CollectionHomogenize Class Reference

Inheritance diagram for CollectionHomogenize:

Collaboration diagram for CollectionHomogenize:

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

Protected Member Functions
Geometry	operation (Geometry collection)

Member Function Documentation

evaluate()

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

inherited

                                                                                                            {
                if (args.length != 1) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 1 argument, got " + args.length);
                }
                
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        Geometry result = operation(geom);
                        return valueFactory.createLiteral(((VectorLiteral) l).unparse(result),((Literal)args[0]).getDatatype());
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
        }

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

Referenced by BoundaryTest.testBoundary(), BoundingDiagonalTest.testBoundingDiagonal(), CentroidTest.testCentroid(), StartPointTest.testCircularString(), CircumcentreTest.testCircumcentre1(), CollectionHomogenizeTest.testCollectionHomogenize(), FlipCoordinatesTest.testFlipCoordinates(), Force2DTest.testForce2D(), Force3DTest.testForce3D(), Force3DMTest.testForce3DM(), Force3DMTest.testForce3DM2(), Force4DTest.testForce4D(), ForceCollectionTest.testForceCollection(), ForceCollectionTest.testForceCollectionZ(), ForcePolygonCCWTest.testForcePolygonCCW(), ForcePolygonCWTest.testForcePolygonCW(), EndPointTest.testLineString2D(), StartPointTest.testLineString2D(), EndPointTest.testLineString3D(), StartPointTest.testLineString3D(), MinimumBoundingCircleCenterTest.testMinimumBoundingCircle(), MinimumBoundingCircleTest.testMinimumBoundingCircle(), MinimumClearanceLineTest.testMinimumClearanceLine(), MinimumDiameterLineTest.testMinimumDiameterLine(), MinimumRectangleTest.testMinimumRectangle(), MultiTest.testMulti2D(), MultiTest.testMulti3D(), SelfIntersectionsTest.testNoSelfIntersections(), EndPointTest.testPoint(), StartPointTest.testPoint(), PointsTest.testPoints(), PointsTest.testPoints3D(), ReverseTest.testReverse(), SelfIntersectionsTest.testSelfIntersections(), ShiftLongitudeTest.testShiftLongitude(), SimplifyPreserveTopologyTest.testSimplifyVW(), and TransScaleTest.testTransScale().

getURI()

String getURI

(

)

                               {
                return POSTGIS.ST_COLLECTIONHOMOGENIZE.stringValue();
        }

References POSTGIS.ST_COLLECTIONHOMOGENIZE.

operation()

Geometry operation ( Geometry  collection )

protected

Reimplemented from GeometricUnaryFunction.

                                                          {
             GeometryFactory fac=new GeometryFactory();
                 if(collection.getNumGeometries()==1) {
                Geometry singlegeom=collection.getGeometryN(0);
                return singlegeom;
             }else if(collection.getNumGeometries()==0) {
                return collection;
             }else {
                switch(collection.getGeometryN(0).getGeometryType()) {
                 case "Point":
                        List<Coordinate> coords=new ArrayList<Coordinate>();
                        for(int i=0;i<collection.getNumGeometries();i++) {
                                for(Coordinate coord2:collection.getGeometryN(i).getCoordinates()) {
                                        coords.add(coord2);
                                }
                        }
                        return fac.createMultiPointFromCoords(coords.toArray(new Coordinate[0]));
                 case "LineString":
                        List<LineString> lines=new ArrayList<LineString>();
                        for(int i=0;i<collection.getNumGeometries();i++) {
                                        lines.add((LineString)collection.getGeometryN(i));
                        }
                        return fac.createMultiLineString(lines.toArray(new LineString[0]));
                 case "Polygon": 
                        List<Polygon> polys=new ArrayList<Polygon>();
                        for(int i=0;i<collection.getNumGeometries();i++) {
                                        polys.add((Polygon)collection.getGeometryN(i));
                        }
                        return fac.createMultiPolygon(polys.toArray(new Polygon[0]));
                }
             }
                 return null;
        }