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 @ 44058
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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 | 43358 | jjdelcerro | import org.apache.commons.lang3.ArrayUtils; |
7 | 43020 | jjdelcerro | import org.apache.commons.lang3.StringUtils; |
8 | 44042 | jjdelcerro | import org.gvsig.expressionevaluator.ExpressionBuilder.Config; |
9 | 43020 | jjdelcerro | import org.gvsig.fmap.dal.exception.DataException; |
10 | import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor; |
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11 | import org.gvsig.fmap.dal.feature.FeatureQuery; |
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12 | import org.gvsig.fmap.dal.feature.FeatureQueryOrder; |
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13 | 43026 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureQueryOrder.FeatureQueryOrderMember; |
14 | 43020 | jjdelcerro | import org.gvsig.fmap.dal.feature.FeatureType; |
15 | import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper; |
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16 | 44058 | jjdelcerro | import org.gvsig.fmap.dal.store.jdbc2.OperationsFactory.TableReference; |
17 | 43020 | jjdelcerro | import org.gvsig.fmap.dal.store.jdbc2.ResulSetControler.ResultSetEntry; |
18 | import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase; |
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19 | import org.gvsig.fmap.geom.DataTypes; |
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20 | import org.gvsig.tools.evaluator.Evaluator; |
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21 | |||
22 | public class ResultSetForSetProviderOperation extends AbstractConnectionOperation { |
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23 | 44058 | jjdelcerro | private final TableReference table; |
24 | 43020 | jjdelcerro | private final String baseFilter; |
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 | |||
33 | public ResultSetForSetProviderOperation(
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34 | JDBCHelper helper, |
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35 | 44058 | jjdelcerro | TableReference table, |
36 | 43020 | jjdelcerro | String baseFilter,
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37 | String baseOrder,
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38 | FeatureQuery query, |
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39 | FeatureType storeType, |
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40 | FeatureType setType, |
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41 | long limit,
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42 | long offset,
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43 | int fetchSize
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44 | ) { |
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45 | super(helper);
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46 | this.table = table;
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47 | this.baseFilter = baseFilter;
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48 | this.baseOrder = baseOrder;
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49 | this.storeType = storeType;
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50 | this.setType = setType;
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51 | this.query = query;
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52 | this.limit = limit;
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53 | this.offset = offset;
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54 | this.fetchSize = fetchSize;
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55 | } |
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56 | |||
57 | @Override
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58 | 43377 | jjdelcerro | protected Object perform_operation() throws Exception { |
59 | 43020 | jjdelcerro | ResultSetEntry rs = createResultSet( |
60 | 44058 | jjdelcerro | table, baseFilter, baseOrder, storeType, setType, query, |
61 | 43020 | jjdelcerro | limit, offset, fetchSize); |
62 | return rs;
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63 | } |
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64 | 43377 | jjdelcerro | |
65 | @Override
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66 | public Object perform(Connection conn) throws DataException { |
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67 | throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates. |
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68 | } |
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69 | |||
70 | 43020 | jjdelcerro | public ResultSetEntry createResultSet(
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71 | 44058 | jjdelcerro | TableReference table, |
72 | 43020 | jjdelcerro | String baseFilter,
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73 | String baseOrder,
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74 | FeatureType storeType, |
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75 | FeatureType setType, |
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76 | FeatureQuery query, |
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77 | long limit,
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78 | long offset,
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79 | int fetchSize
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80 | ) throws DataException {
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81 | 43358 | jjdelcerro | List<FeatureAttributeDescriptor> columns = new ArrayList<>(); |
82 | 43020 | jjdelcerro | |
83 | 43355 | jjdelcerro | double tolerance = -1 ; //query.getScale(); |
84 | 43020 | jjdelcerro | JDBCSQLBuilderBase sqlbuilder = createSQLBuilder(); |
85 | |||
86 | List<String> primaryKeys = new ArrayList<>(); |
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87 | for(FeatureAttributeDescriptor attr : storeType.getPrimaryKey() ) {
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88 | primaryKeys.add(attr.getName()); |
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89 | } |
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90 | 43706 | jjdelcerro | List<String> forcedColumns = new ArrayList<>(primaryKeys); |
91 | |||
92 | 43358 | jjdelcerro | String[] constantsAttributeNames = null; |
93 | if(query !=null && query.hasConstantsAttributeNames() ) { |
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94 | constantsAttributeNames = query.getConstantsAttributeNames(); |
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95 | } |
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96 | 43020 | jjdelcerro | for(FeatureAttributeDescriptor attr : setType ) {
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97 | 43358 | jjdelcerro | if( ArrayUtils.contains(constantsAttributeNames, attr.getName()) ) {
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98 | continue;
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99 | } |
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100 | 43020 | jjdelcerro | if( attr.isPrimaryKey() ) {
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101 | 43706 | jjdelcerro | forcedColumns.remove(attr.getName()); |
102 | 43020 | jjdelcerro | } |
103 | if( attr.getType() == DataTypes.GEOMETRY ) {
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104 | 43355 | jjdelcerro | if( tolerance<=0 || !sqlbuilder.getConfig().has_functionality(Config.ST_Simplify)) { |
105 | sqlbuilder.select().column().name(attr.getName()).as_geometry(); |
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106 | } else {
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107 | sqlbuilder.select().column().value( |
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108 | sqlbuilder.ST_Simplify( |
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109 | sqlbuilder.column(attr.getName()), |
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110 | sqlbuilder.constant(tolerance) |
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111 | ) |
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112 | ).as_geometry(); |
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113 | } |
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114 | 43358 | jjdelcerro | columns.add(attr); |
115 | 43020 | jjdelcerro | } else {
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116 | sqlbuilder.select().column().name(attr.getName()); |
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117 | 43358 | jjdelcerro | columns.add(attr); |
118 | 43020 | jjdelcerro | } |
119 | } |
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120 | 43706 | jjdelcerro | for(String attrName : forcedColumns ) { |
121 | 43020 | jjdelcerro | sqlbuilder.select().column().name(attrName); |
122 | 43358 | jjdelcerro | columns.add(setType.getAttributeDescriptor(attrName)); |
123 | 43020 | jjdelcerro | } |
124 | |||
125 | 44058 | jjdelcerro | sqlbuilder.select().from().table() |
126 | .database(this.table.getDatabase())
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127 | .schema(this.table.getSchema())
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128 | .name(this.table.getTable());
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129 | sqlbuilder.select().from().subquery(this.table.getSubquery());
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130 | 43020 | jjdelcerro | |
131 | 44058 | jjdelcerro | Evaluator filter = query==null? null:query.getFilter(); |
132 | 43020 | jjdelcerro | if( filter != null ) { |
133 | String sqlfilter = filter.getSQL();
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134 | if( ! StringUtils.isEmpty(sqlfilter) ) {
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135 | sqlbuilder.select().where().set( sqlbuilder.custom(sqlfilter) ); |
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136 | } |
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137 | } |
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138 | if( ! StringUtils.isEmpty(baseFilter) ) {
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139 | sqlbuilder.select().where().and(sqlbuilder.custom(baseFilter)); |
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140 | } |
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141 | |||
142 | 44058 | jjdelcerro | FeatureQueryOrder order = query==null? null:query.getOrder(); |
143 | 43020 | jjdelcerro | if( order != null ) { |
144 | 43026 | jjdelcerro | for( FeatureQueryOrderMember member : order.members() ) {
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145 | 43020 | jjdelcerro | if( member.hasEvaluator() ) {
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146 | String sqlorder = member.getEvaluator().getSQL();
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147 | if( ! StringUtils.isEmpty(sqlorder) ) {
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148 | sqlbuilder.select().order_by() |
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149 | .custom(sqlorder); |
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150 | } |
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151 | } else {
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152 | |||
153 | sqlbuilder.select().order_by() |
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154 | .column(member.getAttributeName()) |
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155 | .ascending(member.getAscending()); |
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156 | } |
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157 | } |
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158 | } |
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159 | if( !StringUtils.isEmpty(baseOrder) ) {
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160 | sqlbuilder.select().order_by().custom(baseOrder); |
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161 | } |
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162 | 43706 | jjdelcerro | if( offset>0 || (offset==0 && limit>0) ) { |
163 | // No tengo claro que (offset==0 && limit>0) sea lo mas correcto,
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164 | // Pero cuando se va a paginar y se pide la primera pagina offset es
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165 | // 0 y limit>0, y si no ordenamos ya esa primera pagina los resultados
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166 | // que se obtienen no son correctos, ya que la primera pagina se saca
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167 | // sin ordenar y el resto ordenadas.
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168 | // Probablemente deberiamos tener alguna otra forma de detectar que
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169 | // estamos paginanado ya que asi no distinguimo si solo queremos
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170 | // obtener los primeros elementos sin importarnos su orden.
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171 | for(String attrName : primaryKeys ) { |
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172 | // Se precisa indicar un orden para usar OFFSET.
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173 | sqlbuilder.select().order_by().column(sqlbuilder.identifier(attrName)).ascending(); |
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174 | } |
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175 | } |
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176 | 43020 | jjdelcerro | if( limit > 0 ) { |
177 | sqlbuilder.select().limit(limit); |
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178 | } else {
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179 | 44058 | jjdelcerro | sqlbuilder.select().limit(query==null? null:query.getLimit()); |
180 | 43020 | jjdelcerro | } |
181 | if( offset>0 ) { |
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182 | sqlbuilder.select().offset(offset); |
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183 | } |
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184 | |||
185 | String sql = sqlbuilder.toString();
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186 | ResultSetEntry resultSetEntry = this.helper.getResulSetControler().create(
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187 | 43358 | jjdelcerro | sql, fetchSize, columns.toArray(new FeatureAttributeDescriptor[columns.size()])
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188 | 43020 | jjdelcerro | ); |
189 | return resultSetEntry;
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190 | } |
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191 | |||
192 | } |