svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.db / org.gvsig.fmap.dal.db.jdbc / src / main / java / org / gvsig / fmap / dal / store / jdbc2 / spi / operations / ResultSetForSetProviderOperation.java @ 43355
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1 | 43020 | jjdelcerro | package org.gvsig.fmap.dal.store.jdbc2.spi.operations; |
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2 | |||
3 | import java.sql.Connection; |
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4 | import java.util.ArrayList; |
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5 | import java.util.List; |
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6 | import org.apache.commons.lang3.StringUtils; |
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7 | 43355 | jjdelcerro | import org.gvsig.fmap.dal.ExpressionBuilder.Config; |
8 | 43020 | jjdelcerro | import org.gvsig.fmap.dal.exception.DataException; |
9 | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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10 | import org.gvsig.fmap.dal.feature.FeatureQuery; |
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11 | import org.gvsig.fmap.dal.feature.FeatureQueryOrder; |
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12 | 43026 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureQueryOrder.FeatureQueryOrderMember; |
13 | 43020 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureType; |
14 | import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper; |
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15 | import org.gvsig.fmap.dal.store.jdbc2.ResulSetControler.ResultSetEntry; |
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16 | import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase; |
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17 | import org.gvsig.fmap.geom.DataTypes; |
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18 | import org.gvsig.tools.evaluator.Evaluator; |
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19 | |||
20 | public class ResultSetForSetProviderOperation extends AbstractConnectionOperation { |
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21 | private final String schema; |
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22 | private final String table; |
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23 | private final String subquery; |
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24 | private final String baseFilter; |
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25 | private final String baseOrder; |
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26 | private final FeatureType storeType; |
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27 | private final FeatureType setType; |
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28 | private final FeatureQuery query; |
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29 | private final long limit; |
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30 | private final long offset; |
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31 | private final int fetchSize; |
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32 | private final String database; |
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33 | |||
34 | public ResultSetForSetProviderOperation(
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35 | JDBCHelper helper, |
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36 | String database,
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37 | String schema,
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38 | String table,
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39 | String subquery,
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40 | String baseFilter,
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41 | String baseOrder,
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42 | FeatureQuery query, |
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43 | FeatureType storeType, |
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44 | FeatureType setType, |
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45 | long limit,
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46 | long offset,
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47 | int fetchSize
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48 | ) { |
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49 | super(helper);
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50 | this.database = database;
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51 | this.schema = schema;
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52 | this.table = table;
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53 | this.subquery = subquery;
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54 | this.baseFilter = baseFilter;
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55 | this.baseOrder = baseOrder;
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56 | this.storeType = storeType;
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57 | this.setType = setType;
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58 | this.query = query;
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59 | this.limit = limit;
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60 | this.offset = offset;
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61 | this.fetchSize = fetchSize;
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62 | } |
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63 | |||
64 | @Override
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65 | public final Object perform(Connection conn) throws DataException { |
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66 | ResultSetEntry rs = createResultSet( |
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67 | database, schema, table, subquery, |
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68 | baseFilter, baseOrder, storeType, setType, query, |
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69 | limit, offset, fetchSize); |
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70 | return rs;
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71 | } |
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72 | |||
73 | public ResultSetEntry createResultSet(
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74 | String database,
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75 | String schema,
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76 | String table,
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77 | String subquery,
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78 | String baseFilter,
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79 | String baseOrder,
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80 | FeatureType storeType, |
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81 | FeatureType setType, |
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82 | FeatureQuery query, |
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83 | long limit,
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84 | long offset,
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85 | int fetchSize
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86 | ) throws DataException {
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87 | |||
88 | 43355 | jjdelcerro | double tolerance = -1 ; //query.getScale(); |
89 | 43020 | jjdelcerro | JDBCSQLBuilderBase sqlbuilder = createSQLBuilder(); |
90 | |||
91 | List<String> primaryKeys = new ArrayList<>(); |
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92 | for(FeatureAttributeDescriptor attr : storeType.getPrimaryKey() ) {
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93 | primaryKeys.add(attr.getName()); |
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94 | } |
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95 | 43093 | jjdelcerro | for(String attrName : primaryKeys ) { |
96 | // Ordenamos siempre por las claves primarias para garantizar
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97 | // un orden predecible. Ademas se precisa indicar un orden para
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98 | // usar OFFSET.
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99 | sqlbuilder.select().order_by().column(sqlbuilder.identifier(attrName)); |
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100 | } |
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101 | 43020 | jjdelcerro | for(FeatureAttributeDescriptor attr : setType ) {
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102 | if( attr.isPrimaryKey() ) {
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103 | primaryKeys.remove(attr.getName()); |
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104 | } |
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105 | if( attr.getType() == DataTypes.GEOMETRY ) {
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106 | 43355 | jjdelcerro | if( tolerance<=0 || !sqlbuilder.getConfig().has_functionality(Config.ST_Simplify)) { |
107 | sqlbuilder.select().column().name(attr.getName()).as_geometry(); |
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108 | } else {
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109 | sqlbuilder.select().column().value( |
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110 | sqlbuilder.ST_Simplify( |
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111 | sqlbuilder.column(attr.getName()), |
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112 | sqlbuilder.constant(tolerance) |
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113 | ) |
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114 | ).as_geometry(); |
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115 | } |
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116 | 43020 | jjdelcerro | } else {
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117 | sqlbuilder.select().column().name(attr.getName()); |
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118 | } |
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119 | } |
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120 | for(String attrName : primaryKeys ) { |
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121 | sqlbuilder.select().column().name(attrName); |
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122 | } |
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123 | |||
124 | if( StringUtils.isEmpty(subquery) ) {
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125 | sqlbuilder.select().from().table().database(database).schema(schema).name(table); |
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126 | } else {
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127 | sqlbuilder.select().from().subquery(subquery); |
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128 | } |
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129 | |||
130 | Evaluator filter = query.getFilter(); |
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131 | if( filter != null ) { |
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132 | String sqlfilter = filter.getSQL();
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133 | if( ! StringUtils.isEmpty(sqlfilter) ) {
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134 | sqlbuilder.select().where().set( sqlbuilder.custom(sqlfilter) ); |
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135 | } |
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136 | } |
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137 | if( ! StringUtils.isEmpty(baseFilter) ) {
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138 | sqlbuilder.select().where().and(sqlbuilder.custom(baseFilter)); |
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139 | } |
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140 | |||
141 | FeatureQueryOrder order = query.getOrder(); |
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142 | if( order != null ) { |
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143 | 43026 | jjdelcerro | for( FeatureQueryOrderMember member : order.members() ) {
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144 | 43020 | jjdelcerro | if( member.hasEvaluator() ) {
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145 | String sqlorder = member.getEvaluator().getSQL();
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146 | if( ! StringUtils.isEmpty(sqlorder) ) {
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147 | sqlbuilder.select().order_by() |
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148 | .custom(sqlorder); |
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149 | } |
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150 | } else {
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151 | |||
152 | sqlbuilder.select().order_by() |
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153 | .column(member.getAttributeName()) |
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154 | .ascending(member.getAscending()); |
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155 | } |
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156 | } |
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157 | } |
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158 | if( !StringUtils.isEmpty(baseOrder) ) {
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159 | sqlbuilder.select().order_by().custom(baseOrder); |
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160 | } |
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161 | |||
162 | if( limit > 0 ) { |
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163 | sqlbuilder.select().limit(limit); |
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164 | } else {
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165 | sqlbuilder.select().limit(query.getLimit()); |
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166 | } |
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167 | if( offset>0 ) { |
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168 | sqlbuilder.select().offset(offset); |
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169 | } |
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170 | |||
171 | String sql = sqlbuilder.toString();
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172 | ResultSetEntry resultSetEntry = this.helper.getResulSetControler().create(
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173 | sql, fetchSize |
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174 | ); |
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175 | return resultSetEntry;
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176 | } |
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177 | |||
178 | } |