Points Class Reference

Inheritance diagram for Points:

Collaboration diagram for Points:

Public Member Functions
String	getURI ()
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Protected Member Functions
Geometry	operation (Geometry geom)

Member Function Documentation

evaluate()

Value evaluate ( ValueFactory  valueFactory, Value...  args  ) throws ValueExprEvaluationException

inherited

References LiteralRegistry.getLiteral(), and GeometricUnaryFunction.operation().

                                                                                                            {
                if (args.length != 2) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 2 arguments, got " + args.length);
                }
                
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        Geometry result = operation(geom);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
        }

getURI()

String getURI

(

)

References POSTGIS.st_points.

                               {
                return POSTGIS.st_points.stringValue();
        }

operation()

Geometry operation ( Geometry  geom )

protected

                                                    {
                GeometryFactory fac=new GeometryFactory();
        List<Point> res=new LinkedList<Point>();
        for(Coordinate coord:geom.getCoordinates()) {
                res.add(fac.createPoint(coord));
        }
        return fac.createMultiPoint(geom.getCoordinates());
        }