Snap Class Reference

Inheritance diagram for Snap:

Collaboration diagram for Snap:

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

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

Member Function Documentation

evaluate()

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

inherited

References LiteralRegistry.getLiteral(), and GeometricModifierGeometryIntegerFunction.relation().

                                                                                                            {
                if (args.length != 3) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 3 arguments, got " + args.length);
                }

                Integer value=Integer.valueOf(args[2].stringValue());
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                LiteralType l2=LiteralRegistry.getLiteral(((Literal)args[1]).getDatatype().toString());
                if(l instanceof VectorLiteral && l2 instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        Geometry geom2=((VectorLiteral)l2).read(args[1].stringValue());
                        Geometry result = relation(geom,geom2,value);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Arguments given are not geometry literals");
        }

getURI()

String getURI

(

)

References POSTGIS.st_snap.

                               {
                return POSTGIS.st_snap.stringValue();
        }

relation()

Geometry relation ( Geometry  g1, Geometry  g2, Integer  tolerance  )

protected

                                                                                {
                GeometrySnapper snapper = new GeometrySnapper(g1);
        Geometry snapGeom = snapper.snapTo(g2, tolerance);
                return snapGeom;
        }