RasterAttributeStringFunction Class Reference

Inheritance diagram for RasterAttributeStringFunction:

Collaboration diagram for RasterAttributeStringFunction:

Public Member Functions
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
abstract String	attribute (GridCoverage geom)

Member Function Documentation

attribute()

abstract String attribute ( GridCoverage  geom )

abstract

Reimplemented in Summary.

Referenced by RasterAttributeStringFunction.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);
                }
                System.out.println(((Literal)args[0]).getDatatype().toString());
                System.out.println(LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString()));
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                System.out.println(l);
                if(l instanceof RasterLiteral) {
                        GridCoverage geom=((RasterLiteral)l).read(args[0].stringValue());
                        //System.out.println("Extracted GridCoverage: "+geom);
                        String result = attribute(geom);
                        return valueFactory.createLiteral(result);
                }
                return null;
        }

References RasterAttributeStringFunction.attribute(), and LiteralRegistry.getLiteral().

Referenced by SampleRasters.displayRasterSummary().