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CCFOperationNode Class Reference

class CCFOperationNode : public CBase

CCFOperationNode is an abstract base class for all Context Framework Script operations. All operations have ternary logic boolean value: ECFConditionUndefined, ECFConditionFalse, or ECFConditionTrue.

CFScriptEngine

Since: Series 60 5.0

Inherits from

CCFOperationNode
- CBase

Public Member Functions
	~CCFOperationNode()
void	ActivateL()
TInt	CheckSecurity()
IMPORT_C void	Cleanup()
void	Deactivate()
void	Evaluate()
IMPORT_C TAny *	Extension(const TUid &)
IMPORT_C void	ExternalizeL(RWriteStream &)
IMPORT_C void	InternalizeL(RReadStream &)
IMPORT_C TCFConditionValue	Value()

Protected Member Functions
	CCFOperationNode(MCFOperationServices &, CCFOperationNode *)
IMPORT_C void	GenerateDomTreeLocationInfoL(CMDXMLNode &)

Inherited Functions
	CBase::CBase()
	CBase::Delete(CBase *)
	CBase::Extension_(TUint,TAny &,TAny )
	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	TCFConditionValue { ECFConditionUndefined = -1, ECFConditionFalse = 0, ECFConditionTrue = 1 }

Protected Attributes
HBufC *	iDomTreeLocationInfo
CCFOperationNode *	iParent
MCFOperationServices &	iServices
TCFConditionValue	iValue

Constructor & Destructor Documentation

CCFOperationNode(MCFOperationServices &, CCFOperationNode *)

IMPORT_C	CCFOperationNode	(	MCFOperationServices &	aServices,
			CCFOperationNode *	aParent
		)	[protected]

C++ default constructor.

Parameters

MCFOperationServices & aServices	is the operation services interface for nodes.
CCFOperationNode * aParent	is the parent of this node, NULL if this is a root. The ownership of the parent node is not transferred.

~CCFOperationNode()

IMPORT_C

~CCFOperationNode

(

)

[virtual]

Destructor.

Member Functions Documentation

ActivateL()

void

ActivateL

(

)

[pure virtual]

Activates this node, e.g. subscribes contexts or restores values from persistent storage. Depending on the goal of the node, it should pass the activate call to its' children.

CheckSecurity()

TInt

CheckSecurity

(

)

[pure virtual]

Asks this node to check its security (via services interface). For example, the security of contexts to be subscribed or actions to be performed.

Cleanup()

IMPORT_C void

Cleanup

(

)

[virtual]

Cleanup long term resources like persistent data files. This is called by the context framework when the script is uninstalled from the system.

Deactivate()

void

Deactivate

(

)

[pure virtual]

Deactivates this node, e.g. removes subscriptions. Depending on the goal of the node, it should pass the deactivate call to its' children.

Evaluate()

void

Evaluate

(

)

[pure virtual]

Called by child node, to ask the parent to re-evaluate its value, since the child's value has changed.

Extension(const TUid &)

IMPORT_C TAny *

Extension

(

const TUid &

aUid

)

const [virtual]

Get a pointer to an extension. Every extension is identified with a particular UID.

Parameters

const TUid & aUid

Uid of the extension.

ExternalizeL(RWriteStream &)

IMPORT_C void

ExternalizeL

(

RWriteStream &

aStream

)

[virtual]

Externalizes operation.

Parameters

RWriteStream & aStream

Write stream.

GenerateDomTreeLocationInfoL(CMDXMLNode &)

IMPORT_C void

GenerateDomTreeLocationInfoL

(

CMDXMLNode &

aNode

)

[protected, virtual]

Generates DOM tree location info for this node.

Parameters

CMDXMLNode & aNode

is the DOM node based on which info is generated.

InternalizeL(RReadStream &)

IMPORT_C void

InternalizeL

(

RReadStream &

aStream

)

[virtual]

Internalizes operation.

Parameters

RReadStream & aStream

Read stream.

Value()

IMPORT_C TCFConditionValue

Value

(

)

const [virtual]

Returns the value of the node.

Member Enumerations Documentation

Enum TCFConditionValue

Condition values for script operations. False and true must match with the boolean equivalents to enable safe type casting.

Enumerators

ECFConditionUndefined = -1
ECFConditionFalse = 0
ECFConditionTrue = 1

Member Data Documentation

HBufC * iDomTreeLocationInfo

HBufC *

iDomTreeLocationInfo

[protected]

CCFOperationNode * iParent

CCFOperationNode *

iParent

[protected]

MCFOperationServices & iServices

MCFOperationServices &

iServices

[protected]

TCFConditionValue iValue

TCFConditionValue

iValue

[protected]