Expression attribute.
====================

More...

#include <TDataStd_Expression.hxx>

Inheritance diagram for TDataStd_Expression:

Public Member Functions
	TDataStd_Expression ()

TCollection_ExtendedString	Name () const
	build and return the expression name More...

void	SetExpression (const TCollection_ExtendedString &E)

const TCollection_ExtendedString &	GetExpression () const

TDF_AttributeList &	GetVariables ()

const Standard_GUID &	ID () const
	Returns the ID of the attribute. <br> More...

void	Restore (const Handle< TDF_Attribute > &With)
	Restores the backuped contents from <anAttribute> into this one. It is used when aborting a transaction. More...

Handle_TDF_Attribute	NewEmpty () const
	Returns an new empty attribute from the good end type. It is used by the copy algorithm. More...

void	Paste (const Handle< TDF_Attribute > &Into, const Handle< TDF_RelocationTable > &RT) const
	This method is different from the "Copy" one, <br> because it is used when copying an attribute from <br> a source structure into a target structure. This <br> method may paste the contents of <me> into <br> <intoAttribute>. <br> The given pasted attribute can be full or empty of its contents. But don't make a NEW! Just set the contents! It is possible to use <aRelocationTable> to get/set the relocation value of a source attribute. More...

virtual Standard_OStream &	Dump (Standard_OStream &anOS) const
	Dumps the minimum information about <me> on <br> <aStream>. <br> More...

Public Member Functions inherited from TDF_Attribute
const TDF_Label	Label () const
	Returns the label to which the attribute is <br> attached. If the label is not included in a DF, <br> the label is null. See Label. <br> Warning If the label is not included in a data framework, it is null. This function should not be redefined inline. More...

Standard_Integer	Transaction () const
	Returns the transaction index in which the <br> attribute has been created or modified. <br> More...

Standard_Integer	UntilTransaction () const
	Returns the upper transaction index until which the attribute is/was valid. This number may vary. A removed attribute validity range is reduced to its transaction index. More...

Standard_Boolean	IsValid () const
	Returns true if the attribute is valid; i.e. not a <br> backuped or removed one. <br> More...

Standard_Boolean	IsNew () const
	Returns true if the attribute has no backup <br> More...

Standard_Boolean	IsForgotten () const
	Returns true if the attribute forgotten status is <br> set. <br> //! ShortCut Methods concerning associated attributes ================================================= More...

Standard_Boolean	IsAttribute (const Standard_GUID &anID) const
	Returns true if it exists an associated attribute of <me> with <anID> as ID. More...

Standard_Boolean	FindAttribute (const Standard_GUID &anID, Handle< TDF_Attribute > &anAttribute) const
	Finds an associated attribute of <me>, according <br> to <anID>. the returned <anAttribute> is a valid <br> one. The method returns True if found, False <br> otherwise. A removed attribute cannot be found using <br> this method. More...

void	AddAttribute (const Handle< TDF_Attribute > &other) const
	Adds an Attribute <other> to the label of <me>.Raises if there is already one of the same GUID fhan <other>. More...

Standard_Boolean	ForgetAttribute (const Standard_GUID &aguid) const
	Forgets the Attribute of GUID <aguid> associated to the label of <me>. Be carefull that if <me> is the attribute of <guid>, <me> will have a null label after this call. If the attribute doesn't exist returns False. Otherwise returns True. More...

void	ForgetAllAttributes (const Standard_Boolean clearChildren=Standard_True) const
	Forgets all the attributes attached to the label of <me>. Does it on the sub-labels if <clearChildren> is set to true. Of course, this method is compatible with Transaction & Delta mecanisms. Be carefull that if <me> will have a null label after this call More...

virtual void	AfterAddition ()
	Something to do after adding an Attribute to a label. More...

virtual void	BeforeRemoval ()
	Something to do before removing an Attribute from a label. More...

virtual void	BeforeForget ()
	Something to do before forgetting an Attribute to a label. More...

virtual void	AfterResume ()
	Something to do after resuming an Attribute from a label. More...

virtual Standard_Boolean	AfterRetrieval (const Standard_Boolean forceIt=Standard_False)
	Something to do AFTER creation of an attribute by persistent-transient translation. The returned status says if AfterUndo has been performed (true) or if this callback must be called once again further (false). If <forceIt> is set to true, the method MUST perform and return true. Does nothing by default and returns true. More...

virtual Standard_Boolean	BeforeUndo (const Handle< TDF_AttributeDelta > &anAttDelta, const Standard_Boolean forceIt=Standard_False)
	Something to do before applying <anAttDelta>. The returned status says if AfterUndo has been performed (true) or if this callback must be called once again further (false). If <forceIt> is set to true, the method MUST perform and return true. Does nothing by default and returns true. More...

virtual Standard_Boolean	AfterUndo (const Handle< TDF_AttributeDelta > &anAttDelta, const Standard_Boolean forceIt=Standard_False)
	Something to do after applying <anAttDelta>. The returned status says if AfterUndo has been performed (true) or if this callback must be called once again further (false). If <forceIt> is set to true, the method MUST perform and return true. Does nothing by default and returns true. More...

virtual void	BeforeCommitTransaction ()
	A callback. By default does nothing. It is called by TDF_Data::CommitTransaction() method. More...

void	Backup ()
	Backups the attribute. The backuped attribute is <br> flagged "Backuped" and not "Valid". <br> The method does nothing: 1) If the attribute transaction number is equal to the current transaction number (the attribute has already been backuped). 2) If the attribute is not attached to a label. More...

Standard_Boolean	IsBackuped () const
	Returns true if the attribute backup status is <br> set. This status is set/unset by the <br> Backup() method. <br> More...

virtual Handle_TDF_Attribute	BackupCopy () const
	Copies the attribute contents into a new other attribute. It is used by Backup(). More...

virtual Handle_TDF_DeltaOnAddition	DeltaOnAddition () const
	Makes an AttributeDelta because <me> appeared. The only known use of a redefinition of this method is to return a null handle (no delta). More...

virtual Handle_TDF_DeltaOnForget	DeltaOnForget () const
	Makes an AttributeDelta because <me> has been forgotten. More...

virtual Handle_TDF_DeltaOnResume	DeltaOnResume () const
	Makes an AttributeDelta because <me> has been resumed. More...

virtual Handle_TDF_DeltaOnModification	DeltaOnModification (const Handle< TDF_Attribute > &anOldAttribute) const
	Makes a DeltaOnModification between <me> and <anOldAttribute. More...

virtual void	DeltaOnModification (const Handle< TDF_DeltaOnModification > &aDelta)
	Applies a DeltaOnModification to <me>. More...

virtual Handle_TDF_DeltaOnRemoval	DeltaOnRemoval () const
	Makes a DeltaOnRemoval on <me> because <me> has disappeared from the DS. More...

virtual void	References (const Handle< TDF_DataSet > &aDataSet) const
	Adds the first level referenced attributes and labels <br> to <aDataSet>. <br> For this, use the AddLabel or AddAttribute of DataSet. If there is none, do not implement the method. More...

Standard_OStream &	operator<< (Standard_OStream &anOS) const

virtual void	ExtendedDump (Standard_OStream &anOS, const TDF_IDFilter &aFilter, TDF_AttributeIndexedMap &aMap) const
	Dumps the attribute content on <aStream>, using <aMap> like this: if an attribute is not in the map, first put add it to the map and then dump it. Use the map rank instead of dumping each attribute field. More...

void	Forget (const Standard_Integer aTransaction)
	Forgets the attribute. <aTransaction> is the <br> current transaction in which the forget is done. A <br> forgotten attribute is also flagged not "Valid". <br> A forgotten attribute is invisible. Set also the "Valid" status to False. Obvioulsy, DF cannot empty an attribute (this has a semantic signification), but can remove it from the structure. So, a forgotten attribute is NOT an empty one, but a soon DEAD one. Should be private. More...

Public Member Functions inherited from MMgt_TShared
virtual void	Delete () const
	Memory deallocator for transient classes. More...

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

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

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

virtual	~Standard_Transient ()
	Destructor must be virtual. More...

virtual void	ShallowDump (Standard_OStream &) const

virtual const Handle_Standard_Type &	DynamicType () const
	Returns a type information object about this object. More...

Standard_Boolean	IsInstance (const Handle_Standard_Type &theType) const
	Returns a true value if this is an instance of Type. More...

Standard_Boolean	IsInstance (const Standard_CString theTypeName) const
	Returns a true value if this is an instance of TypeName. More...

Standard_Boolean	IsKind (const 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. More...

Standard_Boolean	IsKind (const Standard_CString 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. More...

virtual Handle_Standard_Transient	This () const
	Returns a Handle which references this object. Must never be called to objects created in stack. More...

Standard_Integer	GetRefCount () const
	Get the reference counter of this object. More...

Static Public Member Functions
static const Standard_GUID &	GetID ()
	class methods ============= More...

static Handle_TDataStd_Expression	Set (const TDF_Label &label)
	Find, or create, an Expression attribute. //! Expressionmethods ============ More...

Additional Inherited Members
Protected Member Functions inherited from TDF_Attribute
	TDF_Attribute ()
	Initializes fields. More...

Detailed Description

Expression attribute.
====================

       * Data Structure  of the Expression   is stored in a <br>
      string and references to variables used by the string <br>

Warning: To be consistent, each Variable referenced by the
expression must have its equivalent in the string

Constructor & Destructor Documentation

TDataStd_Expression::TDataStd_Expression ( )

Member Function Documentation

virtual Standard_OStream& TDataStd_Expression::Dump ( Standard_OStream & anOS ) const

virtual

 Dumps the minimum information about <me> on <br>
     <aStream>. <br>

Reimplemented from TDF_Attribute.

const TCollection_ExtendedString& TDataStd_Expression::GetExpression ( ) const

static const Standard_GUID& TDataStd_Expression::GetID ( )

static

class methods
=============

TDF_AttributeList& TDataStd_Expression::GetVariables ( )

const Standard_GUID& TDataStd_Expression::ID ( ) const

virtual

 Returns the ID of the attribute. <br>

Implements TDF_Attribute.

TCollection_ExtendedString TDataStd_Expression::Name ( ) const

build and return the expression name

Handle_TDF_Attribute TDataStd_Expression::NewEmpty ( ) const

virtual

Returns an new empty attribute from the good end
type. It is used by the copy algorithm.

Implements TDF_Attribute.

void TDataStd_Expression::Paste	(	const Handle< TDF_Attribute > &	intoAttribute,
		const Handle< TDF_RelocationTable > &	aRelocationTable
	)		const

virtual

 This method is different from the "Copy" one, <br>
     because it is used when copying an attribute from <br>
     a source structure into a target structure. This <br>
     method may paste the contents of <me> into <br>
     <intoAttribute>. <br>

The given pasted attribute can be full or empty of
its contents. But don't make a NEW! Just set the
contents!

It is possible to use <aRelocationTable> to
get/set the relocation value of a source
attribute.

Implements TDF_Attribute.

void TDataStd_Expression::Restore ( const Handle< TDF_Attribute > & anAttribute )

virtual

Restores the backuped contents from <anAttribute>
into this one. It is used when aborting a
transaction.

Implements TDF_Attribute.

static Handle_TDataStd_Expression TDataStd_Expression::Set ( const TDF_Label & label )

static

Find, or create, an Expression attribute.
//! Expressionmethods
============

void TDataStd_Expression::SetExpression ( const TCollection_ExtendedString & E )

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

TDataStd_Expression.hxx

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation