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CXCFWEngine Class Reference

class CXCFWEngine : public CActive

XCFW Engine class Responsible for internalizing / externalizing XML files to and from a XCFW tree

XCFW.lib

Since: Series 60 3.1

Inherits from

CXCFWEngine
- CActive
  - CBase

Public Member Functions
	~CXCFWEngine ()
IMPORT_C void	AttributeDetailsL (const TInt , TPtrC &, TPtrC &, TBool &)
IMPORT_C void	AttributeDetailsL (const TInt , TPtrC &, TPtrC &)
IMPORT_C void	CancelOperation ()
void	ComposeFileCompleteL ()
IMPORT_C TXCFWEngineState	CurrentState ()
IMPORT_C TBool	HasTextData ()
IMPORT_C void	LoadL ( MXCFWTree &, const TDesC &)
IMPORT_C void	LoadL ( MXCFWTree &, const TDesC &, const TDesC &)
IMPORT_C CXCFWEngine *	NewL ( MXCFWEngineObserver *)
IMPORT_C TInt	NumAttributes ()
void	ParseFileCompleteL ()
IMPORT_C void	RegisterObjectFactoryL ( CGECOObjectFactoryBase *)
IMPORT_C void	SaveL ( MXCFWTree &, const TDesC &)
IMPORT_C void	SaveL ( MXCFWTree &, const TDesC &, const TDesC &)
IMPORT_C void	TextDetailsL ( TPtrC &, TBool &)
IMPORT_C TInt	UnRegisterObjectFactory ( CGECOObjectFactoryBase *)

Protected Member Functions
void	DoCancel ()
TInt	RunError ( TInt )
void	RunL ()

Private Member Functions
	CXCFWEngine ( MXCFWEngineObserver *)
void	AddCurrentTreeNodeToDOML ()
void	AddCurrentXMLNodeToTreeL ()
void	ConstructL ()
void	DOM2TreeNextCycleL ()
void	FreeResources ()
void	PrepareDTDPathL ()
void	PrepareEntityConverterAndSetActiveL ()
void	Tree2DOMNextCycleL ()

Inherited Functions
	CActive::CActive(TInt)
	CActive::Cancel()
	CActive::Deque()
	CActive::Extension_(TUint,TAny &,TAny )
	CActive::IsActive()const
	CActive::IsAdded()const
	CActive::Priority()const
	CActive::SetActive()
	CActive::SetPriority(TInt)
	CActive::~CActive()
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::operator new(TUint)
	CBase::operator new(TUint,TAny *)
	CBase::operator new(TUint,TLeave)
	CBase::operator new(TUint,TLeave,TUint)
	CBase::operator new(TUint,TUint)
	CBase::~CBase()

Public Member Enumerations
enum	TXCFWEngineState { EStateIdle = 0, EStateInitializingLoad , EStateLoadingFile , EStateInitializingSave , EStateSavingFile , EStateParsing , EStateConstructingDOM }

Inherited Enumerations
	CActive:TPriority

Private Attributes
CMDXMLComposer *	iComposer
CXCFWEntityConverter *	iConverter
MXCFWNode *	iCurrentTreeNode
CMDXMLNode *	iCurrentXMLNode
HBufC *	iDTD
CGECODefaultObjectFactory *	iDefaultFactory
RFactoryArray	iFactoryList
HBufC *	iFile
RFs	iFileSystem
CXCFWLocalizer *	iLocalizer
HBufC *	iNodeText
MXCFWEngineObserver *	iObserver
CMDXMLParser *	iParser
TXCFWEngineState	iState
TXCFWEngineState	iStateByLastError
MXCFWTree *	iTree
CMDXMLDocument *	iXMLDoc

Inherited Attributes
	CActive::iStatus

Constructor & Destructor Documentation

CXCFWEngine(MXCFWEngineObserver *)

CXCFWEngine

(

MXCFWEngineObserver *

aObserver

)

[private]

C++ default constructor.

Parameters

MXCFWEngineObserver * aObserver

Engine observer

~CXCFWEngine()

IMPORT_C

~CXCFWEngine

(

)

[virtual]

Destructor.

Member Functions Documentation

AddCurrentTreeNodeToDOML()

void

AddCurrentTreeNodeToDOML

(

)

[private]

Adds a XCFW Tree node to DOM Called repeatedly during parsing from Tree2DOMNextCycle()

Since: Series 60 3.1

AddCurrentXMLNodeToTreeL()

void

AddCurrentXMLNodeToTreeL

(

)

[private]

Adds a XML element to content tree Called repeatedly during parsing from Dom2TreeNextCycle()

Since: Series 60 3.1

AttributeDetailsL(const TInt, TPtrC &, TPtrC &, TBool &)

IMPORT_C void	AttributeDetailsL	(	const TInt	aIndex,
			TPtrC &	aAttributeName,
			TPtrC &	aAttributeValue,
			TBool &	aIsLocalized
		)

From MGECOAttributeProvider . Returns attribute details for given index.

Parameters

const TInt aIndex
TPtrC & aAttributeName
TPtrC & aAttributeValue
TBool & aIsLocalized

AttributeDetailsL(const TInt, TPtrC &, TPtrC &)

IMPORT_C void	AttributeDetailsL	(	const TInt	aIndex,
			TPtrC &	aAttributeName,
			TPtrC &	aAttributeValue
		)

From MGECOAttributeProvider . Returns attribute details for given index.

Parameters

const TInt aIndex
TPtrC & aAttributeName
TPtrC & aAttributeValue

CancelOperation()

IMPORT_C void

CancelOperation

(

)

Cancels currently ongoing load/save operation

Since: Series 60 3.1

ComposeFileCompleteL()

void

ComposeFileCompleteL

(

)

From MMDXMLComposerObserver . Called when DOM to XML composing is done.

ConstructL()

void

ConstructL

(

)

[private]

By default Symbian 2nd phase constructor is private.

CurrentState()

IMPORT_C TXCFWEngineState

CurrentState

(

)

Returns engine's current state Client may want to check state at error events

Since: Series 60 3.1

DOM2TreeNextCycleL()

void

DOM2TreeNextCycleL

(

)

[private]

Traverses XML DOM and constructs XCFW tree Each call to this function processes one DOM element

Since: Series 60 3.1

DoCancel()

void

DoCancel

(

)

[protected, virtual]

Implements cancellation of an outstanding request.

This function is called as part of the active object's Cancel() .

It must call the appropriate cancel function offered by the active object's asynchronous service provider. The asynchronous service provider's cancel is expected to act immediately.

DoCancel() must not wait for event completion; this is handled by Cancel() .

CActive::Cancel

FreeResources()

void

FreeResources

(

)

[private]

Frees resources used during parse / compose operation

Since: Series 60 3.1

HasTextData()

IMPORT_C TBool

HasTextData

(

)

From MGECOAttributeProvider . Returns ETrue if xml node has text data

LoadL(MXCFWTree &, const TDesC &)

IMPORT_C void	LoadL	(	MXCFWTree &	aTree,
			const TDesC &	aFile
		)

Loads given XML content definition to given tree. Operation is asynchronous. Engine will notify client through MXCFWEngineObserver interface when parsing completes. XCFW Engine will look for localization DTD based on the doctype declaration of loaded XML file. It assumes that the localization files are stored in language variant specific subdirectories under the directory where the loaded content file exists.

Since: Series 60 3.1

Parameters

MXCFWTree & aTree	Target tree to construct the content into
const TDesC & aFile	File to load

LoadL(MXCFWTree &, const TDesC &, const TDesC &)

IMPORT_C void	LoadL	(	MXCFWTree &	aTree,
			const TDesC &	aFile,
			const TDesC &	aDTDFile
		)

Loads given XML content definition to given tree with localized strings from given DTD file Operation is asynchronous.

Since: Series 60 3.1

Parameters

MXCFWTree & aTree	Target tree to construct the content into
const TDesC & aFile	File to load
const TDesC & aDTDFile	DTD to use for localization. This parameter overrides the possible DOCTYPE definition in the XML file.

NewL(MXCFWEngineObserver *)

IMPORT_C CXCFWEngine *

NewL

(

MXCFWEngineObserver *

aObserver

)

[static]

Two-phased constructor.

Parameters

MXCFWEngineObserver * aObserver

NumAttributes()

IMPORT_C TInt

NumAttributes

(

)

From MGECOAttributeProvider . Returns number of attributes for a xml tag.

ParseFileCompleteL()

void

ParseFileCompleteL

(

)

From MMDXMLParserObserver . Called when XML to DOM parsing is done

PrepareDTDPathL()

void

PrepareDTDPathL

(

)

[private]

Prepares DTD file path for localization file loading This function checks the DTD path from XML doctype declaration

PrepareEntityConverterAndSetActiveL()

void

PrepareEntityConverterAndSetActiveL

(

)

[private]

Loads DTD for the requested save / load op and sets engine active.

Since: Series 60 3.1

RegisterObjectFactoryL(CGECOObjectFactoryBase *)

IMPORT_C void

RegisterObjectFactoryL

(

CGECOObjectFactoryBase *

aFactory

)

Adds new object factory to engine factory array. Engine does NOT take ownership of the factory.

Since: Series 60 3.1

Parameters

CGECOObjectFactoryBase * aFactory

Object factory to add. Engine will query factories for objects when constructing tree.

RunError(TInt)

TInt

RunError

(

TInt

aError

)

[protected, virtual]

Parameters

TInt aError

RunL()

void

RunL

(

)

[protected, virtual]

Handles an active object's request completion event.

A derived class must provide an implementation to handle the completed request. If appropriate, it may issue another request.

The function is called by the active scheduler when a request completion event occurs, i.e. after the active scheduler's WaitForAnyRequest() function completes.

Before calling this active object's RunL() function, the active scheduler has:

1. decided that this is the highest priority active object with a completed request

2. marked this active object's request as complete (i.e. the request is no longer outstanding)

RunL() runs under a trap harness in the active scheduler. If it leaves, then the active scheduler calls RunError() to handle the leave.

Note that once the active scheduler's Start() function has been called, all user code is run under one of the program's active object's RunL() or RunError() functions.

CActiveScheduler::Start CActiveScheduler::Error CActiveScheduler::WaitForAnyRequest TRAPD

SaveL(MXCFWTree &, const TDesC &)

IMPORT_C void	SaveL	(	MXCFWTree &	aTree,
			const TDesC &	aFile
		)

Saves given Tree to given XML content definition file. Operation is asynchronous.

Since: Series 60 3.1

Parameters

MXCFWTree & aTree	Target tree to construct XML from
const TDesC & aFile	File to save the XML definition to

SaveL(MXCFWTree &, const TDesC &, const TDesC &)

IMPORT_C void	SaveL	(	MXCFWTree &	aTree,
			const TDesC &	aFile,
			const TDesC &	aDTDFile
		)

Saves given Tree to given XML content definition file with entity references from given DTD file. Operation is asynchronous.

Since: Series 60 3.1

Parameters

MXCFWTree & aTree	Target tree to construct XML from
const TDesC & aFile	File to save the XML definition to
const TDesC & aDTDFile	DTD to use for entity localization. This parameter overrides the possible DOCTYPE definition that was internalized to content tree when it was loaded from XML.

TextDetailsL(TPtrC &, TBool &)

IMPORT_C void	TextDetailsL	(	TPtrC &	aText,
			TBool &	aIsLocalized
		)

From MGECOAttributeProvider . Returns node / data object text and possible localization status for the text.

Parameters

TPtrC & aText
TBool & aIsLocalized

Tree2DOMNextCycleL()

void

Tree2DOMNextCycleL

(

)

[private]

Traverses content tree and constructs XML DOM Each call to this function processes one XCFW Tree element

Since: Series 60 3.1

UnRegisterObjectFactory(CGECOObjectFactoryBase *)

IMPORT_C TInt

UnRegisterObjectFactory

(

CGECOObjectFactoryBase *

aFactory

)

Removes a factory from Engine's object factory array.

Since: Series 60 3.1

Parameters

CGECOObjectFactoryBase * aFactory

Object factory to be removed

Member Enumerations Documentation

Enum TXCFWEngineState

Enumerators

EStateIdle = 0
EStateInitializingLoad
EStateLoadingFile
EStateInitializingSave
EStateSavingFile
EStateParsing
EStateConstructingDOM

Member Data Documentation

CMDXMLComposer * iComposer

CMDXMLComposer *

iComposer

[private]

CXCFWEntityConverter * iConverter

CXCFWEntityConverter *

iConverter

[private]

MXCFWNode * iCurrentTreeNode

MXCFWNode *

iCurrentTreeNode

[private]

CMDXMLNode * iCurrentXMLNode

CMDXMLNode *

iCurrentXMLNode

[private]

HBufC * iDTD

HBufC *

iDTD

[private]

CGECODefaultObjectFactory * iDefaultFactory

CGECODefaultObjectFactory *

iDefaultFactory

[private]

RFactoryArray iFactoryList

RFactoryArray

iFactoryList

[private]

HBufC * iFile

HBufC *

iFile

[private]

RFs iFileSystem

RFs

iFileSystem

[private]

CXCFWLocalizer * iLocalizer

CXCFWLocalizer *

iLocalizer

[private]

HBufC * iNodeText

HBufC *

iNodeText

[private]

MXCFWEngineObserver * iObserver

MXCFWEngineObserver *

iObserver

[private]

CMDXMLParser * iParser

CMDXMLParser *

iParser

[private]

TXCFWEngineState iState

TXCFWEngineState

iState

[private]

TXCFWEngineState iStateByLastError

TXCFWEngineState

iStateByLastError

[private]

MXCFWTree * iTree

MXCFWTree *

iTree

[private]

CMDXMLDocument * iXMLDoc

CMDXMLDocument *

iXMLDoc

[private]