Class TUidType

class TUidType;

Description

Encapsulates a set of three unique identifiers (UIDs) which, in combination, identify a system object such as a GUI application or a DLL. The three component UIDs are referred to as UID1, UID2 and UID3.

An object of this type is referred to as a compound identifier or a UID type.

Members

Defined in TUidType:

• IsPresent(TUid)constTests if any of the component UIDs are equal to the specified UID.
• IsValid()constTests the object for a valid (non-KNullUid) UID type.
• MostDerived()constGets the most derived UID.
• TUidType()Default constructor.
• TUidType(TUid)Constructor that creates a UID type and sets the UID1 component to the specified...
• TUidType(TUid,TUid)Constructor that creates a UID type and sets the UID1 and UID2 components to the...
• TUidType(TUid,TUid,TUid)Constructor that creates a UID type and sets all three UID components to the spe...
• operator!=(const TUidType &)constCompares this UID type for inequality with the specified UID type.
• operator==(const TUidType &)constCompares this UID type for equality with the specified UID type.
• operator[](TInt)constGets the UID component as identified by the specified index.

IMPORT_C TUidType();

Description

Default constructor.

Creates a UID type, and sets all three component UIDs to KNullUid.

IMPORT_C TUidType(TUid aUid1);

Description

Constructor that creates a UID type and sets the UID1 component to the specified value.

The UID2 and UID3 components are set to KNullUid.

Parameters

IMPORT_C TUidType(TUid aUid1, TUid aUid2);

Description

Constructor that creates a UID type and sets the UID1 and UID2 components to the specified values.

The UID3 component is set to KNullUid.

Parameters

IMPORT_C TUidType(TUid aUid1, TUid aUid2, TUid aUid3);

Description

Constructor that creates a UID type and sets all three UID components to the specified values.

Parameters

IMPORT_C TBool operator==(const TUidType &aUidType) const;

Description

Compares this UID type for equality with the specified UID type.

Parameters

Return value

IMPORT_C TBool operator!=(const TUidType &aUidType) const;

Description

Compares this UID type for inequality with the specified UID type.

Parameters

Return value

IMPORT_C const TUid& operator[](TInt anIndex) const;

Description

Gets the UID component as identified by the specified index.

Parameters

Return value

Panic codes

IMPORT_C TUid MostDerived() const;

Description

Gets the most derived UID.

Taking the three UID components as a hierarchy with UID1 being the most general, UID2 being more specific than UID1 and UID3 being more specific than UID2, then the function returns:

UID3, if UID3 is not KNullUid.

UID2, if UID2 is not KNullUid.

UID1, otherwise

Return value

IMPORT_C TBool IsPresent(TUid aUid) const;

Description

Tests if any of the component UIDs are equal to the specified UID.

Parameters

Return value

IMPORT_C TBool IsValid() const;

Description

Tests the object for a valid (non-KNullUid) UID type.

Return value