it.uniroma2.sag.kelp.kernel.cache

Class FixIndexSquaredNormCache

java.lang.Object

it.uniroma2.sag.kelp.kernel.cache.FixIndexSquaredNormCache

All Implemented Interfaces:

SquaredNormCache

public class FixIndexSquaredNormCache
extends Object
implements SquaredNormCache

Constructor Summary

Constructors

Constructor and Description
FixIndexSquaredNormCache()
FixIndexSquaredNormCache(int cacheSize) Initializes a cache with a defined dimension for squared norms

Method Summary

Methods

Modifier and Type	Method and Description
void	flush() Empties the cache
int	getSize() Returns the size of the cache, i.e.
Float	getSquaredNorm(Example example) Returns a previously stored norm of a given example
void	setSize(int cacheSize) Sets the size of the cache, i.e.
void	setSquaredNormValue(Example example, float squaredNorm) Stores a squared norm in the cache

Methods inherited from class java.lang.Object

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

Constructor Detail

FixIndexSquaredNormCache

public FixIndexSquaredNormCache(int cacheSize)

Initializes a cache with a defined dimension for squared norms

Parameters:

cacheSize - the number of squared norms the cache can simultaneously store

FixIndexSquaredNormCache

public FixIndexSquaredNormCache()

Method Detail

getSize

public int getSize()

Returns the size of the cache, i.e. the number of norms that can be simultaneously stored

Returns:

the size of the cache

setSize

public void setSize(int cacheSize)

Sets the size of the cache, i.e. the number of norms that can be simultaneously stored

Parameters:

size - the size to set

NOTE: when this methods is invoked, the cache is initialized from scratch, so all the currently stored norms will be lost

getSquaredNorm

public Float getSquaredNorm(Example example)

Description copied from interface: SquaredNormCache

Returns a previously stored norm of a given example

Specified by:

getSquaredNorm in interface SquaredNormCache

Parameters:

example - the instance whose squared norm is required

Returns:

the squared norm or null if a cache miss occurs

setSquaredNormValue

public void setSquaredNormValue(Example example,
                       float squaredNorm)

Description copied from interface: SquaredNormCache

Stores a squared norm in the cache

Specified by:

setSquaredNormValue in interface SquaredNormCache

Parameters:

example - the example whose quadratic norm must be stored

squaredNorm - the squared norm to be stored

flush

public void flush()

Description copied from interface: SquaredNormCache

Empties the cache

Specified by:

flush in interface SquaredNormCache