CompactnessRatio Class Reference

Inheritance diagram for CompactnessRatio:

Collaboration diagram for CompactnessRatio:

Public Member Functions
boolean	isSupported (KiWiDialect dialect)
String	getNative (KiWiDialect dialect, String... args)
ValueType	getReturnType ()
ValueType	getArgumentType (int arg)
int	getMinArgs ()
int	getMaxArgs ()
double	attribute (Geometry geom)
String	getURI ()
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Member Function Documentation

attribute()

double attribute ( Geometry  geom )

inherited

                                               {
                if (geom instanceof Polygon) {
            final double circleRadius = Math.sqrt(geom.getArea() / Math.PI);
            final double circleCurcumference = 2 * Math.PI * circleRadius;
            return circleCurcumference / geom.getLength();
        }
                return Double.NaN;
        }

evaluate()

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

inherited

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

                                                                                                            {
                if (args.length != 1) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 arguments, got " + args.length);
                }

                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        double result = attribute(geom);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");

        }

getArgumentType()

ValueType getArgumentType

(

int

arg

)

                                                  {
                // TODO Auto-generated method stub
                return null;
        }

getMaxArgs()

int getMaxArgs

(

)

                                {
                // TODO Auto-generated method stub
                return 0;
        }

getMinArgs()

int getMinArgs

(

)

                                {
                // TODO Auto-generated method stub
                return 0;
        }

getNative()

String getNative	(	KiWiDialect	dialect,
		String...	args
	)

                                                                     {
                // TODO Auto-generated method stub
                return null;
        }

getReturnType()

ValueType getReturnType

(

)

                                         {
                // TODO Auto-generated method stub
                return null;
        }

getURI()

String getURI ( )

inherited

References POSTGIS.ST_COMPACTNESSRATIO.

                               {
                return POSTGIS.ST_COMPACTNESSRATIO.stringValue();
        }

isSupported()

boolean isSupported

(

KiWiDialect

dialect

)

                                                        {
                // TODO Auto-generated method stub
                return false;
        }