[jdev] which are the files those handles the chat contents

[sameer agrawal]

hello
i am using the jabber as a server.and the buddyspace as a client.
i want to know only those files which are responsible for handling the chat contents coming from the client side.there is a number of files 
in the jabber source code and i am unable to find those ones which are responsible to handle chat contents.please
help me.
thanks
sameer agrawal