AsTextRound Class Reference

Returns a WKT representation of a given geometry with a given precision. More...

Inheritance diagram for AsTextRound:

Collaboration diagram for AsTextRound:

Public Member Functions
String	operation (Geometry geom, Integer value)
String	getURI ()
Value	evaluate (ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException

Detailed Description

Returns a WKT representation of a given geometry with a given precision.

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());
                Integer value=Integer.valueOf(args[1].stringValue());
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        String result = operation(geom,value);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
                
        }

References LiteralRegistry.getLiteral(), and GeometricStringExportIntegerFunction.operation().

Referenced by AsTextRoundTest.testAsTextRound().

getURI()

String getURI

(

)

                               {
                return POSTGIS.ST_ASTEXTROUND.stringValue();
        }

References POSTGIS.ST_ASTEXTROUND.

operation()

String operation	(	Geometry	geom,
		Integer	value
	)

Reimplemented from GeometricStringExportIntegerFunction.

                                                             {
        PrecisionModel pm = new PrecisionModel(Math.pow(10.0, value));
        Geometry geom_mod=GeometryPrecisionReducer.reduce(geom, pm);
        return geom_mod.toText();
        }