Application: gvSIG desktop

package org.gvsig.operators;

import java.util.ArrayList;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import org.gvsig.baseclasses.GraphicOperator;

import org.gvsig.baseclasses.IOperator;

import org.gvsig.baseclasses.Index;

import org.gvsig.expresions.EvalOperatorsTask;

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

import com.iver.andami.messages.NotificationManager;

import com.iver.cit.gvsig.exceptions.expansionfile.ExpansionFileReadException;

import com.iver.cit.gvsig.fmap.core.FShape;

import com.iver.cit.gvsig.fmap.core.IGeometry;

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

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

/**

 * @author Vicente Caballero Navarro

 */

public class PointX extends GraphicOperator{

        public String addText(String s) {

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

        }

        public double process(Index index) throws DriverIOException {

                ReadableVectorial adapter = getLayer().getSource();

                IGeometry geom=null;

                try {

                        geom = adapter.getShape(index.get());

                } catch (ExpansionFileReadException e) {

                        throw new DriverIOException(e);

                } catch (ReadDriverException e) {

                        throw new DriverIOException(e);

                }

                ArrayList parts=getXY(geom);

                Double[][] xsys=(Double[][])parts.get(0);//getXY(geom);

                return xsys[0][0].doubleValue();

        }

        public void eval(BSFManager interpreter) throws BSFException {

                interpreter.declareBean("pointX",this,PointX.class);

//                interpreter.eval(ExpressionFieldExtension.BEANSHELL,null,-1,-1,"double x(){return pointX.process(indexRow);};");

                interpreter.exec(EvalOperatorsTask.JYTHON,null,-1,-1,"def x():\n" +

                                "  return pointX.process(indexRow)");

        }

        public String toString() {

                return "x";

        }

        public boolean isEnable() {

                if (getLayer()==null)

                        return false;

                ReadableVectorial adapter = getLayer().getSource();

                int type=FShape.POINT;

                try {

                        type=adapter.getShapeType();

                } catch (ReadDriverException e) {

                        NotificationManager.addError(e);

                }

                return (getType()==IOperator.NUMBER && type==FShape.POINT);

        }

        public String getTooltip(){

                return "operator"+":  "+addText("")+"\n"+getDescription();

        }

        public String getDescription() {

        return  "returns" + ": " +

         "numeric_value" + "\n" +

         "description" + ": " +

        "Returns the X coordenate of point geometry of this row.";

    }

}