Package org.bouncycastle.tsp.ers

Class ERSCachingData

java.lang.Object

org.bouncycastle.tsp.ers.ERSCachingData

All Implemented Interfaces:

ERSData

Direct Known Subclasses:

ERSByteData, ERSDataGroup, ERSFileData, ERSInputStreamData

public abstract class ERSCachingData
extends Object
implements ERSData

An ERSData object that caches hash calculations.

Constructor Summary

Constructors

Constructor	Description
ERSCachingData()

Method Summary

Modifier and Type	Method	Description
protected abstract byte[]	calculateHash(DigestCalculator digestCalculator, byte[] previousChainHash)
byte[]	getHash(DigestCalculator digestCalculator, byte[] previousChainHash)	Generates a hash for the whole DataGroup.

Methods inherited from class java.lang.Object

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

Constructor Details

ERSCachingData

public ERSCachingData()

Method Details

getHash

public byte[] getHash(DigestCalculator digestCalculator,
 byte[] previousChainHash)

Generates a hash for the whole DataGroup.

Specified by:

getHash in interface ERSData

Parameters:

digestCalculator - the DigestCalculator to use for computing the hash

previousChainHash - hash from an earlier chain if it needs to be included.

Returns:

a hash that is representative of the whole DataGroup

calculateHash

protected abstract byte[] calculateHash(DigestCalculator digestCalculator,
 byte[] previousChainHash)