Package org.apache.commons.collections4.bloomfilter

Class LayerManager.Cleanup

java.lang.Object

org.apache.commons.collections4.bloomfilter.LayerManager.Cleanup

Enclosing class:

LayerManager

public static final class LayerManager.Cleanup
extends Object

Static methods to create a Consumer of a LinkedList of BloomFilter perform tests on whether to reduce the collection of Bloom filters.

Method Summary

Modifier and Type	Method	Description
static Consumer<LinkedList<BloomFilter>>	noCleanup()	A Cleanup that never removes anything.
static Consumer<LinkedList<BloomFilter>>	onMaxSize(int maxSize)	Removes the earliest filters in the list when the the number of filters exceeds maxSize.
static Consumer<LinkedList<BloomFilter>>	removeEmptyTarget()	Removes the last added target if it is empty.

Methods inherited from class java.lang.Object

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

Method Details

noCleanup

public static Consumer<LinkedList<BloomFilter>> noCleanup()

A Cleanup that never removes anything.

Returns:

A Consumer suitable for the LayerManager cleanup parameter.

onMaxSize

public static Consumer<LinkedList<BloomFilter>> onMaxSize(int maxSize)

Removes the earliest filters in the list when the the number of filters exceeds maxSize.

Parameters:

maxSize - the maximum number of filters for the list. Must be greater than 0

Returns:

A Consumer suitable for the LayerManager cleanup parameter.

Throws:

IllegalArgumentException - if maxSize <= 0.

removeEmptyTarget

public static Consumer<LinkedList<BloomFilter>> removeEmptyTarget()

Removes the last added target if it is empty. Useful as the first in a chain of cleanup consumers. (e.g. Cleanup.removeEmptyTarget.andThen( otherConsumer ))

Returns:

A Consumer suitable for the LayerManager cleanup parameter.