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The process of externalising an object involves externalising its data to a stream.
For a class instance, this involves externalising each of its data
members and components to a stream. This process is encapsulated by the
ExternalizeL()
member function of the class.
A class always defines ExternalizeL()
as:
void ExternalizeL(RWriteStream& aStream) const;
and uses the write stream interface class RWriteStream
.
Note that ExternalizeL()
is not virtual and there is no
implication that a class that requires an ExternalizeL()
function
must be derived from any particular base class.