Polygon Class Reference

Creates a Polygon from a LineString given as a WKT String. More...

Inheritance diagram for Polygon:

Collaboration diagram for Polygon:

Public Member Functions
String	getURI ()
Geometry	construct (String input, Integer srid)
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Detailed Description

Creates a Polygon from a LineString given as a WKT String.

Member Function Documentation

construct()

Geometry construct	(	String	input,
		Integer	srid
	)

Reimplemented from GeometricConstructorInteger.

                                                              {
            WKTReader wktreader=new WKTReader();
            Geometry geom;
                        try {
                                geom = wktreader.read(input);
                    if("LINESTRING".equals(geom.getGeometryType().toUpperCase())){
                        return LiteralUtils.createGeometry(geom.getCoordinates(), "Polygon", srid);
                    }
                        } catch (ParseException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                        }     
 
            return null;
        }

References LiteralUtils.createGeometry().

evaluate()

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

inherited

                                                                                                            {
                if (args.length != 2) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 arguments, got " + args.length);
                }
 
                String input=args[0].stringValue();
                Integer srid = Integer.valueOf(args[1].stringValue());
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                if(l instanceof VectorLiteral) {
                        Geometry result = construct(input,srid);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Arguments given are not geometry literals");
        }

References GeometricConstructorInteger.construct(), and LiteralRegistry.getLiteral().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_polygon.stringValue();
        }

References POSTGIS.st_polygon.