst = loadWst(session, river, kind); |
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97 |
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98 if (wst == null) { |
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99 return null; |
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100 } |
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101 |
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102 WstValueTable.Column [] columns = loadColumns(session, wst); |
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103 |
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104 loadQRanges(session, columns, wst); |
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105 |
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106 List<WstValueTable.Row> rows = loadRows(session, wst, columns.length); |
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107 |
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108 return new WstValueTable(columns, rows); |
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109 } |
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110 |
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111 /** |
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112 * @param kind Kind of wst. |
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113 */ |
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114 protected static Wst loadWst(Session session, River river, int kind) { |
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115 Query query = session.createQuery(HQL_WST); |
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116 query.setParameter("river", river); |
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117 query.setInteger("kind", kind); |
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118 |
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119 List<Wst> wsts = query.list(); |
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120 |
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121 // TODO Multiple wsts can match, why return just the first one? |
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122 return wsts.isEmpty() ? null : wsts.get(0); |
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123 } |
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124 |
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125 protected static List<WstValueTable.Row> loadRows( |
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126 Session session, |
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127 int wst_id, |
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128 int numColumns |
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129 ){ |
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130 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS) |
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131 .addScalar("km", StandardBasicTypes.DOUBLE) |
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132 .addScalar("w", StandardBasicTypes.DOUBLE) |
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133 .addScalar("column_pos", StandardBasicTypes.INTEGER); |
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134 |
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135 sqlQuery.setInteger("wst_id", wst_id); |
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136 |
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137 List<Object []> results = sqlQuery.list(); |
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138 |
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139 int lastColumn = Integer.MAX_VALUE; |
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140 double [] ws = null; |
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141 |
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142 ArrayList<WstValueTable.Row> rows = new ArrayList<WstValueTable.Row>(); |
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143 |
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144 for (Object [] result: results) { |
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145 int column = (Integer)result[2]; |
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146 if (column < lastColumn) { |
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147 ws = new double[numColumns]; |
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148 WstValueTable.Row row = |
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149 new WstValueTable.Row((Double)result[0], ws); |
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150 rows.add(row); |
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151 } |
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152 Double w = (Double)result[1]; |
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153 ws[column] = w != null ? w : Double.NaN; |
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154 lastColumn = column; |
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155 } |
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156 |
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157 rows.trimToSize(); |
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158 return rows; |
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159 |
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160 } |
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161 |
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162 protected static List<WstValueTable.Row> loadRows( |
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163 Session session, |
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164 Wst wst, |
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165 int numColumns |
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166 ) { |
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167 return loadRows(session, wst.getId(), numColumns); |
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168 } |
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169 |
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170 |
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171 /** |
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172 * Get columns from wst-id. |
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173 */ |
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174 protected static WstValueTable.Column [] loadColumns( |
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175 Session session, |
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176 int wst_id |
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177 ) { |
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178 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_NAMES_POS) |
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179 .addScalar("position", StandardBasicTypes.INTEGER) |
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180 .addScalar("name", StandardBasicTypes.STRING); |
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181 |
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182 sqlQuery.setInteger("wst_id", wst_id); |
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183 |
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184 List<Object []> columnNames = sqlQuery.list(); |
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185 |
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186 WstValueTable.Column [] columns = |
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187 new WstValueTable.Column[columnNames.size()]; |
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188 |
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189 for (int i = 0; i < columns.length; ++i) { |
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190 columns[i] = new WstValueTable.Column( |
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191 (String)columnNames.get(i)[1]); |
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192 } |
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193 return columns; |
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194 } |
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195 |
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196 /** |
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197 * Get columns from Wst. |
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198 */ |
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199 protected static WstValueTable.Column [] loadColumns( |
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200 Session session, |
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201 Wst wst |
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202 ) { |
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203 return loadColumns(session, wst.getId()); |
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204 } |
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205 |
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206 protected static void loadQRanges( |
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207 Session session, |
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208 WstValueTable.Column [] columns, |
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209 int wst_id |
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210 ) { |
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211 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_QS) |
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212 .addScalar("column_pos", StandardBasicTypes.INTEGER) |
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213 .addScalar("q", StandardBasicTypes.DOUBLE) |
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214 .addScalar("a", StandardBasicTypes.DOUBLE) |
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215 .addScalar("b", StandardBasicTypes.DOUBLE); |
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216 |
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217 sqlQuery.setInteger("wst_id", wst_id); |
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218 |
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219 List<Object []> qRanges = sqlQuery.list(); |
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220 |
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221 int start = -1; |
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222 int Q = qRanges.size(); |
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223 Integer lastColumn = null; |
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224 |
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225 for (int i = 0; i < Q; ++i) { |
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226 Object [] qRange = qRanges.get(i); |
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227 Integer columnId = (Integer)qRange[0]; |
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228 if (lastColumn == null) { |
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229 lastColumn = columnId; |
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230 start = i; |
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231 } |
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232 else if (!lastColumn.equals(columnId)) { |
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233 QRangeTree qRangeTree = new QRangeTree(qRanges, start, i); |
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234 columns[lastColumn].setQRangeTree(qRangeTree); |
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235 lastColumn = columnId; |
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236 start = i; |
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237 } |
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238 } |
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239 |
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240 if (start != -1) { |
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241 QRangeTree qRangeTree = new QRangeTree(qRanges, start, Q); |
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242 columns[lastColumn].setQRangeTree(qRangeTree); |
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243 } |
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244 |
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245 /* This is debug code to visualize the q ranges trees |
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246 |
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247 java.io.PrintWriter out = null; |
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248 try { |
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249 out = new java.io.PrintWriter( |
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250 new java.io.FileWriter( |
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251 "/tmp/qranges" + System.currentTimeMillis() + ".dot")); |
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252 |
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253 out.println("graph \"Q ranges trees\" {"); |
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254 |
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255 for (int i = 0; i < columns.length; ++i) { |
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256 QRangeTree tree = columns[i].getQRangeTree(); |
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257 out.println(tree.toGraph()); |
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258 } |
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259 |
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260 out.println("}"); |
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261 |
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262 out.flush(); |
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263 } |
633
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264 catch (java.io.IOException ioe) { |
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265 log.error(ioe); |
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266 } |
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267 finally { |
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268 if (out != null) { |
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269 out.close(); |
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270 } |
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271 } |
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272 */ |
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273 |
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274 } |
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275 |
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276 protected static void loadQRanges( |
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277 Session session, |
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278 WstValueTable.Column [] columns, |
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279 Wst wst |
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280 ) { |
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281 loadQRanges(session, columns, wst.getId()); |
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282 } |
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283 |
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284 } |
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285 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |