Package com.scurrilous.circe.checksum

Class Crc32cSse42Provider

java.lang.Object

com.scurrilous.circe.impl.AbstractHashProvider<HashParameters>

com.scurrilous.circe.checksum.Crc32cSse42Provider

All Implemented Interfaces:

HashProvider

public final class Crc32cSse42Provider
extends AbstractHashProvider<HashParameters>

Constructor Summary

Constructors

Constructor	Description
Crc32cSse42Provider()

Method Summary

Modifier and Type	Method	Description
protected StatelessHash	createCacheable(HashParameters params, java.util.EnumSet<HashSupport> required)	Called by AbstractHashProvider.getCacheable(P, java.util.EnumSet<com.scurrilous.circe.HashSupport>) to create new cacheable stateless hash functions.
protected Hash	get(HashParameters params, java.util.EnumSet<HashSupport> required)	Requests a hash function using the given parameters and support flags.
protected java.util.EnumSet<HashSupport>	querySupportTyped(HashParameters params)	Implemented by subclasses to provide information about the available implementations corresponding to the given hash algorithm parameters.

Methods inherited from class com.scurrilous.circe.impl.AbstractHashProvider

createStateful, getCacheable, getIncrementalInt, getIncrementalLong, getStatelessInt, getStatelessLong, querySupport

Methods inherited from class java.lang.Object

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

Constructor Detail

Crc32cSse42Provider

public Crc32cSse42Provider()

Method Detail

querySupportTyped

protected java.util.EnumSet<HashSupport> querySupportTyped(HashParameters params)

Description copied from class: AbstractHashProvider

Implemented by subclasses to provide information about the available implementations corresponding to the given hash algorithm parameters. Called by AbstractHashProvider.querySupport(com.scurrilous.circe.HashParameters) if the hash parameters match the base type supported by this provider.

Specified by:

querySupportTyped in class AbstractHashProvider<HashParameters>

Parameters:

params - the hash algorithm parameters

Returns:

a set of flags indicating the level of support

get

protected Hash get(HashParameters params,
                   java.util.EnumSet<HashSupport> required)

Description copied from class: AbstractHashProvider

Requests a hash function using the given parameters and support flags. This method is only responsible for checking support flags returned by AbstractHashProvider.querySupportTyped(P).

To support caching of stateless hash functions, call AbstractHashProvider.getCacheable(P, java.util.EnumSet<com.scurrilous.circe.HashSupport>) from this method and implement AbstractHashProvider.createCacheable(P, java.util.EnumSet<com.scurrilous.circe.HashSupport>).

Specified by:

get in class AbstractHashProvider<HashParameters>

Parameters:

params - the hash algorithm parameters

required - the required hash support flags

Returns:

a hash function

createCacheable

protected StatelessHash createCacheable(HashParameters params,
                                        java.util.EnumSet<HashSupport> required)

Description copied from class: AbstractHashProvider

Called by AbstractHashProvider.getCacheable(P, java.util.EnumSet<com.scurrilous.circe.HashSupport>) to create new cacheable stateless hash functions. The default implementation simply throws UnsupportedOperationException.

Overrides:

createCacheable in class AbstractHashProvider<HashParameters>

Parameters:

params - the hash algorithm parameters

required - the required hash support flags

Returns:

a stateless hash function