ClosestPoint3D Class Reference

Inheritance diagram for ClosestPoint3D:

Collaboration diagram for ClosestPoint3D:

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

Protected Member Functions
Geometry	relation (Geometry g1, Geometry g2)

Member Function Documentation

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());
                LiteralType l2=LiteralRegistry.getLiteral(((Literal)args[1]).getDatatype().toString());
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        Geometry geom2=((VectorLiteral)l2).read(args[1].stringValue());
                        Geometry transformed=LiteralUtils.transform(geom2, geom);
                        Geometry result = relation(geom,transformed);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
        }

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

Referenced by AddGeometryTest.testAddGeometry(), AddGeometryTest.testAddGeometryZ(), AddPointTest.testAddPoint(), AddPointTest.testAddPointZ(), AddRingTest.testAddRing(), ClosestPointTest.testClosestPoint(), FurthestCoordinateTest.testFurthestCoordinate(), SetEndPointTest.testSetEndPoint(), and SetStartPointTest.testSetStartPoint().

getURI()

String getURI

(

)

                               {
                return POSTGIS.ST_CLOSESTPOINT3D.stringValue();
        }

References POSTGIS.ST_CLOSESTPOINT3D.

relation()

Geometry relation ( Geometry  g1, Geometry  g2  )

protected

Reimplemented from GeometricModifierFunction.

                                                              {
                Distance3DOp distop = new Distance3DOp(g1, g2);
                Coordinate[] coords = distop.nearestPoints();
                Coordinate coord = new Coordinate(coords[0].x, coords[0].y);
                GeometryFactory fac=new GeometryFactory();
                return fac.createPoint(coord);
        }