User Account

All Pages

factory method, Software Engineering

Assignment Help:
For this assignment you will create a program called MMWordFix (Multi-Mode WordFix). This program prompts the user to select one of three word filters (uppercase, lowercase, encrypt). Then it allows the user to repeatedly apply this filter either interactively or to convert a file. Here is a sample run:


If the user tries to convert a file and the file is not found in the local directory, they should see an error message, e.g.:


If the user does not correctly enter the name of one of the filters, WordFix should continue to prompt the user until a valid selection is entered. For example,



This program builds on Hwk4.
IFilter, FUpperCase, FLowerCase, FEncrypt:
• No changes.
FilterMgr:
• Change method selectFilter to return a pointer to IFactory. Thus it creates and returns an instance of the appropriate factory (instead of filter).
IFactory:
• An interface that has method NewFilter, which takes no arguments and returns a pointer to an IFilter.
UCaseFactory, LCaseFactory, EncryptFactory:
• Each implements interface IFactory.
• Each creates a different type of filter object: FUpperCase, FLowerCase, or FEncrypt respectively.
InteractiveFix:
• Has private attribute myFilter, which is a pointer to an IFilter.
• The constructor takes a pointer to an IFactory as an argument. It uses the factory object to create a filter object, which it saves in myFilter.
• Has method DoInteractiveSession, which takes no arguments and returns nothing. This method:
o Prompts the user for a word, then accepts a word from the user.
o If the word is “q”, the method returns.
o Otherwise it executes myFilter on the word, and displays the result.
• Note that InteractiveFix should not know anything about specific factory or filter classes; it only knows about IFactory and IFilter.
FileFix:
• Has private attribute myFactory, which is a pointer to an IFactory.
• The constructor takes a pointer to an IFactory as an argument. It saves the factory object in myFactory.
• Has method ConvertFile, which takes string argument and returns nothing. The argument is the name of the input file. This method:
o Uses myFactory to create the appropriate filter object.
o Opens the input file and output file (same name but .fix suffix).
o Reads each line in the input file, converts it, and writes it to the output file.
o Closes both files.
• Note that FileFix should not know anything about specific factory or filter classes; it only knows about IFactory and IFilter.
main():
• Prompts the user for a filter name, using the FilterMgr to get the choices.
• Accepts a filter name from the user.
• If the filter name is “q”, the program quits.
• Uses the FilterMgr to get the appropriate factory object that can create the named filter. If the filter name is not one of the available filters, the user is prompted again.
• Now the user may repeatedly apply the filter in one of two modes.
o Prompt the user for the mode (“i” or “f”)
o If the mode is “q”, the program quits.
o If the mode is “i”, an InteractiveFix object is created and used to apply the filter interactively.
o If the mode is “f”, the user is prompted for a file name then a FileFix object is created and used to apply the filter to a file.
• Note that main() should not know about any of the specific factory classes; it only knows about IFactory.
• Note that main() should not know anything about filters.

Related Discussions:- factory method

List any characteristics of a good srs, List any three characteristics of a...

List any three characteristics of a good SRS. Ans:The SRS should be: Correct , Unambiguous, Complete 1. Correct: An SRS is correct if each requirement stated therein is on

What is statement coverage, What is statement coverage? Statement cover...

What is statement coverage? Statement coverage is the testing to test each statement in the code has been executed at least once.

How a prototype can be categorised, How a prototype can be categorised ...

How a prototype can be categorised 1.  A paper prototype which is a model depicting human machine interaction in a form which makes user understand how such interaction, would

Need help with my program deadline is tomoroow , I have a vb.net applicatio...

I have a vb.net application i would like to add database function + coding the the function to let the application work and also to add a login window for the customers + custom

What is verification represent, What is Verification represent? Verific...

What is Verification represent? Verification represents the set of actions that are performed to confirm that the software correctly implements the particular functionality.

What are the benefits of using bi dashboards, Question: (a) Explain wha...

Question: (a) Explain what is meant by Dimensional Modeling as used in Business Intelligence (BI) solutions. (b) There has been a request from the Managing Director of an In

State the strategies of software testing, State the strategies of Software ...

State the strategies of Software testing Two testing strategies are present. i) Code Testing: Code testing strategy examines the logic of the system.  In this, analyst deve

Explain path testing, Testing to satisfy coverage criteria that every logic...

Testing to satisfy coverage criteria that every logical path by the program be tested. Often paths by the program are grouped into a finite set of classes. Single path from every c

Explain the evolutionary model, Explain the Evolutionary Model. Ideal f...

Explain the Evolutionary Model. Ideal for software products that have their feature sets redefined during development because of user feedback and other factors. The Evolutiona

Importances of data dictonery, want an prestentation

want an prestentation

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd