Class CSdpAttrValue

class CSdpAttrValue : public CBase;

Description

Base class for classes that encapsulate SDP attributes values.

Sub-classes of this wrap specific types of SDP service record attributes. For example, CSdpBoolean derives from CSdpAttrValue to encapsulate boolean attributes. The base class defines getters for all types: for example, it declares a function Bool() that returns the attribute value as a TBool. Note though that the function would panic unless called on actual CSdpBoolean.

A common base class allows attributes of all types to be used polymorphically. You can use CSdpAttrValue's Type() function to find the actual type being used, and upcast the pointer appropriately.

Derivation

• CBase - Base class for all classes to be instantiated on the heap

• CSdpAttrValue - Base class for classes that encapsulate SDP attributes values

Members

Defined in CSdpAttrValue:
AcceptVisitorL(), Bool(), DataSize(), Des(), DoesIntFit(), Int(), Type(), UUID(), Uint(), ~CSdpAttrValue()

Inherited from CBase:
Delete(), Extension_(), operator new()

virtual ~CSdpAttrValue();

Description

Destructor.

virtual TSdpElementType Type() const=0;

Description

Gets the attribute type.

Return value

TSdpElementType Attribute type

virtual TUint DataSize() const=0;

Description

Gets the size of the attribute.

Return value

TUint Size of the attribute in bytes

virtual TUint Uint() const;

Description

Gets an unsigned integer attribute value.

The base class implementation panics.

Return value

TUint Attribute value

virtual TInt Int() const;

Description

Gets a signed integer attribute value.

The base class implementation panics.

Return value

TInt Attribute value

virtual TBool DoesIntFit() const;

Description

Tests if the attribute can be stored in an integer value.

The base class implementation returns EFalse.

Return value

TBool True if the attribute can be stored in an integer value

virtual TInt Bool() const;

Description

Gets a Boolean attribute value.

The base class implementation panics.

Return value

TInt Attribute value

virtual const TUUID &UUID() const;

Description

Gets a UUID attribute value.

The base class implementation panics.

Return value

const TUUID & Attribute value

virtual const TPtrC8 Des() const;

Description

Gets a data buffer attribute value.

The base class implementation panics.

Return value

const TPtrC8 Attribute value

virtual void AcceptVisitorL(MSdpAttributeValueVisitor &aVisitor);

Description

Request a call back to pass the attribute value.

When called on attributes that are not lists (not DEA or DES), then this calls MSdpAttributeValueVisitor::VisitAttributeValueL(), passing the attribute value object itself (i.e. *this), and the value attribute type.

It is more useful when called on a DES or DEA object, as it then provides a simple method of enumerating each attribute in a list.

Parameters

MSdpAttributeValueVisitor &aVisitor Abstract interface that can be implemented to receive an enumeration of the values in an attribute list.

See also:

• CSdpAttrValueList::AcceptVisitorL()
• MSdpAttributeValueVisitor::VisitAttributeValueL()