Application: gvSIG desktop

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

import java.util.ArrayList;

import org.apache.bsf.BSFException;

import org.apache.bsf.BSFManager;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.ExpresionFieldExtension;

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;

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

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

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

/**

 * @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=adapter.getShape(index.get());

                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(ExpresionFieldExtension.BEANSHELL,null,-1,-1,"double x(){return pointX.process(indexRow);};");

                interpreter.exec(ExpresionFieldExtension.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 (DriverIOException e) {

                        e.printStackTrace();

                }

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

        }

        public String getTooltip(){

                return PluginServices.getText(this,"operator")+":  "+addText("")+"\n"+getDescription();

        }

        public String getDescription() {

        return PluginServices.getText(this, "returns") + ": " +

        PluginServices.getText(this, "numeric_value") + "\n" +

        PluginServices.getText(this, "description") + ": " +

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

    }

}