RasterAttributeIntIntGeomFunction Class Reference

Inheritance diagram for RasterAttributeIntIntGeomFunction:

Collaboration diagram for RasterAttributeIntIntGeomFunction:

Public Member Functions
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
abstract Geometry	attribute (GridCoverage geom, Integer longitude, Integer latitude)

Member Function Documentation

attribute()

abstract Geometry attribute ( GridCoverage  geom, Integer  longitude, Integer  latitude  )

abstract

Reimplemented in WorldToRasterCoord, RasterToWorldCoord, and PixelAsPoint.

Referenced by RasterAttributeIntIntGeomFunction.evaluate().

evaluate()

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

                                                                                                            {
                if (args.length != 3) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 arguments, got " + args.length);
                }
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                if(l instanceof RasterLiteral) {
                        GridCoverage geom=((RasterLiteral)l).read(args[0].stringValue());
                        Integer longitude = Integer.valueOf(args[1].stringValue());
                        Integer latitude = Integer.valueOf(args[2].stringValue());
                        Geometry result = attribute(geom,longitude,latitude);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                return null;
        }

References RasterAttributeIntIntGeomFunction.attribute(), and LiteralRegistry.getLiteral().

Referenced by RasterToWorldCoordTest.testRasterToWorldCoord(), and WorldToRasterCoordTest.testWorldToRasterCoord().