A picture memorizing the data stored in a container (for example, in a file). A Storage_Data object represents either: More...

#include <Storage_Data.hxx>

Inheritance diagram for Storage_Data:

[legend]

Public Member Functions
	Storage_Data ()
	Creates an empty set of data. You explicitly create a Storage_Data object when preparing the set of objects to be stored together in a container (for example, in a file). Then use the function AddRoot to add persistent objects to the set of data. A Storage_Data object is also returned by the Read function of a Storage_Schema storage/retrieval algorithm. Use the functions NumberOfRoots and Roots to find the roots which were stored in the read container.

Storage_Error	ErrorStatus () const
	Returns Storage_VSOk if.

void	ClearErrorStatus ()
	Clears the error status positioned either by:

TCollection_AsciiString	ErrorStatusExtension () const

TCollection_AsciiString	CreationDate () const
	return the creation date

TCollection_AsciiString	StorageVersion () const
	return the Storage package version

TCollection_AsciiString	SchemaVersion () const
	get the version of the schema

TCollection_AsciiString	SchemaName () const
	get the schema's name

void	SetApplicationVersion (const TCollection_AsciiString &aVersion)
	set the version of the application

TCollection_AsciiString	ApplicationVersion () const
	get the version of the application

void	SetApplicationName (const TCollection_ExtendedString &aName)
	set the name of the application

TCollection_ExtendedString	ApplicationName () const
	get the name of the application

void	SetDataType (const TCollection_ExtendedString &aType)
	set the data type

TCollection_ExtendedString	DataType () const
	returns data type

void	AddToUserInfo (const TCollection_AsciiString &anInfo)
	add <theUserInfo> to the user information

const TColStd_SequenceOfAsciiString &	UserInfo () const
	return the user information

void	AddToComments (const TCollection_ExtendedString &aComment)
	add <theUserInfo> to the user information

const TColStd_SequenceOfExtendedString &	Comments () const
	return the user information

Standard_Integer	NumberOfObjects () const
	the number of persistent objects Return: the number of persistent objects readed

Standard_Integer	NumberOfRoots () const
	Returns the number of root objects in this set of data.

void	AddRoot (const Handle< Standard_Persistent > &anObject) const
	add a persistent root to write. the name of the root is a driver reference number.

void	AddRoot (const TCollection_AsciiString &aName, const Handle< Standard_Persistent > &anObject) const
	Adds the root anObject to this set of data. The name of the root is aName if given; if not, it will be a reference number assigned by the driver when writing the set of data into the container. When naming the roots, it is easier to retrieve objects by significant references rather than by references without any semantic values.

void	RemoveRoot (const TCollection_AsciiString &aName)
	Removes from this set of data the root object named aName. Warning Nothing is done if there is no root object whose name is aName in this set of data.

Handle< Storage_HSeqOfRoot >	Roots () const
	Returns the roots of this set of data in a sequence.

Handle< Storage_Root >	Find (const TCollection_AsciiString &aName) const
	Gives the root object whose name is aName in this set of data. The returned object is a Storage_Root object, from which the object it encapsulates may be extracted. Warning A null handle is returned if there is no root object whose name is aName in this set of data.

Standard_Boolean	IsRoot (const TCollection_AsciiString &aName) const
	returns Standard_True if <me> contains a root named <aName>

Standard_Integer	NumberOfTypes () const
	Returns the number of types of objects used in this set of data.

Standard_Boolean	IsType (const TCollection_AsciiString &aName) const
	Returns true if this set of data contains an object of type aName. Persistent objects from this set of data must have types which are recognized by the Storage_Schema algorithm used to store or retrieve them.

Handle< TColStd_HSequenceOfAsciiString >	Types () const
	Gives the list of types of objects used in this set of data in a sequence.

Handle< Storage_HeaderData >	HeaderData () const

Handle< Storage_RootData >	RootData () const

Handle< Storage_TypeData >	TypeData () const

Handle< Storage_InternalData >	InternalData () const

void	Clear () const

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 ()
	Destructor must be virtual.

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

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

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

Standard_Boolean	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.

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.

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.

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

void	IncrementRefCounter () noexcept
	Increments the reference counter of this object.

Standard_Integer	DecrementRefCounter () noexcept
	Decrements the reference counter of this object; returns the decremented value.

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

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 picture memorizing the data stored in a container (for example, in a file). A Storage_Data object represents either:

persistent data to be written into a container, or
persistent data which are read from a container. A Storage_Data object is used in both the storage and retrieval operations:
Storage mechanism: create an empty Storage_Data object, then add successively persistent objects (roots) to be stored using the function AddRoot. When the set of data is complete, write it to a container using the function Write in your Storage_Schema storage/retrieval algorithm.
Retrieval mechanism: a Storage_Data object is returned by the Read function from your Storage_Schema storage/retrieval algorithm. Use the functions NumberOfRoots and Roots to find the roots which were stored in the read container. The roots of a Storage_Data object may share references on objects. The shared internal references of a Storage_Data object are maintained by the storage/retrieval mechanism. Note: References shared by objects which are contained in two distinct Storage_Data objects are not maintained by the storage/retrieval mechanism: external references are not supported by Storage_Schema algorithm

Constructor & Destructor Documentation

◆ Storage_Data()

Storage_Data::Storage_Data ( )

Creates an empty set of data. You explicitly create a Storage_Data object when preparing the set of objects to be stored together in a container (for example, in a file). Then use the function AddRoot to add persistent objects to the set of data. A Storage_Data object is also returned by the Read function of a Storage_Schema storage/retrieval algorithm. Use the functions NumberOfRoots and Roots to find the roots which were stored in the read container.

Member Function Documentation

◆ AddRoot() [1/2]

void Storage_Data::AddRoot ( const Handle< Standard_Persistent > & anObject ) const

add a persistent root to write. the name of the root is a driver reference number.

◆ AddRoot() [2/2]

void Storage_Data::AddRoot	(	const TCollection_AsciiString &	aName,
		const Handle< Standard_Persistent > &	anObject ) const

Adds the root anObject to this set of data. The name of the root is aName if given; if not, it will be a reference number assigned by the driver when writing the set of data into the container. When naming the roots, it is easier to retrieve objects by significant references rather than by references without any semantic values.

◆ AddToComments()

void Storage_Data::AddToComments ( const TCollection_ExtendedString & aComment )

add <theUserInfo> to the user information

◆ AddToUserInfo()

void Storage_Data::AddToUserInfo ( const TCollection_AsciiString & anInfo )

add <theUserInfo> to the user information

◆ ApplicationName()

TCollection_ExtendedString Storage_Data::ApplicationName ( ) const

get the name of the application

◆ ApplicationVersion()

TCollection_AsciiString Storage_Data::ApplicationVersion ( ) const

get the version of the application

◆ Clear()

void Storage_Data::Clear ( ) const

◆ ClearErrorStatus()

void Storage_Data::ClearErrorStatus ( )

Clears the error status positioned either by:

the last storage operation performed with the Read function, or
the last retrieval operation performed with the Write function by a Storage_Schema algorithm, on this set of data. This error status may be read by the function ErrorStatus.

◆ Comments()

const TColStd_SequenceOfExtendedString & Storage_Data::Comments ( ) const

return the user information

◆ CreationDate()

TCollection_AsciiString Storage_Data::CreationDate ( ) const

return the creation date

◆ DataType()

TCollection_ExtendedString Storage_Data::DataType ( ) const

returns data type

◆ ErrorStatus()

Storage_Error Storage_Data::ErrorStatus ( ) const

Returns Storage_VSOk if.

the last storage operation performed with the function Read, or
the last retrieval operation performed with the function Write by a Storage_Schema algorithm, on this set of data was successful. If the storage or retrieval operation was not performed, the returned error status indicates the reason why the operation failed. The algorithm stops its analysis at the first detected error

◆ ErrorStatusExtension()

TCollection_AsciiString Storage_Data::ErrorStatusExtension ( ) const

◆ Find()

Handle< Storage_Root > Storage_Data::Find ( const TCollection_AsciiString & aName ) const

Gives the root object whose name is aName in this set of data. The returned object is a Storage_Root object, from which the object it encapsulates may be extracted. Warning A null handle is returned if there is no root object whose name is aName in this set of data.

◆ HeaderData()

Handle< Storage_HeaderData > Storage_Data::HeaderData ( ) const

◆ InternalData()

Handle< Storage_InternalData > Storage_Data::InternalData ( ) const

◆ IsRoot()

Standard_Boolean Storage_Data::IsRoot ( const TCollection_AsciiString & aName ) const

returns Standard_True if <me> contains a root named <aName>

◆ IsType()

Standard_Boolean Storage_Data::IsType ( const TCollection_AsciiString & aName ) const

Returns true if this set of data contains an object of type aName. Persistent objects from this set of data must have types which are recognized by the Storage_Schema algorithm used to store or retrieve them.

◆ NumberOfObjects()

Standard_Integer Storage_Data::NumberOfObjects ( ) const

the number of persistent objects Return: the number of persistent objects readed

◆ NumberOfRoots()

Standard_Integer Storage_Data::NumberOfRoots ( ) const

Returns the number of root objects in this set of data.

When preparing a storage operation, the result is the number of roots inserted into this set of data with the function AddRoot.
When retrieving an object, the result is the number of roots stored in the read container. Use the Roots function to get these roots in a sequence.

◆ NumberOfTypes()

Standard_Integer Storage_Data::NumberOfTypes ( ) const

Returns the number of types of objects used in this set of data.

◆ RemoveRoot()

void Storage_Data::RemoveRoot ( const TCollection_AsciiString & aName )

Removes from this set of data the root object named aName. Warning Nothing is done if there is no root object whose name is aName in this set of data.

◆ RootData()

Handle< Storage_RootData > Storage_Data::RootData ( ) const

◆ Roots()

Handle< Storage_HSeqOfRoot > Storage_Data::Roots ( ) const

Returns the roots of this set of data in a sequence.

When preparing a storage operation, the sequence contains the roots inserted into this set of data with the function AddRoot.
When retrieving an object, the sequence contains the roots stored in the container read.
An empty sequence is returned if there is no root in this set of data.

◆ SchemaName()

TCollection_AsciiString Storage_Data::SchemaName ( ) const

get the schema's name

◆ SchemaVersion()

TCollection_AsciiString Storage_Data::SchemaVersion ( ) const

get the version of the schema

◆ SetApplicationName()

void Storage_Data::SetApplicationName ( const TCollection_ExtendedString & aName )

set the name of the application

◆ SetApplicationVersion()

void Storage_Data::SetApplicationVersion ( const TCollection_AsciiString & aVersion )

set the version of the application

◆ SetDataType()

void Storage_Data::SetDataType ( const TCollection_ExtendedString & aType )

set the data type

◆ StorageVersion()

TCollection_AsciiString Storage_Data::StorageVersion ( ) const

return the Storage package version

◆ TypeData()

Handle< Storage_TypeData > Storage_Data::TypeData ( ) const

◆ Types()

Handle< TColStd_HSequenceOfAsciiString > Storage_Data::Types ( ) const

Gives the list of types of objects used in this set of data in a sequence.

◆ UserInfo()

const TColStd_SequenceOfAsciiString & Storage_Data::UserInfo ( ) const