[SOLVED] Comp1210 project: bakery – part 3

Overview: This project is Part 3 of three that involves a bakery and reporting for baked items. In
Part 1, you developed Java classes that represent categories of baked items including cookies, pies,
cakes, and wedding cakes. In Part 2, you implemented additional classes: (1) PriceComparator,
which implements the Comparator interface to compare baked items by price; (2) FlavorComparator,
which implements the Comparator interface to compare baked items by flavor; (3) BakeryItemList,
Project: Bakery – Part 3 Page 2 of 7
Page 2 of 7 which represents a list of baked items and includes several specialized methods. In Part 3, you are to
add exception handling. You will need to do the following: (1) create a new class named
InvalidCategoryException which extends the Exception class, (2) add try-catch statements to catch a
FileNotFoundException in the main method of the BakeryPart3 class, and (3) modify the
readItemFile method in the BakedItemList class to catch/handle the InvalidCategoryException,
NumberFormatException, and NoSuchElementException in the event that one or more of these
exceptions are thrown while reading the input file.
Note that the main method in BakeryPart3 should create a BakedItemList object and then invoke the
readItemFile method on that BakedItemList object to read data from a file and add baked items to the
list. You can use BakeryPart3 in conjunction with interactions by running the program in the canvas
(or debugger with a breakpoint) and single stepping until the variables of interest are created. You
can then enter interactions in the usual way. In addition to the source files, you will create a JUnit
test file for the indicated source files and write one or more test methods to ensure the classes and
methods meet the specifications. You should create a jGRASP project upfront and then add the
source files as they are created. All of your files should be in a single folder.
• Cookie, Pie, Cake, and WeddingCake
Requirements and Design: No changes from the specifications in Bakery – Part 1.
• PriceComparator and FlavorComparator
Requirements and Design: No changes from the specifications in Bakery – Part 2.
• InvalidCategoryException.java
Requirements and Design: InvalidCategoryException is a user defined exception created by
extending the Exception class. This exception is to be thrown and caught in the readItemFile
method in the BakedItemList class when a line of input data contains an invalid baked item
category. The constructor for InvalidCategoryException takes a single String parameter
representing category and invokes the super constructor with the following String:
“For category: ” + “”” + category + “””
This string will be the toString() value of an InvalidCategoryException when it occurs. For a
similar constructor, see InvalidLengthException.java in ExamplesPolygons from the class notes
on Exceptions.
• BakedItemList.java
Requirements and Design: The BakedItemList class provides methods for reading in the data
file and generating reports.
Design: In addition to the specifications in Bakery – Part 2, the existing readItemFile method
must be modified to catch the following: InvalidCategoryException, NumberFormatException,
and NoSuchElementException.
Project: Bakery – Part 3 Page 3 of 7
Page 3 of 7 o readItemFile has no return value and accepts the data file name as a String. Remember
to include the throws FileNotFoundException clause in the method declaration.
This method creates a Scanner object to read in the file, and then reads the file line by line.
The first line contains the BakedItemList name and each of the remaining lines contains the
data for a baked item. After reading in the list name, the “baked item” lines should be
processed as follows. A baked item line is read in, a second scanner is created on the line,
and the individual values for the baked item are read in. After the values on the line have
been read in, an “appropriate” BakedItem object is created. The data file is a “comma
separated values” file; i.e., if a line contains multiple values, the values are delimited by
commas. So when you set up the scanner for the baked item lines, you need to set the
delimiter to use a “,” by calling the useDelimiter(“,”) method on the Scanner object.
Each baked item line in the file begins with a category for the baked item (C, P, K, and W are
valid categories for baked items indicating Cookie, Pie, K for Cake, and WeddingCake
respectively). The second field in the record is the name, followed by flavor, and quantity.
The next field(s) may correspond, as appropriate, to the data needed for the particular
category (or subclass) of BakedItem (e.g., a Pie has a crustCost and a Cake has layers). The
last fields are the ingredients, which should be stored in an array (new String[50]) as they are
read in. After all ingredients have been read in, use the java.util.Arrays copyOf method make
a new ingredients array with length equal to the number of ingredients. If the line/record has a
valid category and it has been successfully read in, the appropriate BakedItem object should
be created and added to itemList. For each incorrect line scanned (i.e., a line of data
contains an invalid category, invalid numeric data, or missing data), your method will need to
handle the invalid items properly.
o If the line of data begins with an invalid category, your program should throw an
InvalidCategoryException (see description above). The code that adds a record with
an invalid baked item category to the excluded records array should be placed in the
catch block for InvalidCategoryException.
o If a line of data has a valid category, but includes invalid numeric data (e.g., the value
for quantity contains an alphabetic character), a NumberFormatException (see notes
on last page) will be thrown automatically by the Java Runtime Environment (JRE).
o If a line of data has a valid category but has missing data, a
java.util.NoSuchElementException will be thrown automatically by the JRE.
The code in the while loop that reads in the baked item records and checks for baked item
category should be in a try statement followed by three catch blocks: one for each of
InvalidCategoryException, NumberFormatException, and NoSuchElementException (fully
qualify as java.util.NoSuchElementException or include import statement). In each catch
block, a String object should be created consisting of
“*** ” + e + ” in:
” + line
where e is the exception and line is the record with the invalid data. The String object should
be added to the excludedRecords array.
The file baked_item_data2.csv is available for download from the course web site.
Below are example data records (the first line/record containing the baked item list name is
Project: Bakery – Part 3 Page 4 of 7
Page 4 of 7 followed by baked item lines/records). Note that five of these baked item records will cause
an exception to be thrown. These are listed in the “Excluded Records Report” on page 6.
Auburn’s Best Bakery
C,Chips Delight,Chocolate Chip,12,flour,sugar,dark chocolate chips,butter,baking soda,salt
D,Chips Delight,Chocolate Chip,12,flour,sugar,dark chocolate chips,butter,baking soda,salt
P,Weekly Special,Apple,1,0,flour,sugar,apple,cinnamon,butter,baking soda,salt
P,Daily Special,Pecan,1.0,0,flour,sugar,pecans,dark corn syrup,butter,baking soda,salt
R,Weekly Special,Apple,1,0,flour,sugar,apple,cinnamon,butter,baking soda,salt
P,Summer Special,Key Lime,1,2.0,flour,sugar,lime juice,lemon juice,graham crackers,butter,baking soda,salt
K,Birthday,Chocolate,1,1,flour,sugar,cocoa powder,vanilla,eggs,butter,baking soda,baking powder,salt
K,2-Layer,Red Velvet,1,2,flour,sugar,cocoa powder,food coloring,eggs,butter,baking soda,baking powder,salt
K,2-Layer,Chocolate,1,two,flour,sugar,cocoa powder,eggs,butter,baking soda,baking powder,salt
W,3-Layer/3-Tier,Buttermilk,1,3
W,3-Layer/3-Tier,Vanilla,1,3,3,flour,sugar,buttermilk,coffee,eggs,butter,baking soda,baking powder,salt
BakeryPart3.java
Requirements and Design: The BakeryPart3 class has only a main method as described below.
In addition to the specifications in Bakery – Part 2, the main method should be modified to catch
and handle an FileNotFoundException if one is thrown in the readItemFile method.
o As before, the main method reads in the file name as the first argument, args[0], of the
command line arguments, creates an instance of BakedItemList, and then calls the
readItemFile method in the BakedItemList class to read in the data file and generate the five
reports as shown in the output examples beginning on the next page. The main method
should not include the throws FileNotFoundException in the declaration. Instead, the main
method should include a try-catch statement to catch FileNotFoundException when/if it is
thrown in the readItemFile method in the BakedItemList class. This exception is most likely
to occur when an incorrect file name is passed to the readItemFile method. After this
exception is caught and the appropriate message is printed in the main method, your program
should end. See the second example output below.
Example data files can be downloaded from the Lab web page, and the program output for
baked_item_data2.csv begins on the next page.
Example Output when file name is missing as command line argument —-jGRASP exec: java BakeryPart3
File name expected as command line argument.
Program ending.
—-jGRASP: operation complete.
Example Output when attempting to read a file that is not found
(fake_data.csv) —-jGRASP exec: java BakeryPart3 fake_data.csv
Attempted to read file: fake_data.csv (No such file or directory)
Program ending.
—-jGRASP: operation complete.
Project: Bakery – Part 3 Page 5 of 7
Page 5 of 7 Example Output for baked_item _data2.csv
—-jGRASP exec: java BakeryPart3 baked_item_data2.csv
—————————————
Report for Auburn’s Best Bakery
—————————————
Cookie: Chips Delight – Chocolate Chip Quantity: 12 Price: $4.20
(Ingredients: flour, sugar, dark chocolate chips, butter, baking soda,
salt)
Pie: Weekly Special – Apple Quantity: 1 Price: $12.00
(Ingredients: flour, sugar, apple, cinnamon, butter,
baking soda, salt)
Pie: Summer Special – Key Lime Quantity: 1 Price: $14.00
(Ingredients: flour, sugar, lime juice, lemon juice, graham crackers,
butter, baking soda, salt)
Cake: Birthday – Chocolate Quantity: 1 Price: $8.00
(Ingredients: flour, sugar, cocoa powder, vanilla, eggs,
butter, baking soda, baking powder, salt)
Cake: 2-Layer – Red Velvet Quantity: 1 Price: $16.00
(Ingredients: flour, sugar, cocoa powder, food coloring, eggs,
butter, baking soda, baking powder, salt)
WeddingCake: 3-Layer/3-Tier – Vanilla Quantity: 1 Price: $135.00
(Ingredients: flour, sugar, buttermilk, coffee, eggs,
butter, baking soda, baking powder, salt)
—————————————
Report for Auburn’s Best Bakery (by Class)
—————————————
Cake: 2-Layer – Red Velvet Quantity: 1 Price: $16.00
(Ingredients: flour, sugar, cocoa powder, food coloring, eggs,
butter, baking soda, baking powder, salt)
Cake: Birthday – Chocolate Quantity: 1 Price: $8.00
(Ingredients: flour, sugar, cocoa powder, vanilla, eggs,
butter, baking soda, baking powder, salt)
Cookie: Chips Delight – Chocolate Chip Quantity: 12 Price: $4.20
(Ingredients: flour, sugar, dark chocolate chips, butter, baking soda,
salt)
Pie: Summer Special – Key Lime Quantity: 1 Price: $14.00
(Ingredients: flour, sugar, lime juice, lemon juice, graham crackers,
butter, baking soda, salt)
Pie: Weekly Special – Apple Quantity: 1 Price: $12.00
(Ingredients: flour, sugar, apple, cinnamon, butter,
baking soda, salt)
WeddingCake: 3-Layer/3-Tier – Vanilla Quantity: 1 Price: $135.00
(Ingredients: flour, sugar, buttermilk, coffee, eggs,
butter, baking soda, baking powder, salt)
—————————————
Report for Auburn’s Best Bakery (by Price)
—————————————
Cookie: Chips Delight – Chocolate Chip Quantity: 12 Price: $4.20
(Ingredients: flour, sugar, dark chocolate chips, butter, baking soda,
salt)
Project: Bakery – Part 3 Page 6 of 7
Page 6 of 7 Cake: Birthday – Chocolate Quantity: 1 Price: $8.00
(Ingredients: flour, sugar, cocoa powder, vanilla, eggs,
butter, baking soda, baking powder, salt)
Pie: Weekly Special – Apple Quantity: 1 Price: $12.00
(Ingredients: flour, sugar, apple, cinnamon, butter,
baking soda, salt)
Pie: Summer Special – Key Lime Quantity: 1 Price: $14.00
(Ingredients: flour, sugar, lime juice, lemon juice, graham crackers,
butter, baking soda, salt)
Cake: 2-Layer – Red Velvet Quantity: 1 Price: $16.00
(Ingredients: flour, sugar, cocoa powder, food coloring, eggs,
butter, baking soda, baking powder, salt)
WeddingCake: 3-Layer/3-Tier – Vanilla Quantity: 1 Price: $135.00
(Ingredients: flour, sugar, buttermilk, coffee, eggs,
butter, baking soda, baking powder, salt)
—————————————
Report for Auburn’s Best Bakery (by Flavor)
—————————————
Pie: Weekly Special – Apple Quantity: 1 Price: $12.00
(Ingredients: flour, sugar, apple, cinnamon, butter,
baking soda, salt)
Cake: Birthday – Chocolate Quantity: 1 Price: $8.00
(Ingredients: flour, sugar, cocoa powder, vanilla, eggs,
butter, baking soda, baking powder, salt)
Cookie: Chips Delight – Chocolate Chip Quantity: 12 Price: $4.20
(Ingredients: flour, sugar, dark chocolate chips, butter, baking soda,
salt)
Pie: Summer Special – Key Lime Quantity: 1 Price: $14.00
(Ingredients: flour, sugar, lime juice, lemon juice, graham crackers,
butter, baking soda, salt)
Cake: 2-Layer – Red Velvet Quantity: 1 Price: $16.00
(Ingredients: flour, sugar, cocoa powder, food coloring, eggs,
butter, baking soda, baking powder, salt)
WeddingCake: 3-Layer/3-Tier – Vanilla Quantity: 1 Price: $135.00
(Ingredients: flour, sugar, buttermilk, coffee, eggs,
butter, baking soda, baking powder, salt)
—————————————
Excluded Records Report
—————————————
*** InvalidCategoryException: For category: “D” in:
D,Chips Delight,Chocolate Chip,12,flour,sugar,dark chocolate chips,butter,baking soda,salt
*** java.lang.NumberFormatException: For input string: “1.0” in:
P,Daily Special,Pecan,1.0,0,flour,sugar,pecans,dark corn syrup,butter,baking soda,salt
*** InvalidCategoryException: For category: “R” in:
R,Weekly Special,Apple,1,0,flour,sugar,apple,cinnamon,butter,baking soda,salt
*** java.lang.NumberFormatException: For input string: “two” in:
K,2-Layer,Chocolate,1,two,flour,sugar,cocoa powder,eggs,butter,baking soda,baking powder,salt
*** java.util.NoSuchElementException in:
W,3-Layer/3-Tier,Buttermilk,1,3
—-jGRASP: operation complete.
Project: Bakery – Part 3 Page 7 of 7
Page 7 of 7 Notes:
1. This project assumes that you are reading each double or int value as String using next() and then
parsing it into a double with Double.parseDouble(…) or into an int with Integer.parseInt(…) as shown
in the following examples.
. . . Double.parseDouble(myInput.next());
. . . Integer.parseInt(myInput.next());
This form of input will throw a java.lang.NumberFormatException if the value is not a double.
If you are reading in each double value as a double using nextDouble(), for example
. . . myInput.nextDouble();
then a java.util.InputMismatchException will be thrown if the value read is not a double.
For this project, you must use Double.parseDouble(…) or Integer.parseInt(…) to input a double or int
value respectively since Web-CAT is expecting NumberFormatException when an input String
cannot be converted to double or int value.
2. In the readItemFile method, for the default case (or else), which detects an invalid category, the only
statement should be:
throw new InvalidCategoryException(category);
The code that was in this block in Part 2 should be moved to the catch block for
InvalidCategoryException with any changes specified for Part 3.