Revision 46050 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/expressionbuilder/formatters/ComputedAttribute.java

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ComputedAttribute.java
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 */
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package org.gvsig.fmap.dal.store.jdbc2.spi.expressionbuilder.formatters;
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import org.gvsig.expressionevaluator.Code;


  		




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import org.gvsig.expressionevaluator.Expression;


  		




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import org.gvsig.expressionevaluator.ExpressionBuilder;


  		




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import org.gvsig.expressionevaluator.ExpressionBuilder.Value;


  		




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import org.gvsig.expressionevaluator.Formatter;


  		




  
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import org.gvsig.expressionevaluator.GeometryExpressionBuilder;


  		




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import org.gvsig.fmap.dal.SQLBuilder;


  		




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import org.gvsig.fmap.dal.expressionevaluator.FeatureAttributeEmulatorExpression;


  		




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import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;


  		




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import org.gvsig.fmap.dal.feature.FeatureAttributeEmulator;


  		




  
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import org.gvsig.fmap.dal.feature.FeatureQuery;


  		




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import org.gvsig.fmap.dal.feature.FeatureType;


  		




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import org.gvsig.fmap.dal.store.jdbc2.JDBCHelper;


  		




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import org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase;


  		




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import static org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase.PROP_FEATURE_TYPE;


  		




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import static org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase.PROP_JDBCHELPER;


  		




  
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import static org.gvsig.fmap.dal.store.jdbc2.spi.JDBCSQLBuilderBase.PROP_QUERY;


  		




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/**


  		




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 *


  		




  ......




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            }


  		




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            ExpressionBuilder.Variable variable = (ExpressionBuilder.Variable) value;


  		




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            FeatureAttributeDescriptor attr = featureType.getAttributeDescriptor(variable.name());


  		




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            if( attr==null || !attr.isComputed() ) {


  		




  
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            if (attr == null) {


  		




  
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                FeatureQuery query = (FeatureQuery) value.getProperty(PROP_QUERY);


  		




  
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                attr = query.getExtraColumn().get(variable.name());


  		




  
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            }


  		




  
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            if (attr == null || !attr.isComputed()) {


  		




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                return false;


  		




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            }


  		




  
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            FeatureAttributeEmulator emulator = attr.getFeatureAttributeEmulator();


  		




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            if( !(emulator instanceof FeatureAttributeEmulatorExpression) ) {


  		




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                return false;


  		




  ......




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        FeatureType featureType = (FeatureType) value.getProperty(PROP_FEATURE_TYPE);


  		




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        ExpressionBuilder.Variable variable = (ExpressionBuilder.Variable) value;


  		




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        FeatureAttributeDescriptor attr = featureType.getAttributeDescriptor(variable.name());


  		




  
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        if (attr == null) {


  		




  
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            FeatureQuery query = (FeatureQuery) value.getProperty(PROP_QUERY);


  		




  
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            attr = query.getExtraColumn().get(variable.name());


  		




  
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        }


  		




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        FeatureAttributeEmulator emulator = attr.getFeatureAttributeEmulator();


  		




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        Expression expr = ((FeatureAttributeEmulatorExpression)emulator).getExpression();


  		




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        return "("+ this.formatter.format(expr.getCode().toValue(this.sqlbuilder.expression()))+")";


  		




  
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        Code code = expr.getCode();


  		




  
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        GeometryExpressionBuilder builder = this.sqlbuilder.expression();


  		




  
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        Value valueExpr = code.toValue(builder);


  		




  
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        return "("+ this.formatter.format(valueExpr)+")";


  		




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    }


  		




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}


  		












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