Zmflag Class Reference

Inheritance diagram for Zmflag:

Collaboration diagram for Zmflag:

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

Member Function Documentation

evaluate()

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

inherited

References LiteralRegistry.getLiteral(), and GeometricStringExportFunction.operation().

                                                                                                            {
                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());
                        String result = operation(geom);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
                
        }

getURI()

String getURI

(

)

References POSTGIS.st_zmFlag.

                               {
                return POSTGIS.st_zmFlag.stringValue();
        }

operation()

String operation

(

Geometry

geom

)

References Coordinate.getM(), and Coordinate.getZ().

                                               {
                    Coordinate coord=geom.getCoordinates()[0];
                    if(Double.isNaN(coord.getM()) && Double.isNaN(coord.getZ())) {
                        return "0";
                    }else if(!Double.isNaN(coord.getM()) && Double.isNaN(coord.getZ())) {
                        return "1";
                    }else if(Double.isNaN(coord.getM()) && !Double.isNaN(coord.getZ())) {
                        return "2";
                    }else if(!Double.isNaN(coord.getM()) && !Double.isNaN(coord.getZ())) {
                        return "3";
                    }
                    return null;
        }