it.uniroma2.sag.kelp.kernel.cache

Class KernelCache

java.lang.Object

it.uniroma2.sag.kelp.kernel.cache.KernelCache

Direct Known Subclasses:

DynamicIndexKernelCache, FixIndexKernelCache, FixSizeKernelCache, SimpleDynamicKernelCache, StripeKernelCache

public abstract class KernelCache
extends Object

Generic Cache for kernel computations

Author:

Simone Filice

Constructor Summary

Constructors

Constructor and Description
KernelCache()

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	flushCache() Empties the cache
long	getCacheHits()
long	getCacheMisses()
Float	getKernelValue(Example exA, Example exB) Retrieves in the cache the kernel operation between two examples
protected abstract Float	getStoredKernelValue(Example exA, Example exB) Retrieves in the cache the kernel operation between two examples
void	resetCacheStats() Sets cache hits and misses to 0
abstract void	setKernelValue(Example exA, Example exB, float value) Stores a kernel computation in cache

Methods inherited from class java.lang.Object

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

Constructor Detail

KernelCache

public KernelCache()

Method Detail

getKernelValue

public Float getKernelValue(Example exA,
                   Example exB)

Retrieves in the cache the kernel operation between two examples

Parameters:

exA - the first example

exB - the second example

Returns:

the kernel similarity, null if a cache miss occurs

getStoredKernelValue

protected abstract Float getStoredKernelValue(Example exA,
                         Example exB)

Retrieves in the cache the kernel operation between two examples

Parameters:

exA - the first example

exB - the second example

Returns:

the kernel similarity, null if a cache miss occurs

getCacheHits

public long getCacheHits()

Returns:

the number of cache hits

getCacheMisses

public long getCacheMisses()

Returns:

the number of cache misses

resetCacheStats

public void resetCacheStats()

Sets cache hits and misses to 0

setKernelValue

public abstract void setKernelValue(Example exA,
                  Example exB,
                  float value)

Stores a kernel computation in cache

Parameters:

exA - the first example

exB - the second example

value - the kernel value to be stored in cache

flushCache

public abstract void flushCache()

Empties the cache