A set of AttributeDelta for a given transaction number and reference time number. A delta set is available at <aSourceTime>. If applied, it restores the TDF_Data in the state it was at <aTargetTime>. More...

#include <TDF_Delta.hxx>

Inheritance diagram for TDF_Delta:

[legend]

Public Member Functions
	TDF_Delta ()
	Creates a delta.

bool	IsEmpty () const
	Returns true if there is nothing to undo.

bool	IsApplicable (const int aCurrentTime) const
	Returns true if the Undo action of <me> is applicable at <aCurrentTime>.

int	BeginTime () const
	Returns the field <myBeginTime>.

int	EndTime () const
	Returns the field <myEndTime>.

void	Labels (NCollection_List< TDF_Label > &aLabelList) const
	Adds in <aLabelList> the labels of the attribute deltas. Caution: <aLabelList> is not cleared before use.

const NCollection_List< occ::handle< TDF_AttributeDelta > > &	AttributeDeltas () const
	Returns the field <myAttDeltaList>.

TCollection_ExtendedString	Name () const
	Returns a name associated with this delta.

void	SetName (const TCollection_ExtendedString &theName)
	Associates a name <theName> with this delta.

void	Dump (Standard_OStream &OS) const

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
void	Validity (const int aBeginTime, const int anEndTime)
	Validates <me> at <aBeginTime>. If applied, it restores the TDF_Data in the state it was at <anEndTime>. Reserved to TDF_Data.

void	AddAttributeDelta (const occ::handle< TDF_AttributeDelta > &anAttributeDelta)
	Adds an AttributeDelta to the list. Reserved to TDF_Data.

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

A set of AttributeDelta for a given transaction number and reference time number. A delta set is available at <aSourceTime>. If applied, it restores the TDF_Data in the state it was at <aTargetTime>.

Constructor & Destructor Documentation

◆ TDF_Delta()

TDF_Delta::TDF_Delta ( )

Creates a delta.

Member Function Documentation

◆ AddAttributeDelta()

void TDF_Delta::AddAttributeDelta ( const occ::handle< TDF_AttributeDelta > & anAttributeDelta )

protected

Adds an AttributeDelta to the list. Reserved to TDF_Data.

◆ AttributeDeltas()

const NCollection_List< occ::handle< TDF_AttributeDelta > > & TDF_Delta::AttributeDeltas ( ) const

Returns the field <myAttDeltaList>.

◆ BeginTime()

int TDF_Delta::BeginTime ( ) const

Returns the field <myBeginTime>.

◆ Dump()

void TDF_Delta::Dump ( Standard_OStream & OS ) const

◆ DumpJson()

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

Dumps the content of me into the stream.

◆ EndTime()

int TDF_Delta::EndTime ( ) const

Returns the field <myEndTime>.

◆ IsApplicable()

bool TDF_Delta::IsApplicable ( const int aCurrentTime ) const

Returns true if the Undo action of <me> is applicable at <aCurrentTime>.

◆ IsEmpty()

bool TDF_Delta::IsEmpty ( ) const

Returns true if there is nothing to undo.

◆ Labels()

void TDF_Delta::Labels ( NCollection_List< TDF_Label > & aLabelList ) const

Adds in <aLabelList> the labels of the attribute deltas. Caution: <aLabelList> is not cleared before use.

◆ Name()

TCollection_ExtendedString TDF_Delta::Name ( ) const

Returns a name associated with this delta.

◆ SetName()

void TDF_Delta::SetName ( const TCollection_ExtendedString & theName )

Associates a name <theName> with this delta.

◆ Validity()

void TDF_Delta::Validity	(	const int	aBeginTime,
		const int	anEndTime )