Inheritance diagram for NullNode:

Public Member Functions
	getOID ()

	getDBID ()

Public Member Functions inherited from Node
	Node ($type, $oid=null)

	getNumChildren ($memOnly=true, $type=null)

	addChild (&$child, $addtype=ADDCHILD_BACK)

	updateParent (&$parent, $recursive=true)

	deleteChild ($childOID, $reallyDelete=false)

	loadChildren ($type, $buildDepth=BUILDDEPTH_SINGLE, $forceUpdate=false)

&	getFirstChild ($type, $values, $properties, $useRegExp=true)

	getChildren ()

	getChildrenEx ($oid, $type, $values, $properties, $useRegExp=true)

	sortChildren ($criteria, $recursive=false, $changeSortkey=false, $sortFunction='')

	sort (&$nodeList, $criteria, $recursive=false, $changeSortkey=false, $sortFunction='')

	filter (&$nodeList, $oid, $type, $values, $properties, $useRegExp=true)

	getNextSibling ()

	getPreviousSibling ()

	loadParents ($type, $forceUpdate=false)

	getNumParents ($memOnly=true, $type=null)

&	getParent ()

&	getFirstParent ($type, $values, $properties, $useRegExp=true)

&	getParents ()

	getParentsEx ($oid, $type, $values, $properties, $useRegExp=true)

	getDepth ()

	getPath ()

	acceptVisitor (&$visitor)

	setState ($state, $recursive=true)

	removeDuplicateOidsWithoutRole ($oids)

	getDisplayValue ($useDisplayType=false)

	getDisplayValues ($useDisplayType=false)

	toString ($verbose=false)

Public Member Functions inherited from PersistentObject
	PersistentObject ($type, $oid=null)

	getType ()

	setType ($type)

	getBaseType ()

	getOID ()

	getBaseOID ()

	setOID ($oid)

	getDBID ()

	setDBID ($id)

&	getMapper ()

&	getDataConverter ()

	save ()

	delete ($recursive=true)

	getState ()

	setState ($state, $recursive=true)

	setImmutable ()

	getLock ()

&	duplicate ()

	copyValues (&$object, $dataTypes=array(), $copyPkValues=true)

	copyValueIntern (&$node, $valueName, $dataType, &$targetNode, $dataTypes, $valuesToIgnore)

	clearValues ($dataTypes=array())

	clearValueIntern (&$node, $valueName, $dataType, $dataTypes)

	updateOID ()

	afterCreate ()

	beforeInsert ()

	afterInsert ()

	afterLoad ()

	beforeUpdate ()

	afterUpdate ()

	beforeDelete ()

	afterDelete ()

	hasValue ($name, $type=null)

	getValue ($name, $type=null)

	removeValue ($name, $type=null)

	getUnconvertedValue ($name, $type=null)

	getConvertedValue ($name, $type=null)

	getValueTypes ($name)

	validateValues ()

	validateValueIntern (&$node, $valueName, $dataType, &$errorMsg)

	validateValue ($name, $value, $type=null)

	validateValueAgainstRestrictions ($name, $value, $type=null)

	setValue ($name, $value, $type=null, $forceSet=false)

	getValueProperties ($name, $type=null)

	setValueProperties ($name, $properties, $type=null)

	getValueProperty ($name, $property, $type=null)

	setValueProperty ($name, $property, $value, $type=null)

	getValueNames ($type=null)

	getDataTypes ()

	getProperty ($name)

	setProperty ($name, $value)

	getPropertyNames ()

	addChangeListener (&$listener)

	removeChangeListener (&$listener)

	propagateValueChange ($name, $type, $oldValue, $newValue)

	propagatePropertyChange ($name, $oldValue, $newValue)

	propagateStateChange ($oldValue, $newValue)

	getObjectDisplayName ()

	getObjectDescription ()

	getDisplayValue ()

	getValueDisplayName ($name, $type=null)

	getValueDescription ($name, $type=null)

	toString ($verbose=false)

	isIndexInSearch ()

Public Member Functions inherited from Storable
	getClassDefinitionFiles ()

	loadFromSession ()

	saveToSession ()

Additional Inherited Members
Public Attributes inherited from Node
	$_children = array()

	$_parents = array()

	$_depth = -1

	$_path = ''

Public Attributes inherited from PersistentObject
	$_oid = null

	$_type = ''

	$_data = array()

	$_properties = array()

	$_state = STATE_CLEAN

	$_isImmutable = false

	$_changeListeners = array()

Detailed Description

NullNode is an implementation of the NullObject pattern, It inherits all functionality from Node (acts like a Node) and is only distinguishable from a Node instance by it's class or oid. If a Node's parent is a NullNode instance, than they should be separated in the data store (e.g. the foreign key should be null, if allowed by the database). NullNode child instances should be ignored. The object id is created using the following code: PersistenceFacade::composeOID(array('type' => $this->_type, 'id' => NULL))

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