PersonDedupeDataSource::calculateEntityCount

public function calculateEntityCount(DuplicateCriterion $criterion, array $options = null)
{
	$count = $this->innerCalculateEntityCount($criterion, $options);

	$matches = $criterion->getMatches();
	$name = isset($matches['NAME']) ? $matches['NAME'] : '';
	$secondName = isset($matches['SECOND_NAME']) ? $matches['SECOND_NAME'] : '';
	$lastName = isset($matches['LAST_NAME']) ? $matches['LAST_NAME'] : '';

	if($secondName !== '' && $name !== '')
	{
		$count += $this->innerCalculateEntityCount(
			DuplicatePersonCriterion::createFromMatches(array('LAST_NAME' => $lastName, 'NAME' => $name)),
			$options
		);
	}
	if($name !== '')
	{
		$count += $this->innerCalculateEntityCount(
			DuplicatePersonCriterion::createFromMatches(array('LAST_NAME' => $lastName)),
			$options
		);
	}

	return $count;
}