M Class Reference

Inheritance diagram for M:

Collaboration diagram for M:

Public Member Functions
double	attribute (Geometry geom)
String	getURI ()
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Member Function Documentation

attribute()

double attribute

(

Geometry

geom

)

                                               {
                if(geom.getGeometryType().equalsIgnoreCase("Point")) {
                        return geom.getCoordinate().getM();
                }
                return geom.getCentroid().getCoordinate().getM();
        }

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");

        }

getURI()

String getURI

(

)

References POSTGIS.st_m.

                               {
                return POSTGIS.st_m.stringValue();
        }