TrustTreeModel Class Reference

This is is part of datamodel for trust tree related operation. More...

#include <trusttreemodel.h>

Inheritance diagram for TrustTreeModel:

Collaboration diagram for TrustTreeModel:

Classes
struct	TrustTreeItemStruct

Public Slots
void	contentReceived (const Hash &aHashOfContent, const ProtocolItemType aTypeOfReceivdContent)

Signals
void	error (MController::CAErrorSituation aError, const QString &aExplanation)

Public Member Functions
	TrustTreeModel (MController *aMController, const MModelProtocolInterface &aModel)
	~TrustTreeModel ()
void	offerTrustList (const Hash &aTrustListOwnerProfile, const QString &aOwnerProfileDisplayName, const QList< Hash > &aList)
bool	isProfileTrusted (const Hash &aProfile, QString *aDisplayNameOfTrustingProfile, Hash *aFpOfTrustingProfile) const
void	initModel (const QVariant &aPreviousSettings)
QVariant	trustTreeSettings () const
void	clear (void)

Private Types
typedef struct TrustTreeModel::TrustTreeItemStruct	TrustTreeItem

Private Member Functions
void	recalculateTrust ()
void	setProfileTrustedInList (const Hash &aTrustedProfile, const Hash &aTrustingProfile, int aLevel)

Private Attributes
MController &	iController
const MModelProtocolInterface &	iModel
QMap< Hash, TrustTreeItem > *	iTrustTree
unsigned	iLastUpdateTime

Detailed Description

This is is part of datamodel for trust tree related operation.

Trust list of part of operator profile. Simple as that. This class contains algorithms manipulating a tree constructed from lists of operators where operators expores (dis)trust of each others in complex web of nodes and vertices. Main goal is fast query about trustworthiness of given operator profile.

Classified ads treats trust as boolean ; operator either is trusted or not. There is no distinction between recognizing the operators identity and assigning trust to her - if operator is trusted it must mean both at the same time: trusted operator is identified at least somehow and in addition is recognized as trustworthy animal, person or bot.

Output is also boolean. There are algorithms for producing floating point numbers for this purpose .. say, half of your trusted friends give some unknown operator "true" for trust, the other half does not (either recognize or trust) so you could decide that his operator enjoys some 50% trustworthiness - this is not done. Motivation is simplicity both in concept and algorithms, the floating point methods tend to be computationally rather expensive.

Member Typedef Documentation

TrustTreeItem

typedef struct TrustTreeModel::TrustTreeItemStruct TrustTreeModel::TrustTreeItem

private

internal trust list item

Constructor & Destructor Documentation

TrustTreeModel()

TrustTreeModel::TrustTreeModel	(	MController *	aMController,
		const MModelProtocolInterface &	aModel
	)

~TrustTreeModel()

TrustTreeModel::~TrustTreeModel

(

)

Member Function Documentation

clear()

void TrustTreeModel::clear

(

void

)

method for emptying model contents in event of profile change

contentReceived

void TrustTreeModel::contentReceived ( const Hash &  aHashOfContent, const ProtocolItemType  aTypeOfReceivdContent  )

slot

activated when new profile is received

error

void TrustTreeModel::error ( MController::CAErrorSituation  aError, const QString &  aExplanation  )

signal

initModel()

void TrustTreeModel::initModel

(

const QVariant &

aPreviousSettings

)

method for initializing the model when profile changes

Parameters

aPreviousSettings

settings previously obtained using trustTreeSettings method

isProfileTrusted()

bool TrustTreeModel::isProfileTrusted	(	const Hash &	aProfile,
		QString *	aDisplayNameOfTrustingProfile,
		Hash *	aFpOfTrustingProfile
	)		const

Method for making a query about a profile.

Parameters

aProfile	fingerprint of the profile queried
aDisplayNameOfTrustingProfile	pointer to string that, if non-null, in case of this method returns true, will have its value set to display-name of some profile that trusts aProfile
aFpOfTrustingProfile	behaves the same way as aDisplayNameOfTrustingProfile but instead of display-name carries a fingerprint

Returns

true if profile is trusted.

offerTrustList()

void TrustTreeModel::offerTrustList	(	const Hash &	aTrustListOwnerProfile,
		const QString &	aOwnerProfileDisplayName,
		const QList< Hash > &	aList
	)

method for injecting a trust list into model. This is called when there is suspicion that trust list of a profile may have been changed and this causes re-calculation of the trust tree

Parameters

aTrustListOwnerProfile	fingerprint of profile whose list is about to get processed
aOwnerProfileDisplayName	human-readable name for the profile
aList	is the list. This is a list of fingerprints of other profiles that aTrustListOwnerProfile indicates to be trustworthy.

recalculateTrust()

void TrustTreeModel::recalculateTrust ( )

private

method that takes contents of iTrustTree and if there is any additions etc. takes them into account

setProfileTrustedInList()

void TrustTreeModel::setProfileTrustedInList ( const Hash &  aTrustedProfile, const Hash &  aTrustingProfile, int  aLevel  )

private

sets profile trusted in trust list. called from recalculateTrust

trustTreeSettings()

QVariant TrustTreeModel::trustTreeSettings

(

)

const

Method that exports model state as QVariant.

Member Data Documentation

iController

MController& TrustTreeModel::iController

private

iLastUpdateTime

unsigned TrustTreeModel::iLastUpdateTime

private

iModel

const MModelProtocolInterface& TrustTreeModel::iModel

private

iTrustTree

QMap<Hash, TrustTreeItem>* TrustTreeModel::iTrustTree

private

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The documentation for this class was generated from the following file:

• trusttreemodel.h