BandNoDataValue Class Reference

Inheritance diagram for BandNoDataValue:

Collaboration diagram for BandNoDataValue:

Public Member Functions
String	getURI ()
Integer	attribute (GridCoverage coverage, Integer bandno)
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Member Function Documentation

attribute()

Integer attribute	(	GridCoverage	coverage,
		Integer	bandno
	)

Reimplemented from RasterAttributeIntIntFunction.

                                                                       {
                return coverage.getSampleDimensions().get(bandno).getNoDataValues().iterator().next().intValue();
        }

evaluate()

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

inherited

                                                                                                    {
        if (args.length != 2) {
                throw new ValueExprEvaluationException(getURI() + " requires exactly 2 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 parameter = Integer.valueOf(args[1].stringValue());
                Integer result = attribute(geom,parameter);
                return valueFactory.createLiteral(result);
        }
        return null;
}

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

Referenced by BandTest.testBand(), and BandNoDataValueTest.testBandNoDataValue().

getURI()

String getURI

(

)

                               {
                return POSTGIS.ST_BANDNODATAVALUE.stringValue();
        }

References POSTGIS.ST_BANDNODATAVALUE.