Multi Class Reference

Inheritance diagram for Multi:

Collaboration diagram for Multi:

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

Protected Member Functions
Geometry	operation (Geometry geom)

Member Function Documentation

evaluate()

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

inherited

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

                                                                                                            {
                if (args.length != 2) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 2 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());
                        Geometry result = operation(geom);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
        }

getURI()

String getURI

(

)

References POSTGIS.st_multi.

                               {
                return POSTGIS.st_multi.stringValue();
        }

operation()

Geometry operation ( Geometry  geom )

protected

References LiteralUtils.createGeometry().

                                                    {
        if(geom.getGeometryType().toUpperCase().contains("MULTI")) {
                return geom;
        }
        switch(geom.getGeometryType()) {
        case "Point": 
                return LiteralUtils.createGeometry(geom.getCoordinates(), "MultiPoint", geom.getSRID());
        case "Polygon":
                List<Polygon> polylist=new LinkedList<Polygon>();
                polylist.add((Polygon)geom);
                return LiteralUtils.createGeometry(geom.getCoordinates(), "MultiPolygon", geom.getSRID());      
        case "LineString":
                List<LineString> linelist=new LinkedList<LineString>();
                linelist.add((LineString)geom);
                return LiteralUtils.createGeometry(geom.getCoordinates(), "MultiLineString", geom.getSRID());   
        default:
                return null;
        }
        }