This class describes the services we need to implement Delta and Undo/Redo services. More...

#include <TDF_AttributeDelta.hxx>

Inheritance diagram for TDF_AttributeDelta:

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Public Member Functions
virtual void	Apply ()=0
	Applies the delta to the attribute.

TDF_Label	Label () const
	Returns the label concerned by <me>.

occ::handle< TDF_Attribute >	Attribute () const
	Returns the reference attribute.

Standard_GUID	ID () const
	Returns the ID of the attribute concerned by <me>.

virtual Standard_OStream &	Dump (Standard_OStream &OS) const
	Dumps the contents.

Standard_OStream &	operator<< (Standard_OStream &OS) const

virtual void	DumpJson (Standard_OStream &theOStream, int theDepth=-1) const
	Dumps the content of me into the stream.

Public Member Functions inherited from Standard_Transient
	Standard_Transient ()
	Empty constructor.

	Standard_Transient (const Standard_Transient &)
	Copy constructor – does nothing.

Standard_Transient &	operator= (const Standard_Transient &)
	Assignment operator, needed to avoid copying reference counter.

virtual	~Standard_Transient ()=default
	Destructor must be virtual.

virtual const opencascade::handle< Standard_Type > &	DynamicType () const
	Returns a type descriptor about this object.

bool	IsInstance (const opencascade::handle< Standard_Type > &theType) const
	Returns a true value if this is an instance of Type.

bool	IsInstance (const char *const theTypeName) const
	Returns a true value if this is an instance of TypeName.

bool	IsKind (const opencascade::handle< Standard_Type > &theType) const
	Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism.

bool	IsKind (const char *const theTypeName) const
	Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism.

Standard_Transient *	This () const
	Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero.

int	GetRefCount () const noexcept
	Get the reference counter of this object.

void	IncrementRefCounter () noexcept
	Increments the reference counter of this object. Uses relaxed memory ordering since incrementing only requires atomicity, not synchronization with other memory operations.

int	DecrementRefCounter () noexcept
	Decrements the reference counter of this object; returns the decremented value. Uses release ordering for the decrement to ensure all writes to the object are visible before the count reaches zero. An acquire fence is added only when the count reaches zero, ensuring proper synchronization before deletion. This is more efficient than using acq_rel for every decrement.

virtual void	Delete () const
	Memory deallocator for transient classes.

Protected Member Functions
	TDF_AttributeDelta (const occ::handle< TDF_Attribute > &anAttribute)

Additional Inherited Members
Public Types inherited from Standard_Transient
typedef void	base_type
	Returns a type descriptor about this object.

Static Public Member Functions inherited from Standard_Transient
static constexpr const char *	get_type_name ()
	Returns a type descriptor about this object.

static const opencascade::handle< Standard_Type > &	get_type_descriptor ()
	Returns type descriptor of Standard_Transient class.

Detailed Description

This class describes the services we need to implement Delta and Undo/Redo services.

AttributeDeltas are applied in an unpredictable order. But by the redefinition of the method IsNowApplicable, a condition can be verified before application. If the AttributeDelta is not yet applicable, it is put at the end of the AttributeDelta list, to be treated later. If a dead lock if found on the list, the AttributeDeltas are forced to be applied in an unpredictable order.

Constructor & Destructor Documentation

◆ TDF_AttributeDelta()

TDF_AttributeDelta::TDF_AttributeDelta ( const occ::handle< TDF_Attribute > & anAttribute )

protected

Member Function Documentation

◆ Apply()

virtual void TDF_AttributeDelta::Apply ( )

pure virtual

Applies the delta to the attribute.

Implemented in TNaming_DeltaOnModification, TNaming_DeltaOnRemoval, TDataStd_DeltaOnModificationOfByteArray, TDataStd_DeltaOnModificationOfExtStringArray, TDataStd_DeltaOnModificationOfIntArray, TDataStd_DeltaOnModificationOfIntPackedMap, TDataStd_DeltaOnModificationOfRealArray, TDF_DefaultDeltaOnModification, TDF_DefaultDeltaOnRemoval, TDF_DeltaOnAddition, TDF_DeltaOnForget, TDF_DeltaOnModification, and TDF_DeltaOnResume.

◆ Attribute()

occ::handle< TDF_Attribute > TDF_AttributeDelta::Attribute ( ) const

Returns the reference attribute.

◆ Dump()

virtual Standard_OStream & TDF_AttributeDelta::Dump ( Standard_OStream & OS ) const

virtual

Dumps the contents.

◆ DumpJson()

virtual void TDF_AttributeDelta::DumpJson	(	Standard_OStream &	theOStream,
		int	theDepth = -1 ) const

virtual

Dumps the content of me into the stream.

Reimplemented in TDF_DeltaOnResume.

◆ ID()

Standard_GUID TDF_AttributeDelta::ID ( ) const

Returns the ID of the attribute concerned by <me>.

◆ Label()

TDF_Label TDF_AttributeDelta::Label ( ) const

Returns the label concerned by <me>.

◆ operator<<()

Standard_OStream & TDF_AttributeDelta::operator<< ( Standard_OStream & OS ) const

inline

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

TDF_AttributeDelta.hxx

Public Member Functions

Protected Member Functions

Additional Inherited Members