Tools.h++ Class Reference

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©Copyright 1996 Rogue Wave Software
RWFactory
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Synopsis
typedef unsigned short RWClassID;
typedef RWCollectable* (*RWuserCreator)();
#include <rw/factory.h>
RWFactory* theFactory;
Description
Class RWFactory can create an instance of an RWCollectable object, given a class ID. It does
this by maintaining a table of class IDs and associated "creator functions." A creator function
has prototype:
RWCollectable* aCreatorFunction();
This function should create an instance of a particular class. For a given RWClassID tag, the
appropriate function is selected, invoked and the resultant pointer returned. Because any object
created this way is created off the heap, you are responsible for deleting it when done.
There is a one-of-a-kind global RWFactory which can be accessed using getRWFactory. It is
guaranteed to have creator functions in it for all of the classes referenced by your program. See
also the section in the User's Guide about RWFactory.