Inheritance diagram for question_variant_forced_choices_selection_strategy:

Public Member Functions
	__construct (array $forcedchoices, question_variant_selection_strategy $basestrategy)
	Constructor. More...

	choose_variant ($maxvariants, $seed)

Static Public Member Functions
static	prepare_forced_choices_array (array $variantsbyslot, question_usage_by_activity $quba)
	Helper method for preparing the $forcedchoices array. More...

Protected Attributes
question_variant_selection_strategy	$basestrategy
	strategy used to make the non-forced choices.

array	$forcedchoices
	seed => variant to select.

Detailed Description

For selected questions it wil return a specific variants. For the other slots it will use a fallback strategy.

Constructor & Destructor Documentation

question_variant_forced_choices_selection_strategy::__construct	(	array	$forcedchoices,
		question_variant_selection_strategy	$basestrategy
	)

Constructor.

Parameters

array	$forcedchoices	array seed => variant to select.
question_variant_selection_strategy	$basestrategy	strategy used to make the non-forced choices.

question_variant_forced_choices_selection_strategy::choose_variant	(	$maxvariants,
		$seed
	)

Parameters

int	$maxvariants	the num
string	$seed	data that can be used to controls how the variant is selected in a semi-random way.

Return values

int	the variant to use, a number betweeb 1 and $maxvariants inclusive.

static question_variant_forced_choices_selection_strategy::prepare_forced_choices_array	(	array	$variantsbyslot,
		question_usage_by_activity	$quba
	)

static

Helper method for preparing the $forcedchoices array.

Parameters

array	$variantsbyslot	slot number => variant to select.
question_usage_by_activity	$quba	the question usage we need a strategy for.

Exceptions

coding_exception when variant cannot be forced as doesn't work.

Return values

array that can be passed to the constructor as $forcedchoices.

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