org.bouncycastle.util

Interface Memoable

All Known Implementing Classes:

GeneralDigest, LongDigest, MD5Digest, SHA1Digest, SHA224Digest, SHA256Digest, SHA384Digest, SHA512Digest, SHA512tDigest

public interface Memoable

Interface for Memoable objects. Memoable objects allow the taking of a snapshot of their internal state via the copy() method and then reseting the object back to that state later using the reset() method.

Method Summary

Methods

Modifier and Type	Method and Description
Memoable	copy() Produce a copy of this object with its configuration and in its current state.
void	reset(Memoable other) Restore a copied object state into this object.

Method Detail

copy

Memoable copy()

Produce a copy of this object with its configuration and in its current state.

The returned object may be used simply to store the state, or may be used as a similar object starting from the copied state.

reset

void reset(Memoable other)

Restore a copied object state into this object.

Implementations of this method should try to avoid or minimise memory allocation to perform the reset.

Parameters:

other - an object originally copied from an object of the same type as this instance.

Throws:

ClassCastException - if the provided object is not of the correct type.

MemoableResetException - if the other parameter is in some other way invalid.