AggregationClass

In order to gain practical knowledge of aggregation and to practice deep copying of field objects we will implement a class called Aggregation.

Start your work with Aggregation.java class provided. There you will see all fields already set up$.$ There are also $2$ methods written in: toString$()$ and forDeepCopyTesting$().$ Do not make any changes to them.

The class has $3$ fields:

fractionField of type Fraction $($class from the first problem$)$

arrayField $$ array of Rectangles. Custom Rectangle class is provided among the assignment files.

doubleField of type double

The class does not really have any functionality and its main purpose is to give you a hands$-$on review of the aggregation concept. Class has a very limited number of methods, all of them are standard methods that you would expect to see in any regular class.

Non$-$argument constructor that sets

fractionField to fraction $0/1,$

arrayField to an array of size $1$ filled with Rectangle with both width and length set to $1$

doubleField to $0\mathrm{.}0$

Constructor that takes a fraction, an array, and a double as parameters and sets all $3$ fields to the given values. Make sure to create DEEP COPIES of all non$-$primitive parameters when setting the new object fields.

Copy constructor. Make sure to create DEEP COPIES of all non$-$primitive fields when setting the new object fields.

Three accessor methods for all $3$ fields. Make sure to create DEEP COPIES of all non$-$primitive fields and return a reference to a copy not to the original field.

Three mutator methods for all $3$ fields. Make sure to create DEEP COPIES of all non$-$primitive parameters when changing the value of the fields.

AggregationClass methods and their point values

Test Group #

Methods Tested

Point Value

$1$

No$-$argument constructor; Constructor

$10$

$2$

$3$ accessors; $3$ mutators

$10$

$3$

Copy constructor

$10$

Total

$30$