Class DefaultMemoizingFunction<K,V>

java.lang.Object

io.fluxzero.common.DefaultMemoizingFunction<K,V>

Type Parameters:

K - the type of input keys

V - the type of values produced by applying the delegate function

All Implemented Interfaces:

MemoizingFunction<K,V>, Function<K,V>

public class DefaultMemoizingFunction<K,V>
extends Object
implements MemoizingFunction<K,V>

A default implementation of the MemoizingFunction interface that provides caching functionality for computed function results. The results are cached by key, and can be optionally configured with a time-based expiration policy.

This class uses a ConcurrentHashMap internally for thread-safe storage of cached entries.

Constructor Summary

Constructors

Constructor	Description
DefaultMemoizingFunction(Function<K,V> delegate)

Method Summary

Modifier and Type	Method	Description
V	apply(K key)
void	clear()	Removes all cached values from this function.
void	forEach(Consumer<? super V> consumer)	Applies the given consumer to all currently cached values.
boolean	isCached(K key)	Checks if the given key has a cached value.
V	remove(K key)	Removes and returns the cached result for the given key, if present.

Methods inherited from class Object

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

Methods inherited from interface Function

andThen

Methods inherited from interface MemoizingFunction

compose

Constructor Details

DefaultMemoizingFunction

public DefaultMemoizingFunction(Function<K,V> delegate)

Method Details

apply

public V apply(K key)

Specified by:

apply in interface Function<K,V>

clear

public void clear()

Description copied from interface: MemoizingFunction

Removes all cached values from this function.

Specified by:

clear in interface MemoizingFunction<K,V>

remove

public V remove(K key)

Description copied from interface: MemoizingFunction

Removes and returns the cached result for the given key, if present.

Specified by:

remove in interface MemoizingFunction<K,V>

Parameters:

key - the key whose cached result should be removed

Returns:

the previously cached value, or null if not present

isCached

public boolean isCached(K key)

Description copied from interface: MemoizingFunction

Checks if the given key has a cached value.

Specified by:

isCached in interface MemoizingFunction<K,V>

Parameters:

key - the key to test

Returns:

true if the value is cached, otherwise false

forEach

public void forEach(Consumer<? super V> consumer)

Description copied from interface: MemoizingFunction

Applies the given consumer to all currently cached values.

Specified by:

forEach in interface MemoizingFunction<K,V>

Parameters:

consumer - a consumer to operate on cached values