RasterGeometryConversionFunction Class Reference

Inheritance diagram for RasterGeometryConversionFunction:

Collaboration diagram for RasterGeometryConversionFunction:

Public Member Functions
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
abstract Geometry	construct (GridCoverage input)

Member Function Documentation

construct()

abstract Geometry construct ( GridCoverage  input )

abstract

Reimplemented in AsGeometry.

Referenced by RasterGeometryConversionFunction.evaluate().

evaluate()

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

                                                                                                            {
                if (args.length != 1) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 arguments, got " + args.length);
                }
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                GridCoverage coverage=((RasterLiteral)l).read(args[0].stringValue());
                Geometry result = construct(coverage);
                return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
        }

References RasterGeometryConversionFunction.construct(), and LiteralRegistry.getLiteral().