org.apfloat.internal

Class AbstractNTTBuilder

java.lang.Object

org.apfloat.internal.AbstractNTTBuilder

All Implemented Interfaces:

NTTBuilder

Direct Known Subclasses:

DoubleNTTBuilder, FloatNTTBuilder, IntNTTBuilder, LongNTTBuilder

public abstract class AbstractNTTBuilder
extends Object
implements NTTBuilder

Abstract base class for creating Number Theoretic Transforms suitable for the specified length, based on available memory configured in the ApfloatContext.

Since:

1.7.0

Version:

1.7.0

Author:

Mikko Tommila

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractNTTBuilder() Subclass constructor.

Method Summary

Modifier and Type	Method and Description
protected abstract NTTStrategy	createFactor3NTTStrategy(NTTStrategy nttStrategy) Create a factor-3 NTT strategy on top of another NTT strategy.
NTTStrategy	createNTT(long size) Creates a Number Theoretic Transform of suitable type for the specified length.
protected abstract NTTStrategy	createSimpleFNTStrategy() Create a simple NTT strategy.
protected abstract NTTStrategy	createSixStepFNTStrategy() Create a six-step NTT strategy.
protected abstract NTTStrategy	createTwoPassFNTStrategy() Create a two-pass NTT strategy.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apfloat.spi.NTTBuilder

createFactor3NTTSteps, createNTTConvolutionSteps, createNTTSteps

Constructor Detail

AbstractNTTBuilder

protected AbstractNTTBuilder()

Subclass constructor.

Method Detail

createNTT

public NTTStrategy createNTT(long size)

Description copied from interface: NTTBuilder

Creates a Number Theoretic Transform of suitable type for the specified length.

Specified by:

createNTT in interface NTTBuilder

Parameters:

size - The transform length that will be used.

Returns:

A suitable NTT object for performing the transform.

createSimpleFNTStrategy

protected abstract NTTStrategy createSimpleFNTStrategy()

Create a simple NTT strategy.

Returns:

A new simple NTT strategy.

createSixStepFNTStrategy

protected abstract NTTStrategy createSixStepFNTStrategy()

Create a six-step NTT strategy.

Returns:

A new six-step NTT strategy.

createTwoPassFNTStrategy

protected abstract NTTStrategy createTwoPassFNTStrategy()

Create a two-pass NTT strategy.

Returns:

A new two-pass NTT strategy.

createFactor3NTTStrategy

protected abstract NTTStrategy createFactor3NTTStrategy(NTTStrategy nttStrategy)

Create a factor-3 NTT strategy on top of another NTT strategy.

Parameters:

nttStrategy - The underlying factor-2 NTT strategy.

Returns:

A new factor-3 NTT strategy.