COM3362

Homework 1: Due April 5, 1999.

The course home page is:
http://www.ccs.neu.edu/home/lieber/com3362.html

The page for this course is:
http://www.ccs.neu.edu/home/lieber/com3362/sp99/

You can also access those files at:
/home/lieber/.www/com3362/sp99/

I use the abbreviation $AOOS to refer to both:
/home/lieber/.www/com3362/sp99/
http://www.ccs.neu.edu/home/lieber/com3362/sp99/

This file is in $AOOS/hw/1/assign1.txt

Problem 1:
=============================

Purpose: Form an initial opinion about Catalysis, a new method
for component-based software development using UML notation.

Familiarize yourself with collaborations and components as they are described
in the Catalysis method.
The Catalysis method is described in:
$AOOS/readings/catalysis
The files C* are chapters of the Catalysis book.
OTo get an overview, start at: http://www.trireme.com/catalysis/book/

Familiarize yourself with collaborations and components as they are described
in the OOPSLA '98 paper my Mezini/Lieberherr.
http://www.ccs.neu.edu/research/demeter/biblio/components.html

Compare the two kinds of collaborations
and the two kinds of components.

Turn in your English text.

Problem 2:
=============================
Purpose: Get a first exposure on how to implement components in Java.

$AOOS/readings/inner-classes/Reg+Neg.java 
contains an implementation of two pricing components
(Regular Pricing and Negotiated Pricing) from the OOPSLA '98 paper.

Compile and run the program and draw a UML class diagram of the classes.

Modify the Java program to also include a definition and use of
SpecialPricing, AgingPricing and FrequentCustomerPricing
(Figure 12 in the OOPLSA paper).

Problem 3:
==============================
Purpose: Familiarize yourself with DJ, a simple tool that helps
you navigate with ease.

Modify the Java program from Problem 2 and include
the DJ library  and write one line that retrieves
all Tax-objects connected to a Quote-object.
To test your one-line gathering statement,
write some additional code to
print the salePercentage for each Tax-object.

Information about DJ is at:
http://www.ccs.neu.edu/research/demeter/DJ/
Your traversal strategy will be very simple: from Quote to Tax.