ModelBase Class Reference

datamodel-parts common part. this is inherited and contains common funcs More...

#include <datamodelbase.h>

Inheritance diagram for ModelBase:

Collaboration diagram for ModelBase:

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

Public Member Functions
	ModelBase (QString aDataTableName, unsigned aMaxRowsToKeep)
	~ModelBase ()
bool	setTimeLastReference (const Hash &aObjectFingerPrint, quint32 aTimeWhenLastReferenced)
unsigned	getMaxRowsToKeep ()
void	setMaxRowsToKeep (unsigned aRows)
void	truncateDataTableToMaxRows (void)
void	updateDbTableRowCount ()

Protected Attributes
QString	iDataTableName
unsigned	iMaxRowsToKeep
unsigned	iCurrentDbTableRowCount

Private Member Functions
virtual bool	deleteOldestDataRowInTable ()

Detailed Description

datamodel-parts common part. this is inherited and contains common funcs

There are several datamodel parts (profiles, files, ads etc.) that need some almost-equivalent functions ; this class is an attempt to provide those with minimal code duplication.

Constructor & Destructor Documentation

ModelBase()

ModelBase::ModelBase	(	QString	aDataTableName,
		unsigned	aMaxRowsToKeep
	)

Constructor.

Parameters

aDataTableName	specifies the database table where (most) of the data related to this model-part is stored in
aMaxRowsToKeep	initial value (from const.h) for max number of rows to keep in aDataTableName table ; class will check for modified value in settings table and if there is any, it will be used.

~ModelBase()

ModelBase::~ModelBase

(

)

Member Function Documentation

deleteOldestDataRowInTable()

virtual bool ModelBase::deleteOldestDataRowInTable ( )

privatevirtual

Reimplemented in ProfileModel.

error

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

signal

getMaxRowsToKeep()

unsigned ModelBase::getMaxRowsToKeep

(

)

method for controlling table truncation length

setMaxRowsToKeep()

void ModelBase::setMaxRowsToKeep

(

unsigned

aRows

)

method for controlling table truncation length variable

setTimeLastReference()

bool ModelBase::setTimeLastReference	(	const Hash &	aObjectFingerPrint,
		quint32	aTimeWhenLastReferenced
	)

this method sets time of last reference for an object. this is supposed to be called in situations where we know that a human requested the object to be displayed ; calls from UI layer are natural, also maybe situations where neighboring node sends a request that can only result from UI action.

Reason for the UI-requirement is this: we use the time of last reference to remove content from database, starting from data that has not been referenced for some time.

truncateDataTableToMaxRows()

void ModelBase::truncateDataTableToMaxRows

(

void

)

method that truncates the main data table size to iCurrentDbTableRowCount rows. This is to be periodically called, currently via timer in model.

updateDbTableRowCount()

void ModelBase::updateDbTableRowCount

(

)

method for getting initial value for iCurrentDbTableRowCount

Member Data Documentation

iCurrentDbTableRowCount

unsigned ModelBase::iCurrentDbTableRowCount

protected

Number of rows currently on table. This may get incremented by classes that inherint this class.

iDataTableName

QString ModelBase::iDataTableName

protected

name of primary table where data related to each model part is kept ; in runtime this gets values like "binaryfile" or "profle"

iMaxRowsToKeep

unsigned ModelBase::iMaxRowsToKeep

protected

max number of rows to keep in db table whose name is in iDataTableName

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

• datamodelbase.h