Application: gvSIG desktop

package org.gvsig.operators;

import java.util.Date;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import org.gvsig.baseclasses.AbstractOperator;

import org.gvsig.baseclasses.Index;

import org.gvsig.expresions.EvalOperatorsTask;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.hardcode.gdbms.engine.values.BooleanValue;

import com.hardcode.gdbms.engine.values.DateValue;

import com.hardcode.gdbms.engine.values.NumericValue;

import com.hardcode.gdbms.engine.values.Value;

import com.iver.cit.gvsig.fmap.layers.SelectableDataSource;

public abstract class AbstractField extends AbstractOperator{

        private boolean isEval=false;

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

                                "  return jfield.getValue(nameField,indexRow,sds)");

                isEval=true;

                }

        }

}