RE: [flexcoders] Determine if a Class implements an Interface

Gordon Smith Tue, 15 Aug 2006 23:38:16 -0700

I'll bet that new'ing an instance of the class and using the 'is' operator on the instance will be faster than calling describeType() on the class and checking for an <implementsInterface> tag.

- Gordon

From: [email protected] [mailto:[email protected]] On Behalf Of Matt Chotin
Sent: Tuesday, August 15, 2006 9:04 PM
To: [email protected]
Subject: RE: [flexcoders] Determine if a Class implements an Interface

describeType should be able to get you that info I think.

From: [EMAIL PROTECTED]ups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of thunderstumpgesatwork
Sent: Tuesday, August 15, 2006 5:42 PM
To: [EMAIL PROTECTED]ups.com
Subject: [flexcoders] Determine if a Class implements an Interface

Hi all,

I often use

if (obj is MyClassOrInterface)
{
// do whatever
}

but it appears that only works with Instances not Classes. With just a
Class, how can I tell if that class implements a particular interface
or is of a particular base type? Do I have to create an instance of
it and check the instance? I'm sure there must be another way...

thanks in advance,
Thunder
__________________________

var currentDomain:ApplicationDomain = ApplicationDomain.currentDomain;
var psClass:Class = null;
if (currentDomain.hasDefinition(sPropClass))
{
psClass = Class(currentDomain.getDefinition(sPropClass));
}

// below statement doesn't work!
if ( (psClass != null) && (psClass is IPropertySheet) )
{
// make a new one of these classes.
}

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RE: [flexcoders] Determine if a Class implements an Interface

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