General OO Question

From: Wallace Highsmith (wallyh010_at_adelphia.net)
Date: 10/30/04 

Date: Sat, 30 Oct 2004 16:43:46 -0400

What is a pattern for copying several objects in a cyclic relationship?

DrawObject has a list of connections
each connection has a line and its drawobject
each line has a connection on each end.

(drawobject) 1----* (connection) 2-----1 (line)

line has connection1 and connection2

Copying a drawobject, copies each connection
Copying each connection, copies a line
Copying the line, copies connection1 and connection2
Copying connection1 and connection2, copies drawObject
so i'm back where i started.

What is the best way to get out of this cyclic copy?

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