Re: Factories, handles, and handle wrappers

From:

Flaamwing <jp@jpostmus.com>

Newsgroups:

comp.lang.c++.moderated,comp.lang.c++

Date:

Thu, 17 Dec 2009 23:47:26 CST

Message-ID:

<18e1fda5-92c7-41e5-a286-8aa2f896db23@j14g2000yqm.googlegroups.com>

// In some function, somewhere
OBJHANDLE objHandle = factoryObj.CreateObject();
factoryObj.OperateOnObject(objHandle, 42);
factoryObj.DestroyObject(objHandle);

Technically, wouldn't this be

OBJHANDLEWRAPPER objHandleWrapper = factoryObj.CreateObject();
factoryObj.OperateOnObject(objHandleWrapper, 42);
factoryObj.DestroyObject(objHandleWrapper);

Given that, you should be able to operate directly on the wrapper
with:

objHandleWrapper.OperateOnObject(42);

Or, you could extract the handle from the wrapper and then use the
original syntax:

OBJHANDLE objHandle = objHandleWrapper.GetHandle();
factoryObj.OperateOnObject(objHandle, 42);

And obviously you could pass a pointer to the wrapper to another
function, and operate on that with:

SomeClass.SomeFunction(&objHandleWrapper);

void SomeClass::SomeFunction(OBJHANDLEWRAPPER* pObjHndWrpr)
{
     pObjHndWrpr->OperateOnObject(42);
}

Just my thoughts...
John

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