GeometricModifierStringFunction Class Reference

Inheritance diagram for GeometricModifierStringFunction:

Collaboration diagram for GeometricModifierStringFunction:

Public Member Functions
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Protected Member Functions
abstract Geometry	relation (Geometry geom, String value)

Member Function Documentation

evaluate()

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

                                                                                                            {
                if (args.length != 2) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 2 arguments, got " + args.length);
                }
 
                String value=args[1].stringValue();
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        Geometry result = relation(geom,value);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Arguments given are not geometry literals");
        }

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

Referenced by SwapOrdinatesTest.testSwapOrdinates().

relation()

abstract Geometry relation ( Geometry  geom, String  value  )

abstractprotected

Reimplemented in SwapOrdinates.

Referenced by GeometricModifierStringFunction.evaluate().