net.ontopia.utils

Class CachedIndex<K,E>

java.lang.Object

net.ontopia.utils.CachedIndex<K,E>

All Implemented Interfaces:

LookupIndexIF<K,E>

Deprecated.

@Deprecated
public class CachedIndex<K,E>
extends Object
implements LookupIndexIF<K,E>

INTERNAL: A LookupIndexIF which uses another, slower, LookupIndexIF as a fallback and caches the values attached to the most commonly requested keys using an LRU strategy. There is a maximum number of keys that can be stored in the index and the index will automatically prune the less-used keys to avoid the index growing above this maximum size.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	CachedIndex.Entry<A,B> Deprecated.

Constructor Summary

Constructors

Constructor and Description
CachedIndex(LookupIndexIF<K,E> fallback) Deprecated. Creates an index with the given fallback and default settings.
CachedIndex(LookupIndexIF<K,E> fallback, boolean nulls) Deprecated. Creates an index with the given fallback, default settings and the specified nulls setting.
CachedIndex(LookupIndexIF<K,E> fallback, int max, int size, boolean nulls) Deprecated. Creates an index with the given fallback and settings.

Method Summary

Modifier and Type	Method and Description
E	get(K key) Deprecated.
int	getKeyNumber() Deprecated.
protected void	prune() Deprecated. Removes some of the keys in the cache, keeping only the most frequently requested keys.
E	put(K key, E value) Deprecated.
E	remove(K key) Deprecated.
void	writeReport() Deprecated.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedIndex

public CachedIndex(LookupIndexIF<K,E> fallback)

Deprecated.

Creates an index with the given fallback and default settings.

CachedIndex

public CachedIndex(LookupIndexIF<K,E> fallback,
                   boolean nulls)

Deprecated.

Creates an index with the given fallback, default settings and the specified nulls setting.

CachedIndex

public CachedIndex(LookupIndexIF<K,E> fallback,
                   int max,
                   int size,
                   boolean nulls)

Deprecated.

Creates an index with the given fallback and settings.

Parameters:

fallback - The index to ask if the value is not found in the cache.

max - The max number of keys to store in the cache (default: 10000).

size - The initial size of the cache.

nulls - Store null values retrieved from fallback.

Method Detail

get

public E get(K key)

Deprecated.

Specified by:

get in interface LookupIndexIF<K,E>

put

public E put(K key,
             E value)

Deprecated.

Specified by:

put in interface LookupIndexIF<K,E>

remove

public E remove(K key)

Deprecated.

Specified by:

remove in interface LookupIndexIF<K,E>

getKeyNumber

public int getKeyNumber()

Deprecated.

writeReport

public void writeReport()

Deprecated.

prune

protected void prune()

Deprecated.

Removes some of the keys in the cache, keeping only the most frequently requested keys.