GeometricRasterFunction Class Reference

Inheritance diagram for GeometricRasterFunction:

Collaboration diagram for GeometricRasterFunction:

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

Protected Member Functions
abstract Geometry	relation (Geometry geom, String pixeltype, Double value, Double nodataval, Boolean touched)

Member Function Documentation

evaluate()

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

                                                                                                            {
                if (args.length != 5) {
                        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());
                        String pixeltype=args[1].stringValue();
                        Double value=Double.valueOf(args[2].stringValue());
                        Double nodata=Double.valueOf(args[3].stringValue());
                        Boolean touched=Boolean.valueOf(args[4].stringValue());
                        Geometry result = relation(geom,pixeltype,value,nodata,touched);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Arguments given are not geometry literals");
        }

References LiteralRegistry.getLiteral(), and GeometricRasterFunction.relation().

relation()

abstract Geometry relation ( Geometry  geom, String  pixeltype, Double  value, Double  nodataval, Boolean  touched  )

abstractprotected

Reimplemented in AsRaster.

Referenced by GeometricRasterFunction.evaluate().