Class SetOperationCornerCases

java.lang.Object

org.apache.datasketches.thetacommon.SetOperationCornerCases

public class SetOperationCornerCases
extends Object

Simplifies and speeds up set operations by resolving specific corner cases.

Author:

Lee Rhodes

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	SetOperationCornerCases.AnotbAction	A not B actions
static enum	SetOperationCornerCases.CornerCase	List of corner cases
static enum	SetOperationCornerCases.IntersectAction	Intersection actions
static enum	SetOperationCornerCases.UnionAction	List of union actions

Constructor Summary

Constructors

Constructor	Description
SetOperationCornerCases()	No argument constructor.

Method Summary

Modifier and Type	Method	Description
static int	createCornerCaseId(long thetaLongA, int countA, boolean emptyA, long thetaLongB, int countB, boolean emptyB)	Creates the CornerCase ID
static int	sketchStateId(boolean isEmpty, int numRetained, long thetaLong)	Returns the sketch state ID

Methods inherited from class Object

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

Constructor Details

SetOperationCornerCases

public SetOperationCornerCases()

No argument constructor.

Method Details

createCornerCaseId

public static int createCornerCaseId(long thetaLongA,
 int countA,
 boolean emptyA,
 long thetaLongB,
 int countB,
 boolean emptyB)

Creates the CornerCase ID

Parameters:

thetaLongA - the theta of A as a long

countA - the count of A

emptyA - true if A is empty

thetaLongB - the theta of B as a long

countB - the count of B

emptyB - true if B is empty

Returns:

the Corner Case ID

sketchStateId

public static int sketchStateId(boolean isEmpty,
 int numRetained,
 long thetaLong)

Returns the sketch state ID

Parameters:

isEmpty - true if empty

numRetained - the number of items retained

thetaLong - the value of theta as a long

Returns:

the sketch state ID