Module org.elasticsearch.geo

Package org.elasticsearch.geometry.simplify

Interface StreamingGeometrySimplifier.Monitor

Enclosing class:

StreamingGeometrySimplifier<T extends Geometry>

public static interface StreamingGeometrySimplifier.Monitor

Implementation of this interface will receive calls with internal data at each step of the simplification algorithm. This is of use for debugging complex cases, as well as gaining insight into the way the algorithm works. Data provided in the callback includes:

• String description of current process
• List of points in current simplification
• Last point removed from the simplification

mode, list of points representing the current linked-list of internal nodes used for triangulation, and a list of triangles so far created by the algorithm.

Method Summary

Modifier and Type	Method	Description
void	endSimplification(String description, List<SimplificationErrorCalculator.PointLike> points)	When simplification or sub-simplification is completed, this is called.
void	pointAdded(String status, List<SimplificationErrorCalculator.PointLike> points)	Every time a point is added to the collection, this method sends the resulting state
void	pointRemoved(String status, List<SimplificationErrorCalculator.PointLike> points, SimplificationErrorCalculator.PointLike removed, double error, SimplificationErrorCalculator.PointLike previous, SimplificationErrorCalculator.PointLike next)	Every time a point is added and another is removed from the collection, this method sends the resulting state
void	startSimplification(String description, int maxPoints)	When a new simplification or sub-simplification starts, this provides a description of the simplification, as well as the current maxPoints target for this simplification.

Method Details

pointAdded

void pointAdded(String status,
 List<SimplificationErrorCalculator.PointLike> points)

Every time a point is added to the collection, this method sends the resulting state

pointRemoved

void pointRemoved(String status,
 List<SimplificationErrorCalculator.PointLike> points,
 SimplificationErrorCalculator.PointLike removed,
 double error,
 SimplificationErrorCalculator.PointLike previous,
 SimplificationErrorCalculator.PointLike next)

Every time a point is added and another is removed from the collection, this method sends the resulting state

startSimplification

void startSimplification(String description,
 int maxPoints)

When a new simplification or sub-simplification starts, this provides a description of the simplification, as well as the current maxPoints target for this simplification. For a single simplification, maxPoints will simply be the value passed to the constructor, but compound simplifications will calculate smaller numbers for sub-simplifications (eg. holes in polygons, or shells in multi-polygons).

endSimplification

void endSimplification(String description,
 List<SimplificationErrorCalculator.PointLike> points)

When simplification or sub-simplification is completed, this is called.