Application: gvSIG desktop

package com.iver.cit.gvsig.project.documents.table.operators;

import java.util.Date;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import bsh.EvalError;

import com.hardcode.gdbms.engine.data.driver.DriverException;

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.ExpresionFieldExtension;

import com.iver.cit.gvsig.fmap.drivers.FieldDescription;

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

import com.iver.cit.gvsig.project.documents.table.AbstractOperator;

import com.iver.cit.gvsig.project.documents.table.Index;

/**

 * @author Vicente Caballero Navarro

 */

public class Field extends AbstractOperator{

        private FieldDescription fd;

        public Field() {

        }

        public void setFieldDescription(FieldDescription fd) {

                this.fd=fd;

        }

        public String addText(String s) {

                return s.concat(toString()+"()");

        }

        public void eval(BSFManager interpreter) throws BSFException {

                interpreter.declareBean(fd.getFieldAlias(),this,Field.class);

                interpreter.eval(ExpresionFieldExtension.BEANSHELL,null,-1,-1,"java.lang.Object "+ fd.getFieldAlias()+ "(){return "+fd.getFieldAlias()+".getValue(indexRow,sds);};");

        }

        public Object getValue(Index indexRow,SelectableDataSource sds) {

                try {

                        int index=sds.getFieldIndexByName(fd.getFieldName());

                        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 (DriverException e) {

                        new EvalError(e.getMessage(),null,null);

                }

                return null;

        }

        public String toString() {

                return fd.getFieldAlias();

        }

        public boolean isEnable() {

                return true;

        }

}