com.yahoo.sketches.tuple

Class Intersection<S extends Summary>

java.lang.Object

com.yahoo.sketches.tuple.Intersection<S>

Type Parameters:

S - Type of Summary

public class Intersection<S extends Summary>
extends Object

Computes an intersection of two or more generic tuple sketches. A new instance represents the Universal Set. Every update() computes an intersection with the internal set and can only reduce the internal set.

Constructor Summary

Constructors

Constructor and Description
Intersection(SummaryFactory<S> summaryFactory) Creates new instance

Method Summary

Modifier and Type	Method and Description
CompactSketch<S>	getResult() Gets the internal set as a CompactSketch
void	reset() Resets the internal set to the initial state, which represents the Universal Set
void	update(Sketch<S> sketchIn) Updates the internal set by intersecting it with the given sketch

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Intersection

public Intersection(SummaryFactory<S> summaryFactory)

Creates new instance

Parameters:

summaryFactory - the summary factory

Method Detail

update

public void update(Sketch<S> sketchIn)

Updates the internal set by intersecting it with the given sketch

Parameters:

sketchIn - input sketch to intersect with the internal set

getResult

public CompactSketch<S> getResult()

Gets the internal set as a CompactSketch

Returns:

result of the intersections so far

reset

public void reset()

Resets the internal set to the initial state, which represents the Universal Set