IsMorePrecise Class Reference

Inheritance diagram for IsMorePrecise:

Collaboration diagram for IsMorePrecise:

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

Protected Member Functions
int	relation (Geometry geom, Geometry geom2)

Member Function Documentation

evaluate()

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

inherited

                                                                                                            {
                if (args.length != 2) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 2 arguments, got " + args.length);
                }
 
                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);
                        double result = relation(geom,transformed);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Arguments given are not a geometry literal");
 
        }

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

Referenced by IsMorePreciseTest.testIsMorePreciseEqual(), IsMorePreciseTest.testIsMorePreciseFirst(), and IsMorePreciseTest.testIsMorePreciseSecond().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_isMorePrecise.stringValue();
        }

References POSTGIS.st_isMorePrecise.

relation()

int relation ( Geometry  geom, Geometry  geom2  )

protected

Reimplemented from GeometricRelationIntegerFunction.

                                                              {
            if(geom.getPrecisionModel().getMaximumSignificantDigits()>geom2.getPrecisionModel().getMaximumSignificantDigits()) {
                return 1;
            }else if(geom.getPrecisionModel().getMaximumSignificantDigits()==geom2.getPrecisionModel().getMaximumSignificantDigits()) {
                return 0;
            }else {
                return -1;
            }
        }