TreeAbstract Class Reference

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Public Member Functions
	TreeAbstract ()
	init ()
	storeItem ($item_id, $parent_id, $name, $priority)
	buildIndex ($item_id=false)
	getKids ($item_id)
	getNumKids ($item_id)
	getKidsKids ($item_id, $in_recursion=false)
	getNumKidsKids ($item_id, $in_recursion=false)
	isLastKid ($item_id)
	isFirstKid ($item_id)
	isChildOf ($ancestor_id, $item_id)
	hasKids ($item_id)
	getItemPath ($item_id)
	getParents ($item_id)
	getShortPath ($item_id, $depth=false, $delimeter=">")
	getMaxPriority ($parent_id)
	getNumEntries ($item_id, $num_entries_from_kids=false)
	getNumEntriesKids ($item_id, $in_recursion=false)
	getValue ($item_id, $field)

Static Public Member Functions
	GetInstance ($class_name, $args=null, $invalidate_cache=false)

Data Fields
	$root_name
	$view
	$tree_data = array()
	$tree_childs = array()
	$tree_num_childs = array()
	$index_offset = 0

Member Function Documentation

buildIndex

(

$item_id = false

)

build an index for sorting purpose

build an index for sorting purpose

public

Parameters

string

$item_id

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GetInstance (   $class_name,   $args = null,   $invalidate_cache = false  )

static

static method used to ensure that only one instance exists

use this method if you need a reference to the tree object
usage:

$my_tree = StudipRangeTree::GetInstance("name_of_tree_class")

public

Parameters

string	$class_name	the name of the used tree_class
mixed	$args	argumentlist passed to the constructor in the tree_class (if needed)

Returns

mixed always an object, type is one of AbstractTree s childclasses

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getItemPath

(

$item_id

)

Returns tree path

returns a string with the item and all parents separated with a slash public

Parameters

string

$item_id

Returns

string

getKids

(

$item_id

)

returns all direct kids

public

Parameters

string

$item_id

Returns

array

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getKidsKids	(		$item_id,
			$in_recursion = false
	)

returns all direct kids and kids of kids and so on...

public

Parameters

string	$item_id
bool	$in_recursion	only used in recursion

Returns

array

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getMaxPriority

(

$parent_id

)

Returns the maximum priority value from a parents child

public

Parameters

string

$parent_id

Returns

int

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getNumEntries	(		$item_id,
			$num_entries_from_kids = false
	)

Reimplemented in StudipRangeTree, and StudipSemTree.

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getNumEntriesKids	(		$item_id,
			$in_recursion = false
	)

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getNumKids

(

$item_id

)

returns the number of all direct kids

public

Parameters

string	$item_id
bool	$in_recursion

Returns

int

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getNumKidsKids	(		$item_id,
			$in_recursion = false
	)

returns the number of all kids and kidskids...

public

Parameters

string	$item_id
bool	$in_recursion

Returns

int

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getParents

(

$item_id

)

Returns tree path as array of item_id s

returns an array containing all parents of given item public

Parameters

string

$item_id

Returns

array

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getShortPath	(		$item_id,
			$depth = false,
			$delimeter = ">"
	)

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getValue	(		$item_id,
			$field
	)

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hasKids

(

$item_id

)

checks if item has one or more kids

public

Parameters

string

$item_id

Returns

boolean

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init

(

)

initializes the tree

stores all tree items in array $tree_data must be overriden public

Reimplemented in EvaluationTree, StudipSemTree, StudipDocumentTree, StudipLitList, StudipRangeTree, StudipStmInstancesTree, and ResourcesExternTree.

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isChildOf	(		$ancestor_id,
			$item_id
	)

checks if given item is a kid or kidkid...of given ancestor

checks if given item is a kid or kidkid...of given ancestor public

Parameters

string	$ancestor_id
string	$item_id

Returns

boolean

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isFirstKid

(

$item_id

)

checks if item is the first kid

public

Parameters

string

$item_id

Returns

boolean

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isLastKid

(

$item_id

)

checks if item is the last kid

public

Parameters

string

$item_id

Returns

boolean

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storeItem	(		$item_id,
			$parent_id,
			$name,
			$priority
	)

store one item in tree_data array

store one item in tree_data array public

Parameters

string	$item_id
string	$parent_id
string	$name
integer	$priority

Reimplemented in StudipStmInstancesTree.

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TreeAbstract

(

)

constructor

do not use directly, call &GetInstance() private

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Field Documentation

$index_offset = 0

string $root_name

the name of the root element

private

array $tree_childs = array()

array containing the direct childs of all items

assoc. array, key is one from $tree_data, value is numeric array with keys from childs private

array $tree_data = array()

array containing all tree items

associative array, key is an unique identifier (eg primary key from DB table) value is another assoc. array containing the other fieldname/fieldvalue pairs these fieldnames must be used : parent_id, name, priority public

array $tree_num_childs = array()

array containing the number of direct childs of all items

assoc. array, key is one from $tree_data private

object DbView $view

object to handle database queries

private

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

• lib/classes/TreeAbstract.class.php