Package com.exonum.binding.common.proofs.list

Class CheckedListProofImpl<E>

java.lang.Object

com.exonum.binding.common.proofs.list.CheckedListProofImpl<E>

All Implemented Interfaces:

CheckedProof, CheckedListProof<E>

public class CheckedListProofImpl<E>
extends Object
implements CheckedListProof<E>

A checked list proof includes list proof verification results.

If it is correct you may access:

• a calculated index hash of corresponding collection
• proof elements

If the proof is the proof of absence, then empty collection of elements is returned.

If the proof is not valid, you may get the verification status using getProofStatus() with description of why the proof is not valid.

Constructor Summary

Constructors

Constructor	Description
CheckedListProofImpl(long size, HashCode calculatedIndexHash, NavigableMap<Long,E> elements, ListProofStatus proofStatus)	Creates checked list proof.

Method Summary

Modifier and Type	Method	Description
NavigableMap<Long,E>	getElements()	Get all list proof elements.
HashCode	getIndexHash()	Returns the calculated index hash of the proof.
ListProofStatus	getProofStatus()	Returns the status of this proof: whether it is structurally valid.
boolean	isValid()	Returns true if proof status is valid, false otherwise.
long	size()	Returns the size of the list: the total number of elements in it.

Methods inherited from class java.lang.Object

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

Constructor Details

CheckedListProofImpl

public CheckedListProofImpl(long size, HashCode calculatedIndexHash, NavigableMap<Long,E> elements, ListProofStatus proofStatus)

Creates checked list proof.

Parameters:

calculatedIndexHash - calculated index hash of the proof

elements - proof elements collection (empty in case of a proof of absence)

proofStatus - a status of proof verification

Method Details

size

public long size()

Description copied from interface: CheckedListProof

Returns the size of the list: the total number of elements in it.

Specified by:

size in interface CheckedListProof<E>

getElements

public NavigableMap<Long,E> getElements()

Description copied from interface: CheckedListProof

Get all list proof elements. There might be several consecutive ranges.

Specified by:

getElements in interface CheckedListProof<E>

Returns:

list proof elements. Empty if the proof is a proof of absence

getIndexHash

public HashCode getIndexHash()

Description copied from interface: CheckedProof

Returns the calculated index hash of the proof. Must be equal to the index hash of the collection, providing this proof.

Specified by:

getIndexHash in interface CheckedProof

getProofStatus

public ListProofStatus getProofStatus()

Description copied from interface: CheckedListProof

Returns the status of this proof: whether it is structurally valid.

Specified by:

getProofStatus in interface CheckedListProof<E>

Specified by:

getProofStatus in interface CheckedProof

isValid

public boolean isValid()

Description copied from interface: CheckedProof

Returns true if proof status is valid, false otherwise. Details about the proof verification status could be obtained via CheckedProof.getProofStatus().

Specified by:

isValid in interface CheckedProof