PointInsideCircle Class Reference

Returns true if a point is found within the bounds of a given circle defintion. More...

Inheritance diagram for PointInsideCircle:

Collaboration diagram for PointInsideCircle:

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

Protected Member Functions
boolean	relation (Geometry geom, Double centerx, Double centery, Double radius)

Detailed Description

Returns true if a point is found within the bounds of a given circle defintion.

Member Function Documentation

evaluate()

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

inherited

                                                                                                            {
                if (args.length != 4) {
                        throw new ValueExprEvaluationException(getURI() + " requires exactly 3 arguments, got " + args.length);
                }
 
                LiteralType l=LiteralRegistry.getLiteral(((Literal)args[0]).getDatatype().toString());
                Double value=Double.valueOf(args[1].stringValue());
                Double value2=Double.valueOf(args[2].stringValue());
                Double value3=Double.valueOf(args[3].stringValue());
                if(l instanceof VectorLiteral) {
                        Geometry geom=((VectorLiteral)l).read(args[0].stringValue());
                        Boolean result = relation(geom,value,value2,value3);
                        return valueFactory.createLiteral(result);
                }
                throw new ValueExprEvaluationException("Argument given is not a geometry literal");
        }

References LiteralRegistry.getLiteral(), and GeometricModifierDoubleDoubleDoubleFunction.relation().

Referenced by PointInsideCircleTest.testPointInsideCircleFalse(), and PointInsideCircleTest.testPointInsideCircleTrue().

getURI()

String getURI

(

)

                               {
                return POSTGIS.st_pointInsideCircle.stringValue();
        }

References POSTGIS.st_pointInsideCircle.

relation()

boolean relation ( Geometry  geom, Double  centerx, Double  centery, Double  radius  )

protected

Reimplemented from GeometricModifierDoubleDoubleDoubleFunction.

                                                                                                 {
                 if("POINT".equals(geom.getGeometryType().toUpperCase())){
                        GeometricShapeFactory shapeFactory = new GeometricShapeFactory();
                     shapeFactory.setNumPoints(32);
                     shapeFactory.setCentre(new Coordinate(centerx, centery));
                     shapeFactory.setSize(radius * 2);
                     Polygon circle=shapeFactory.createCircle();
                     return circle.contains(geom);
             }
                 return false;
        }