Application: gvSIG desktop » gvSIG tools: Expression Field

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package org.gvsig.expressionfield.project.documents.table.operators;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import org.gvsig.expressionfield.ExpressionFieldExtension;

import org.gvsig.expressionfield.project.documents.table.AbstractOperator;

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

public abstract class AbstractField extends AbstractOperator{

        private boolean isEval=false;

        public Object getValue(Feature feature, String nameField){

                if (feature != null)

                        return feature.get(nameField);

                return null;

        }

//        public Object getValue(String nameField,Index indexRow,SelectableDataSource sds) {

//                try {

//                        int index=sds.getFieldIndexByName(nameField);

//                        Value value=sds.getFieldValue(indexRow.get(),index);

//                        if (value instanceof NumericValue) {

//                                double dv=((NumericValue)value).doubleValue();

//                                return new Double(dv);

//                        }else if (value instanceof DateValue) {

//                                Date date=((DateValue)value).getValue();

//                                return date;

//                        }else if (value instanceof BooleanValue){

//                                boolean b=((BooleanValue)value).getValue();

//                                return new Boolean(b);

//                        }else {

//                                return value.toString();

//                        }

//                } catch (ReadDriverException e) {

//                        throw new RuntimeException(e.getMessage());

//                }

//        }

        public void eval(BSFManager interpreter) throws BSFException {

                if (!isEval){

                interpreter.declareBean("jfield",this,Field.class);

                interpreter.exec(ExpressionFieldExtension.JYTHON,null,-1,-1,"def field(nameField):\n" +

                                "  return jfield.getValue(featureContainer.getFeature(), nameField)");

                isEval=true;

                }

        }

}