RasterAlgebraFunction Class Reference

Inheritance diagram for RasterAlgebraFunction:

Collaboration diagram for RasterAlgebraFunction:

Public Member Functions
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
abstract GridCoverage	modify (GridCoverage coverage, Integer bd1, GridCoverage coverage2, Integer bd2)

Member Function Documentation

evaluate()

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

                                                                                                            {
                if (args.length != 4) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 4 arguments, got " + args.length);
                }
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                LiteralType l2=LiteralRegistry.getLiteral(((Literal)args[2]).getDatatype().toString());
                if(l instanceof RasterLiteral && l2 instanceof RasterLiteral) {
                        GridCoverage geom=((RasterLiteral)l).read(args[0].stringValue());
                        Integer bd1=Integer.valueOf(args[1].stringValue());
                        GridCoverage geom2=((RasterLiteral)l).read(args[2].stringValue());
                        Integer bd2=Integer.valueOf(args[3].stringValue());
                        GridCoverage result = modify(geom,bd1,geom2,bd2);
                        return valueFactory.createLiteral(((RasterLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                return null;
        }

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

Referenced by AddTest.testAdd(), AndTest.testAnd(), DivTest.testDiv(), LogTest.testLog(), MultTest.testMult(), OrTest.testOr(), SubtractTest.testSubtract(), and XorTest.testXor().

modify()

abstract GridCoverage modify ( GridCoverage  coverage, Integer  bd1, GridCoverage  coverage2, Integer  bd2  )

abstract

Reimplemented in Xor, Threshold, Subtract, Or, Mult, Min, Mean, Max, Log, IDFT, IDCT, Div, DCT, And, Add, and Abs.

Referenced by RasterAlgebraFunction.evaluate().