org.wso2.extension.siddhi.execution.approximate.distinctcount

Class CountList

java.lang.Object

org.wso2.extension.siddhi.execution.approximate.distinctcount.CountList

All Implemented Interfaces:

Serializable

public class CountList
extends Object
implements Serializable

A data structure to keep track of maximum zero counts for a bucket to restore the previous maximums when the old counts are removed.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CountList()

Method Summary

Modifier and Type	Method and Description
boolean	add(int newValue) Add new value to the counts if the previous values are greater than or equal to the new value.
int	remove(int value) Remove the given value from the counts

Methods inherited from class java.lang.Object

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

Constructor Detail

CountList

public CountList()

Method Detail

add

public boolean add(int newValue)

Add new value to the counts if the previous values are greater than or equal to the new value.

Parameters:

newValue - is the new value to be inserted

Returns:

true if the newValue is added, false if the newValue is not added

remove

public int remove(int value)

Remove the given value from the counts

Parameters:

value - is the value to be removed

Returns:

the next count value if the removed value was the first value in the list, -1 if the removed value does not affect the counts, 0 if the list is empty