From mtheroux@ccs.neu.edu Wed Feb 26 11:38:44 1997
Sender: mtheroux@ccs.neu.edu
From: Michael Theroux <mtheroux@ccs.neu.edu>
To: lieber@ccs.neu.edu
Subject: Law of Demeter Violation

Would this violate the law of demeter:

this.get_giv().get_argClassList().elementAt( i )

The .elementAt( i ) may violate it, however, that is not something we
setup in our class dictionary.

				Thanks,
					-Mike-

From lieber@ccs.neu.edu Wed Feb 26 11:59:31 1997
Mike:

the Law of Demeter is not about class dictionaries, just about OO.

Yes, this would violate the Law of Demeter, so simply mark it:
// violation of LoD

When your propagation pattern tool is complete, it will be easy
to remove such violations.

Also you could argue, that the Vector class will not change
and therefore the violation is ok.

-- Karl


From dougo@ccs.neu.edu Wed Feb 26 12:54:18 1997
To: lieber@ccs.neu.edu
cc: mtheroux@ccs.neu.edu, com1205@ccs.neu.edu
Subject: Re:  Law of Demeter Violation

 > 	Would this violate the law of demeter:
 > 
 > 	this.get_giv().get_argClassList().elementAt( i )
 > 
 > Yes, this would violate the Law of Demeter, so simply mark it:
 > // violation of LoD

I prefer to write expressions like this as:

    giv.get_argClassList().elementAt( i )

This seems not to violate the spirit of the LoD, because "giv" can be
thought of as a local variable.  Also, if argClassList were instead an
array of Object, you could just write it as:

    giv.get_argClassList()[i]

which would (I think) comply with the LoD.

--Doug