[gme-users] How to get the derived classes of one base class inthe<<connection>>

[Zoltan Molnar]

The 
BaseType bt=DataLink->getSrc();
Int myInt(bt);
form should 'work'. 
At least this is the usual way of downcasting an element to its derived
type.

Could it happen that bt is actually not an Int but a Float?
Float myF( bt);
if( myF)
{
	// success
}


Zoli

> -----Original Message-----
> From: gme-users-bounces at list.isis.vanderbilt.edu
> [mailto:gme-users-bounces at list.isis.vanderbilt.edu] On Behalf Of ???
> Sent: Friday, June 23, 2006 9:27 AM
> To: gme-users
> Subject: [gme-users] How to get the derived classes of one 
> base class in the<<connection>>
> 
> 
> hi,all
> 
>    I meet with a problem.In my meta-model, one <<connection>> 
> called "DataLink" connects two Ends,the src is an abstract 
> <<Atom>> called "BaseType", the dst is an <<atom>> called 
> EditBox. two <<atom>>s  called "Float" and "Int" inherit "BaseType".
> 
> 
> In my user-model,a true Int <<Atom>> connects a EditBox by a 
> "DataLink" line.When developing interpreter,I want to get the 
> Int class instead of BaseType class.But I only find the 
> following  method:
> 
> BaseType  DataLinkImpl::getSrc()
> {
>     BON::ConnectionEnd ce = ConnectionImpl::getSrc();
> 	BaseType sp( ce);
> 	if ( sp)
> 		return sp;
> 
> 	BaseType empty;
> 	return empty;  
> }
> 
> 
> I try to translate base class "BastType" into "Int" or 
> "Float" class by dynamic_cast<>, I failed. 
> 
> BaseType bt=DataLink->getSrc();
> Int myInt(bt);
> 
> failed again.
> 
> help me!!    thanks!
> 
> 
> Z.G.Shu
> 
>   Ph.D Candidate
>   College of Automation Engineering, South China University 
> of Technology, 
>   Guangzhou, China.
>   Phone: +86-20-87114637
>   Email: zgshu2004 at 163.com
> 
> 
> 
> 
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