On Thu, 24 Aug 2006 16:24:09 -0500, Guyren Howe <[EMAIL PROTECTED]> wrote:
On Aug 24, 2006, at 3:10 PM, Alexander Cohen wrote:
Does anyone know of any code hacks that would allow a developer to
instantiate a custom class from within the IDE by name?
example:
dim instance as Object = NewInstanceOfObjectByName("MyCustomClass")
This is an example of something you could implement elegantly with
"first class classes" (classes that are themselves objects). If you
are interested in this capability, sign on to <http://
www.realsoftware.com/feedback/viewreport.php?reportid=ngrccqde>.
Until then, your simplest solution is a dirty big case statement.
Sorry, but IMHO the simplest solution is a "class-factory"
Define a dictionary e.g. in the App (or better some where else, so
your code is protable between Applications) and add the classes
during start up
ClassFactory.Value("myName") = new myNameClass
What I suggest is a method "ObjectClassName" for all this classes, so
you're able to retrieve the name of the class of a given object
during runtime.
Of course you can extend this in a lot of varieties, but the basic is
use a class-factory.
Btw. for all "this is possible in ...."-criers, e.g. for "Java" of
course you can create classes on the fly dynamically while the
applications are running, but in average these classes are way slower
then a default defined and create class in source code. For some
"minor" classes this may not count for real-world-usage, but some
years ago we had to refactor a very big application completely to
speed it up from unusable to fast! So even in environments where
you're able to create classes dynamically it makes sense to know
about the class factory.
ciao
Thorsten Hohage
--
that-Office.de Softwaredesign - Hamburg,Germany
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