berry::IMemento Struct Reference

#include <berryIMemento.h>

Inheritance diagram for berry::IMemento:

Collaboration diagram for berry::IMemento:

Public Member Functions
	berryObjectMacro (berry::IMemento) static const QString TAG_ID
virtual IMemento::Pointer	CreateChild (const QString &type)=0
virtual IMemento::Pointer	CreateChild (const QString &type, const QString &id)=0
virtual IMemento::Pointer	GetChild (const QString &type) const =0
virtual QList< IMemento::Pointer >	GetChildren (const QString &type) const =0
virtual bool	GetFloat (const QString &key, double &value) const =0
virtual bool	GetInteger (const QString &key, int &value) const =0
virtual bool	GetString (const QString &key, QString &value) const =0
virtual bool	GetBoolean (const QString &key, bool &value) const =0
virtual QString	GetTextData () const =0
virtual QList< QString >	GetAttributeKeys () const =0
virtual QString	GetType () const =0
virtual QString	GetID () const =0
virtual void	PutFloat (const QString &key, double value)=0
virtual void	PutInteger (const QString &key, int value)=0
virtual void	PutMemento (IMemento::Pointer memento)=0
virtual void	PutString (const QString &key, const QString &value)=0
virtual void	PutBoolean (const QString &key, bool value)=0
virtual void	PutTextData (const QString &data)=0
virtual	~IMemento ()
Public Member Functions inherited from berry::Object
virtual QString	GetClassName () const
virtual Reflection::TypeInfo	GetTypeInfo () const
virtual QList< Reflection::TypeInfo >	GetSuperclasses () const
virtual void	Delete ()
QDebug	Print (QDebug os, Indent Indent=0) const
virtual QString	ToString () const
virtual uint	HashCode () const
virtual bool	operator< (const Object *) const
void	Register () const
void	UnRegister (bool del=true) const
int	GetReferenceCount () const
void	SetReferenceCount (int)
void	AddDestroyListener (const MessageAbstractDelegate<> &delegate) const
void	RemoveDestroyListener (const MessageAbstractDelegate<> &delegate) const
virtual bool	operator== (const Object *) const

Additional Inherited Members
Public Types inherited from berry::Object
typedef Object	Self
typedef berry::SmartPointer< Self >	Pointer
typedef berry::SmartPointer< const Self >	ConstPointer
typedef berry::WeakPointer< Self >	WeakPtr
typedef berry::WeakPointer< const Self >	ConstWeakPtr
Static Public Member Functions inherited from berry::Object
static const char *	GetStaticClassName ()
static Reflection::TypeInfo	GetStaticTypeInfo ()
static QList< Reflection::TypeInfo >	GetStaticSuperclasses ()
Protected Member Functions inherited from berry::Object
	Object ()
virtual	~Object ()
virtual QDebug	PrintSelf (QDebug os, Indent indent) const
virtual QDebug	PrintHeader (QDebug os, Indent indent) const
virtual QDebug	PrintTrailer (QDebug os, Indent indent) const
Protected Attributes inherited from berry::Object
QAtomicInt	m_ReferenceCount
QMutex	m_ReferenceCountLock

Detailed Description

Interface to a memento used for saving the important state of an object in a form that can be persisted in the file system.

Mementos were designed with the following requirements in mind:

1. Certain objects need to be saved and restored across platform sessions.
2. When an object is restored, an appropriate class for an object might not be available. It must be possible to skip an object in this case.
3. When an object is restored, the appropriate class for the object may be different from the one when the object was originally saved. If so, the new class should still be able to read the old form of the data.

Mementos meet these requirements by providing support for storing a mapping of arbitrary string keys to primitive values, and by allowing mementos to have other mementos as children (arranged into a tree). A robust external storage format based on XML is used.

The key for an attribute may be any alpha numeric value. However, the value of TAG_ID is reserved for internal use.

This interface is not intended to be implemented or extended by clients.

See also

IPersistableElement

IElementFactory This interface is not intended to be implemented by clients.

Definition at line 64 of file berryIMemento.h.

Constructor & Destructor Documentation

berry::IMemento::~IMemento ( )

virtual

Definition at line 23 of file berryIMemento.cpp.

Member Function Documentation

berry::IMemento::berryObjectMacro

(

berry::IMemento

)

const

Special reserved key used to store the memento id (value "IMemento.internal.id").

See also

#getID()

virtual IMemento::Pointer berry::IMemento::CreateChild ( const QString &  type )

pure virtual

Creates a new child of this memento with the given type.

The GetChild and GetChildren methods are used to retrieve children of a given type.

Parameters

type

the type

Returns

a new child memento

See also

GetChild

GetChildren

Implemented in berry::XMLMemento.

virtual IMemento::Pointer berry::IMemento::CreateChild ( const QString &  type, const QString &  id  )

pure virtual

Creates a new child of this memento with the given type and id. The id is stored in the child memento (using a special reserved key, TAG_ID) and can be retrieved using GetID.

The GetChild and GetChildren methods are used to retrieve children of a given type.

Parameters

type	the type
id	the child id

Returns

a new child memento with the given type and id

See also

GetID

Implemented in berry::XMLMemento.

virtual QList<QString> berry::IMemento::GetAttributeKeys ( ) const

pure virtual

Returns an array of all the attribute keys of the memento. This will not be null. If there are no keys, an array of length zero will be returned.

Returns

an array with all the attribute keys of the memento

Implemented in berry::XMLMemento.

virtual bool berry::IMemento::GetBoolean ( const QString &  key, bool &  value  ) const

pure virtual

Gets the boolean value of the given key.

Parameters

key	the key
value	the value of the given key

Returns

false if the key was not found, else true

Implemented in berry::XMLMemento.

virtual IMemento::Pointer berry::IMemento::GetChild ( const QString &  type ) const

pure virtual

Returns the first child with the given type id.

Parameters

type	the type id

Returns

the first child with the given type

Implemented in berry::XMLMemento.

virtual QList<IMemento::Pointer> berry::IMemento::GetChildren ( const QString &  type ) const

pure virtual

Returns all children with the given type id.

Parameters

type	the type id

Returns

an array of children with the given type

Implemented in berry::XMLMemento.

virtual bool berry::IMemento::GetFloat ( const QString &  key, double &  value  ) const

pure virtual

Gets the floating point value of the given key.

Parameters

key	the key
value	the value of the given key

Returns

false if the key was not found or was found but was not a floating point number, else true

Implemented in berry::XMLMemento.

virtual QString berry::IMemento::GetID ( ) const

pure virtual

Returns the id for this memento.

Returns

the memento id, or "" if none

See also

CreateChild(const QString&, const QString&)

Implemented in berry::XMLMemento.

virtual bool berry::IMemento::GetInteger ( const QString &  key, int &  value  ) const

pure virtual

Gets the integer value of the given key.

Parameters

key	the key
value	the value of the given key

Returns

false if the key was not found or was found but was not an integer, else true

Implemented in berry::XMLMemento.

virtual bool berry::IMemento::GetString ( const QString &  key, QString &  value  ) const

pure virtual

Gets the string value of the given key.

Parameters

key	the key
value	the value of the given key

Returns

false if the key was not found, else true

Implemented in berry::XMLMemento.

virtual QString berry::IMemento::GetTextData ( ) const

pure virtual

Returns the data of the Text node of the memento. Each memento is allowed only one Text node.

Returns

the data of the Text node of the memento, or null if the memento has no Text node.

Implemented in berry::XMLMemento.

virtual QString berry::IMemento::GetType ( ) const

pure virtual

Returns the type for this memento.

Returns

the memento type

See also

CreateChild(const QString&)

CreateChild(const QString&, const QString&)

Implemented in berry::XMLMemento.

virtual void berry::IMemento::PutBoolean ( const QString &  key, bool  value  )

pure virtual

Sets the value of the given key to the given boolean value.

Parameters

key	the key
value	the value

Implemented in berry::XMLMemento.

virtual void berry::IMemento::PutFloat ( const QString &  key, double  value  )

pure virtual

Sets the value of the given key to the given floating point number.

Parameters

key	the key
value	the value

Implemented in berry::XMLMemento.

virtual void berry::IMemento::PutInteger ( const QString &  key, int  value  )

pure virtual

Sets the value of the given key to the given integer.

Parameters

key	the key
value	the value

Implemented in berry::XMLMemento.

virtual void berry::IMemento::PutMemento ( IMemento::Pointer  memento )

pure virtual

Copy the attributes and children from memento to the receiver.

Parameters

memento

the IMemento to be copied.

Implemented in berry::XMLMemento.

virtual void berry::IMemento::PutString ( const QString &  key, const QString &  value  )

pure virtual

Sets the value of the given key to the given const QString&.

Parameters

key	the key
value	the value

Implemented in berry::XMLMemento.

virtual void berry::IMemento::PutTextData ( const QString &  data )

pure virtual

Sets the memento's Text node to contain the given data. Creates the Text node if none exists. If a Text node does exist, it's current contents are replaced. Each memento is allowed only one text node.

Parameters

data	the data to be placed on the Text node

Implemented in berry::XMLMemento.

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The documentation for this struct was generated from the following files:

• berryIMemento.h
• berryIMemento.cpp