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

Show the advantages of incremental model, Q. Show the Advantages of increme...

Q. Show the Advantages of incremental Model? As product is to be conveying in parts total cost of the project is distributed. Limited number of persons is able to be pu

Explain the per-action modeof QTP, Explain the Per-action modeof QTP ...

Explain the Per-action modeof QTP - Best used in below cases: - When creating simple record and run tests when there is just one or very few tests which correspond to int

Layered software architecture, iii. Layered software architectures can be ...

iii. Layered software architectures can be used to reduce coupling between the functions of a system that are closer to the machine and those that are closer to user needs. Why is

Define software testing, Define software testing? Software testing is a...

Define software testing? Software testing is a critical element of software quality assurance and shows the ultimate review of specification, design, and coding.

Explain core dumps, Core dumps Core dumps are a debugging method. A pri...

Core dumps Core dumps are a debugging method. A printout of all relevant memory locations is obtained and studied. All dumps should be well documented and retained for possible

Defining intermediate representation, Problem 1 (i) Define the terms ...

Problem 1 (i) Define the terms Language Grammar Terminal symbols Non-Terminal symbols Alphabets >>Define sub parts (ii) Identify and write what these

What is clear box testing, Clear box testing is the similar as white box te...

Clear box testing is the similar as white box testing. It is a testing approach that consider the application's program structure, and acquires test cases from the application's pr

Designing website, I have to make assets for the design that i have done fo...

I have to make assets for the design that i have done for the website but i dont know how to do it can you please help me?

Compare and contrast reliability and availability, Q. Compare and contrast ...

Q. Compare and contrast reliability and availability? Ans. Reliability: The probability of failure-free system operation over a specified time in a given environment for a gi

Write Your Message!

Captcha
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!

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