[Advanced-java] CLONE

[Pollard@xxxxxxxxx (Pollard, Jim)]

can you use instanceof to tell if something implements the Cloneable
interface?  can't find anything saying that you can in the spec, so i guess
you cannot.

if not, you can cast the Message to Object, call clone() and then catch any
CloneNotSupportedException.  or add to the interface a method called
cloneMessage() that the implementing objects must route to their own clone()
methods or else respond with a CloneNotSupportedException.

> -----Original Message-----
> From: Greg Munt [mailto:greg@xxxxxxxxxxxxxxx]
> Sent: Tuesday, January 29, 2002 11:04 AM
> To: advanced-java@xxxxxxxxxxxxxxxx; David Rosenstrauch
> Subject: Re: [Advanced-java] CLONE
> 
> 
> Erk.
> 
> What if the type of the class varies at different times 
> during execution of
> the program?
> 
> Try using reflection to see if the clone method is there, or 
> if the object
> implements Cloneable. Or make Message an extension of Cloneable.
> 
> ----- Original Message -----
> From: "David Rosenstrauch" <darose@xxxxxxx>
> To: <advanced-java@xxxxxxxxxxxxxxxx>
> Sent: Tuesday, January 29, 2002 4:18 PM
> Subject: Re: [Advanced-java] CLONE
> 
> 
> > Do a System.out.println(msg.getClass()) to find out what 
> actual sub-class
> the object is.  See if that class supports clone.  If it 
> does, then cast msg
> to the subclass type and call clone on it.
> >
> >
> > DR
> >
> >
> > At 02:52 AM 1/29/02 -0800, diya prakash wrote:
> > >Hello,
> > >
> > >I have what seems like a simple java question!!!!
> > >
> > >I have an interface Message and i have something like
> > >
> > >Message msg;
> > >
> > >I need to clone this msg variable!!!! I dont know how
> > >to acheive this as msg is not an object.
> > >
> > >Kindly help me.
> > >thank you,
> > >Ramya
> >
> > _______________________________________________
> > Advanced-java mailing list
> > Advanced-java@xxxxxxxxxxxxxxxxxxxxxx
> > http://lists.xcf.berkeley.edu/mailman/listinfo/advanced-java
> >
> 
> 
> _______________________________________________
> Advanced-java mailing list
> Advanced-java@xxxxxxxxxxxxxxxxxxxxxx
> http://lists.xcf.berkeley.edu/mailman/listinfo/advanced-java
>