FullyWithinDistance Class Reference

Inheritance diagram for FullyWithinDistance:

Collaboration diagram for FullyWithinDistance:

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

Protected Member Functions
boolean	relation (Geometry g1, Geometry g2, Double distance)

Private Member Functions
double	getMaxDistance (Geometry geom1, Geometry geom2)

Member Function Documentation

evaluate()

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

inherited

                                                                                                                    {
                        if (args.length != 3) {
                                throw new ValueExprEvaluationException(getURI() + " requires exactly 3 arguments, got " + args.length);
                        }
 
                        LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                        LiteralType l2=LiteralRegistry.getLiteral(((Literal)args[1]).getDatatype().toString());
                        Double value=Double.valueOf(args[2].stringValue());
                        if(l instanceof VectorLiteral && l2 instanceof VectorLiteral) {
                                Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                                Geometry geom2=((VectorLiteral)l2).read(args[1].stringValue());
                                Geometry transformed=LiteralUtils.transform(geom2, geom);
                                boolean result = relation(geom,transformed,value);
                                return valueFactory.createLiteral(result);
                        }
                        throw new ValueExprEvaluationException("Arguments given are not a geometry literal");
 
                }

References LiteralRegistry.getLiteral(), GeometricRelationDoubleBinaryFunction.relation(), and LiteralUtils.transform().

Referenced by FullyWithinDistanceTest.testFullyWithinDistanceFalse(), and FullyWithinDistanceTest.testFullyWithinDistanceTrue().

getMaxDistance()

double getMaxDistance ( Geometry  geom1, Geometry  geom2  )

private

                                                                     {
                Double maxDistance=0.;
                Geometry transformed=LiteralUtils.transform(geom2, geom1);
                        for(Coordinate coord:geom1.getCoordinates()) {
                                for(Coordinate coord2:transformed.getCoordinates()) {
                                        Double curdistance=coord.distance(coord2);
                                        if(curdistance>maxDistance) {
                                                maxDistance=curdistance;
                                        }
                                }
                        }
                        return maxDistance;
        }

References LiteralUtils.transform().

Referenced by FullyWithinDistance.relation().

getURI()

String getURI

(

)

                               {
                return POSTGIS.ST_DWITHIN.stringValue();
        }

References POSTGIS.ST_DWITHIN.

relation()

boolean relation ( Geometry  g1, Geometry  g2, Double  distance  )

protected

Reimplemented from GeometricRelationDoubleBinaryFunction.

                                                                              {
                double maxdistance=getMaxDistance(g1,g2);
                System.out.println(distance+" - "+maxdistance);
                if(distance<=maxdistance) {
                        return true;
                }
                return false;
        }

References FullyWithinDistance.getMaxDistance().