IsClosed Class Reference

Inheritance diagram for IsClosed:

Collaboration diagram for IsClosed:

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

Member Function Documentation

attribute()

boolean attribute

(

Geometry

geom

)

                                                {
                if(geom instanceof Point)
                return true;
        if(geom instanceof MultiPoint) {
                GeometryFactory fac=new GeometryFactory();
                LineString line=fac.createLineString(((MultiPoint)geom).getCoordinates());
                return line.isClosed();         
        }
        if (geom instanceof LineString) {
            boolean isClosed = ((LineString) geom).isClosed();
            return isClosed;
        }
        if (geom instanceof Polygon) {
            return true;
        }

        return false;
        }

evaluate()

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

inherited

References GeometricBinaryAttributeFunction.attribute(), and LiteralRegistry.getLiteral().

                                                                                                            {
                if (args.length != 1) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 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());
                        boolean result = attribute(geom);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");

        }

getURI()

String getURI

(

)

References POSTGIS.st_isClosed.

                               {
                return POSTGIS.st_isClosed.stringValue();
        }