Package org.apache.cassandra.utils.btree

Class UpdateFunction.Simple<V>

java.lang.Object

org.apache.cassandra.utils.btree.UpdateFunction.Simple<V>

All Implemented Interfaces:

UpdateFunction<V,V>

Enclosing interface:

UpdateFunction<K,V>

public static final class UpdateFunction.Simple<V>
extends Object
implements UpdateFunction<V,V>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.cassandra.utils.btree.UpdateFunction

UpdateFunction.Simple<V>

Field Summary

Fields inherited from interface org.apache.cassandra.utils.btree.UpdateFunction

noOp

Constructor Summary

Constructors

Constructor	Description
Simple(BiFunction<V,V,V> wrapped)

Method Summary

Modifier and Type	Method	Description
V	insert(V v)	Computes the value that should be inserted in the BTree.
V	merge(V replacing, V update)	Computes the result of merging the existing value with the one from the update.
static <V> UpdateFunction.Simple<V>	of(BiFunction<V,V,V> f)
void	onAllocatedOnHeap(long heapSize)

Methods inherited from class java.lang.Object

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

Constructor Details

Simple

public Simple(BiFunction<V,V,V> wrapped)

Method Details

insert

public V insert(V v)

Description copied from interface: UpdateFunction

Computes the value that should be inserted in the BTree.

Specified by:

insert in interface UpdateFunction<V,V>

Parameters:

v - the update value

Returns:

the value that should be inserted in the BTree

merge

public V merge(V replacing,
 V update)

Description copied from interface: UpdateFunction

Computes the result of merging the existing value with the one from the update.

Specified by:

merge in interface UpdateFunction<V,V>

Parameters:

replacing - the value in the original tree we have matched

update - the value in the updating collection that matched

Returns:

the value to insert into the new tree

onAllocatedOnHeap

public void onAllocatedOnHeap(long heapSize)

Specified by:

onAllocatedOnHeap in interface UpdateFunction<V,V>

Parameters:

heapSize - extra heap space allocated (over previous tree)

of

public static <V> UpdateFunction.Simple<V> of(BiFunction<V,V,V> f)