Managing Software Development CSG 110
Spring 2005
Karl Lieberherr				Due date: January 13, 2005

Homework 1: Multi-Dimensional Separation of Concerns
====================================================

Read chapters 1 through 3 and 7 in the text book.
This homework is about chapter 3.

Install DemeterJ, DJ, AspectJ and DAJ on your computer.

For installation of DJ and DemeterJ.
http://www.ccs.neu.edu/research/demeter/software/docs/install.html

DJ information:
http://www.ccs.neu.edu/research/demeter/DJ/

DemeterJ information:
http://www.ccs.neu.edu/research/demeter/DemeterJava/
http://www.ccs.neu.edu/research/demeter/DemeterJava/UserManual/

For installation of AspectJ.
http://www.ccs.neu.edu/home/lieber/courses/csg110/sp05/CCS_AspectJ_Usage.html

For installation of DAJ.
http://www.ccs.neu.edu/home/lieber/courses/csg110/sp05/DAJ_Usage.html

DAJ information:
http://www.ccs.neu.edu/research/demeter/DAJ/

In this homework we practice multi-dimensional seperation of concerns
in three styles:

Part 1: Multi-Dimensional Separation of Concerns with Java, DemeterJ and DJ 
==============================================================================
Directory: expr/demeterj-dj

We use DemeterJ to simulate open classes and as a generator of code for 
generic concerns parameterized by a class dictionary (e.g., Parsing, Printing,
Displaying, etc.).
We use DJ for application-specific concerns.

Part 2: Multi-Dimensional Separation of Concerns with AspectJ, DAJ and DJ 
=========================================================================
Directory: expr/daj-dj

We use AspectJ to simulate open classes (using intertype declarations).
We use DAJ as a generator of code for generic concerns parameterized 
by a class dictionary (currently only Parsing).
We use DJ for application-specific concerns.
Traversals are interpreted.

Part 3: Multi-Dimensional Separation of Concerns with AspectJ and DAJ 
=====================================================================
Directory: expr/daj

We use AspectJ to simulate open classes (using intertype declarations).
We use DAJ as a generator of code for generic concerns parameterized 
by a class dictionary (currently only Parsing).
We use DAJ (strategy and traversal declarations in 
*.trv files) for application-specific concerns.
Traversals are compiled.

For all three parts the expr/*/gen subdirectory contains the generated
Java or AspectJ code. This code is for illustration only:
you should not modify this code. Instead you modify the files in
the super directory of the /gen directory.

For all three parts, your task is to implement the following semantic
checking concern as a hyperslice: 

For each Compound-object where the operator 
is a unary operator, there must be exactly one argument.

For each Compound-object where the operator 
is a n-ary operator, there must be two or more arguments.

The task is to write a small amount of mostly Java code.

Put your hyperslice into the following files:

expr/daj-dj 
file: CheckAspectUsingDJ.java

expr/daj 
files: SemanticChecking.trv and SemanticCheckingVisitor.java

demeterj-dj
file: program.beh

For parts 1 to 3 turn in your modified files.

Part 4: 
In expr/demeterj-dj multiple hyperslices (besides the semantic
checking hyperslice) are implemented.
Give a precise definition of each hyperslice covered in
program.beh and program.cd. What is the "kernel"
hyperslice mentioned on page 47?

You have multiple ways of finding information
about the hyperslices:

1. Inspecting the DemeterJ documentation.

2. Inspecting the Java source code in /gen. For example, DisplayVisitor.java.

3. Running the program using "demeterj test".

In expr/daj there is no display hyperslice but the kernel hyperslice
and the syntax checking (parsing) hyperslice are present.
Which files contain the AspectJ code for the parsing hyperslice?
Which file contains the specification of the parser?

Part 5:
Discuss how hyperslices help or hinder software development.
Do they promote parallel software development: can multiple
developers work simultaneously? How does this affect 
the management task? Should the unit of responsibility
for a programmer be a concern or a class?


Homework submission is electronic and hardcopy submission.
This will allow the teaching assistant
to run your programs and mark your printed copies.

Please turn in your answers in hardcopy at one of the 
following places:

(1) Bring it to the class room and hand it to me.
(2) In 202 WVH : Put it into the teaching assistant's mailbox. 
(3) In 202 WVH : Put it into my mailbox. 
(4) If all those possibilities don't work for you, 
      slide it under my office door.

For electronic submission to Blackboard, the format for files should be:

hw?_[lastname].[ext]

lastname = your last name
ext = zip, doc, ps, pdf, tar.gz, tgz