Package edu.berkeley.nlp.lm.cache

Class ArrayEncodedDirectMappedLmCache

java.lang.Object

edu.berkeley.nlp.lm.cache.ArrayEncodedDirectMappedLmCache

All Implemented Interfaces:

ArrayEncodedLmCache, java.io.Serializable

public final class ArrayEncodedDirectMappedLmCache
extends java.lang.Object
implements ArrayEncodedLmCache

A direct-mapped cache. This cache does not perform any collision resolution, but rather retains only the most recent key which gets hashed to a particular bucket.

Author:

adampauls

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
ArrayEncodedDirectMappedLmCache(int cacheBits, int maxNgramOrder, boolean threadSafe)

Method Summary

Modifier and Type	Method	Description
int	capacity()	How n-grams can be cached (at most).
void	clear()
float	getCached(int[] ngram, int startPos, int endPos, int hash)	Should return Float.NaN if the requested n-gram is not in the cache
void	putCached(int[] ngram, int startPos, int endPos, float f, int hash)

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayEncodedDirectMappedLmCache

public ArrayEncodedDirectMappedLmCache(int cacheBits,
                                       int maxNgramOrder,
                                       boolean threadSafe)

Method Detail

getCached

public float getCached(int[] ngram,
                       int startPos,
                       int endPos,
                       int hash)

Description copied from interface: ArrayEncodedLmCache

Should return Float.NaN if the requested n-gram is not in the cache

Specified by:

getCached in interface ArrayEncodedLmCache

Returns:

clear

public void clear()

Specified by:

clear in interface ArrayEncodedLmCache

putCached

public void putCached(int[] ngram,
                      int startPos,
                      int endPos,
                      float f,
                      int hash)

Specified by:

putCached in interface ArrayEncodedLmCache

capacity

public int capacity()

Description copied from interface: ArrayEncodedLmCache

How n-grams can be cached (at most).

Specified by:

capacity in interface ArrayEncodedLmCache

Returns: