qtype_calculated_dataset_loader Class Reference

This class is responsible for loading the dataset that a question needs from the database. More...

Inheritance diagram for qtype_calculated_dataset_loader:

Public Member Functions
	__construct ($questionid)
	Constructor.
	datasets_are_synchronised ($category)
	get_number_of_items ()
	Get the number of items (different values) in each dataset used by this question.
	get_values ($itemnumber)
	Load a particular set of values for each dataset used by this question.

Protected Member Functions
	load_values ($itemnumber)
	Actually query the database for the values.

Protected Attributes
int	$itemsavailable = null
	the id of the question we are helping.
int	$questionid
	the id of the question we are helping.

Detailed Description

This class is responsible for loading the dataset that a question needs from the database.

Copyright

2011 The Open University

License

http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

Constructor & Destructor Documentation

__construct()

qtype_calculated_dataset_loader::__construct

(

$questionid

)

Constructor.

Parameters

int

$questionid

the question to load datasets for.

Member Function Documentation

get_number_of_items()

qtype_calculated_dataset_loader::get_number_of_items

(

)

Get the number of items (different values) in each dataset used by this question.

This is the minimum number of items in any dataset used by this question.

Return values

int	the number of items available.

Reimplemented in qtype_calculated_test_dataset_loader.

get_values()

qtype_calculated_dataset_loader::get_values

(

$itemnumber

)

Load a particular set of values for each dataset used by this question.

Parameters

int

$itemnumber

which set of values to load. 0 < $itemnumber <= get_number_of_items().

Return values

array

name => value.

load_values()

qtype_calculated_dataset_loader::load_values ( $itemnumber )

protected

Actually query the database for the values.

Parameters

int

$itemnumber

which set of values to load.

Return values

array

name => value;

Reimplemented in qtype_calculated_test_dataset_loader.

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

• question/type/calculated/question.php