NumInteriorRings Class Reference

Returns the number of interior rings of a polygon. More...

Inheritance diagram for NumInteriorRings:

Collaboration diagram for NumInteriorRings:

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

Detailed Description

Returns the number of interior rings of a polygon.

Member Function Documentation

attribute()

int attribute

(

Geometry

geom

)

Reimplemented from GeometricIntegerAttributeFunction.

                                            {
                if(geom instanceof Polygon) {
                        Polygon poly=(Polygon)geom;
                        Set<Geometry> coordset=new HashSet<Geometry>();
                        for(int i=0;i<poly.getNumInteriorRing();i++) {
                                coordset.add(geom.getGeometryN(i));
                        }
                        return coordset.size();
                }
                return 0;
                
        }

evaluate()

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

inherited

                                                                                                            {
                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());
                        int result = attribute(geom);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
        }

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

Referenced by NDimsTest.test2DGeom(), NDimsTest.test3DGeom(), NDimsTest.testMGeom(), NRingsTest.testNRings(), NumDistinctInteriorRingsTest.testNRings(), NumDistinctGeometriesTest.testNumDistinctGeometries(), NumDistinctGeometriesTest.testNumDistinctGeometriesCollection(), NumDistinctPointsTest.testNumDistinctPoints(), NumGeometriesTest.testNumGeometries(), NumGeometriesTest.testNumGeometriesCollection(), NumPointsTest.testNumPoints(), and OrientationTest.testOrientation().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_numInteriorRings.stringValue();
        }

References POSTGIS.st_numInteriorRings.