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

What does verification represent, What does Verification represent? Ver...

What does Verification represent? Verification shows the set of activities that are carried out to confirm that the software correctly executes the specific functionality.

Explain test case, Documentation verifying inputs, predicted results, and a...

Documentation verifying inputs, predicted results, and a set of implementation conditions for a test item. A test case is a document that explains an input, action, or event and

Post-production design feedback for future designs, Q. Post-production desi...

Q. Post-production design feedback for future designs ? Post-production design feedback for future designs Implementation it is introducing the designed solution into

Explain system testing, The process of testing an integrated hardware and s...

The process of testing an integrated hardware and software system to determine that the system meets its described requirements. Such testing might be conducted in both the develop

Design and run the usability testing, You have been commissioned to design ...

You have been commissioned to design and run the usability testing for an upcoming e-commerce website that will sell computing hardware and software. In this first part of the

What is software maintenance, What is software maintenance? Changes to...

What is software maintenance? Changes to the software are made in response to altered requirements but the fundamental structure of the software remains stable.

What is the disadvantage of the set protocol, Question: (a) What mecha...

Question: (a) What mechanism does illegal spammers exploit to send spam? (b) What is a hoax? (c) Name two ways in which you can increase the privacy of e-mail. (d)

What is operational requirements, What is Operational Requirements? Ans)...

What is Operational Requirements? Ans) Qualitative and quantitative parameters that states the desired operational capabilities of a system and serve as a basis for determining

Iterative enhancement and evolutionary development model, Q. Differentiate ...

Q. Differentiate between iterative Enhancement Model and Evolutionary Development model. Ans. Iterative Enhancement Model: This model has the similar phases as the waterfall

Classify the techniques into dynamic or static, Classify the below techniqu...

Classify the below techniques into dynamic or static. i. Data Flow Analysis. ii. Use Case Testing. iii. Equivalence Partitioning. iv. Exploratory Testing. v. Inspec

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