README
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Created by Javier Sanchez 01-24-15
An Example of Object-Oriented Design

TO RUN
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Compile all .java files and run the Driver.java class.

CODING PROBLEM
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See GenericCodingProblem.pdf file

PROGRAM DESCRIPTION
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This program creates an input of shopping Items with characteristics
and calculates taxes on the items, total tax paid, and grand total.

Items can be taxed at higher rates if imported.
Items can exempt from sales tax (and any other tax for that matter).
Items can be taxed with multiple types of taxes.

IMPLEMENTATION NOTES
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I centered the  focus of the program around the Taxing of Items.
By using Object-Oriented Design Patterns, I created a program
where new Taxes can be added easily into the program by way
of the Decorator pattern.

Description of Implementation Design:

Items - carry characteristics and new Items can be instantiated
Orders - carry multiple Items and are responsible for reporting Taxes
Tax Calculator - responsible for traversing Items and adding corresponding Tax to Item price
Tax Decorator Classes - responsible for adding Tax rates to Items by wrapping Items

Of course, more features such as a Parser of File input can be made to
instantiate Item instances, but I kept the focus on OO design.

I wanted to keep the implementation as simple as I could, but some areas of 
improvement that can be made would be to create Exempt Item Classes instead of
enumerating (Yuck) exempt types. The Order class could also be broken up into a
larger hierarchy, but, that would be overkill for this problem :)