RasterAlgebraConstFunction Class Reference

Inheritance diagram for RasterAlgebraConstFunction:

Collaboration diagram for RasterAlgebraConstFunction:

Public Member Functions
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
abstract GridCoverage	modify (GridCoverage coverage, Integer band, Double constt)

Member Function Documentation

evaluate()

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

                                                                                                            {
                if (args.length != 3) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 3 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 band=Integer.valueOf(args[1].stringValue());
                        Double constt=Double.valueOf(args[2].stringValue());
                        GridCoverage result = modify(geom,band,constt);
                        return valueFactory.createLiteral(((RasterLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                return null;
        }

References LiteralRegistry.getLiteral(), and RasterAlgebraConstFunction.modify().

Referenced by AddConstTest.testAddConst(), AndConstTest.testAndConst(), DivConstTest.testDivConst(), MultConstTest.testMultConst(), OrConstTest.testOrConst(), SubtractConstTest.testSubtractConst(), and XorConstTest.testXorConst().

modify()

abstract GridCoverage modify ( GridCoverage  coverage, Integer  band, Double  constt  )

abstract

Reimplemented in XorConst, SubtractConst, OrConst, MultConst, DivConst, AndConst, and AddConst.

Referenced by RasterAlgebraConstFunction.evaluate().