RasterRelationBooleanFunction Class Reference

Inheritance diagram for RasterRelationBooleanFunction:

Collaboration diagram for RasterRelationBooleanFunction:

Public Member Functions
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
abstract Boolean	relation (GridCoverage coverage1, GridCoverage coverage2)

Member Function Documentation

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());
                LiteralType l2=LiteralRegistry.getLiteral(((Literal)args[1]).getDatatype().toString());
                if(l instanceof RasterLiteral && l2 instanceof RasterLiteral) {
                        GridCoverage geom=((RasterLiteral)l).read(args[0].stringValue());
                        GridCoverage geom2=((RasterLiteral)l).read(args[1].stringValue());
                        Boolean result = relation(geom,geom2);
                        return valueFactory.createLiteral(result);
                }
                return null;
        }

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

relation()

abstract Boolean relation ( GridCoverage  coverage1, GridCoverage  coverage2  )

abstract

Reimplemented in SameAlignment.

Referenced by RasterRelationBooleanFunction.evaluate().