SetInteriorRing Class Reference

Sets an interior ring replacing an already existing interior ring of a polygon. More...

Inheritance diagram for SetInteriorRing:

Collaboration diagram for SetInteriorRing:

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

Protected Member Functions
Geometry	relation (Geometry geom, Geometry geom2, Integer value)

Detailed Description

Sets an interior ring replacing an already existing interior ring of a polygon.

Member Function Documentation

evaluate()

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

inherited

                                                                                                            {
                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 transformed=LiteralUtils.transform(geom2, geom);
                        Geometry result = relation(geom,transformed,value);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Arguments given are not geometry literals");
        }

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

Referenced by SetGeometryTest.testSetGeometry(), SetGeometryTest.testSetGeometryZ(), and SetRingTest.testSetRing().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_setInteriorRing.toString();
        }

References POSTGIS.st_setInteriorRing.

relation()

Geometry relation ( Geometry  geom, Geometry  geom2, Integer  value  )

protected

Reimplemented from GeometricModifierGeometryIntegerFunction.

                                                                                  {
                if(geom instanceof Polygon) {
                        Polygon poly=(Polygon) geom;
                        List<LinearRing> rings=new LinkedList<LinearRing>();
                        for(int i=0;i<poly.getNumInteriorRing();i++) {
                                if(i==value) {
                                        rings.add((LinearRing)geom2);
                                }
                        }
                        GeometryFactory fac=new GeometryFactory();
                        return fac.createPolygon((LinearRing)poly.getExteriorRing(), rings.toArray(new LinearRing[0]));
                }
                return null;
        }