ManhattanDistance Class Reference

Inheritance diagram for ManhattanDistance:

Collaboration diagram for ManhattanDistance:

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

Protected Member Functions
double	relation (Geometry geom1, 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(), GeometricRelationDoubleFunction.relation(), and LiteralUtils.transform().

Referenced by AreaSimilarityTest.testAreaSimilarity(), AreaSimilarityTest.testAreaSimilarity2(), BBOXDistanceTest.testBBOXDistance(), CentroidDistanceTest.testCentroidDistance(), CentroidDistanceTest.testCentroidDistance2(), DistanceSphereTest.testDistanceSphere(), DistanceSphereTest.testDistanceSphere2(), HausdorffDistanceTest.testHausdorffDistance(), IntersectionPercentageTest.testIntersectionPercentage(), IntersectionPercentageTest.testIntersectionPercentage2(), ManhattanDistanceTest.testManhattanDistance(), MaxDistanceTest.testMaxDistance(), and MaxDistance3DTest.testMaxDistance3D().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_manhattandistance.stringValue();
        }

References POSTGIS.st_manhattandistance.

relation()

double relation ( Geometry  geom1, Geometry  geom2  )

protected

Reimplemented from GeometricRelationDoubleFunction.

                                                                  {
                Coordinate coord1=null,coord2=null;
                if(geom1 instanceof Point) {
                        coord1=((Point)geom1).getCoordinate();
                }else {
                        coord1=geom1.getCentroid().getCoordinate();
                }
                if(geom2 instanceof Point) {
                        coord2=((Point)geom2).getCoordinate();
                }else {
                        coord2=geom2.getCentroid().getCoordinate();
                }               
            return Math.abs(coord1.x - coord2.x) + Math.abs(coord1.y - coord2.y);       
        }