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 is system simulation, What is System Simulation? Normal 0 ...

What is System Simulation? Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

How can manager be used to handle exceptions in QTP, How can recovery scena...

How can recovery scenario manager be used to handle exceptions in QTP? QTP provides a wizard through Recovery Scenario Manger which can recover unexpected errors and events wh

Explain the test specification and test suite, Explain the Test Specificati...

Explain the Test Specification and Test Suite: - This is a document verifying the test approach for a software feature or combination or features and the inputs, predicted resu

How does a countermeasure affect a project plan, Question: a) Failures ...

Question: a) Failures in software development would include excessive cost and/or schedule delays to never fielding a system. Briefly explain the risks associated with develop

Software quality and testing issues, Software quality and testing issues: ...

Software quality and testing issues: The aim of this assignment is to enable students to conduct an in-depth research on software quality and testing issues. Software Quality

Data Dictionary, The University needs to develop an online student registra...

The University needs to develop an online student registration system for new CAO entrants. This system will allow new students to enroll in their university course. Each student i

Elaborate on the characteristics of a good team player, Question 1: In ...

Question 1: In his book Tales of a New America, Robert Reich describes the importance of teamwork in an increasingly technological age: Rarely do even Big Ideas emerge any l

What are the testing principles the software engineer, What are the testing...

What are the testing principles the software engineer must apply while performing the software testing? i. All tests should be traceable according to customer requirements.

Write about drivers and stubs, Write about drivers and stubs. Drivers a...

Write about drivers and stubs. Drivers and stub software require to be developed to test incompatible software. The " driver" is a program that accepts the test data and pri

Define repeated inheritance and encapsulation, Q. Define Repeated inheritan...

Q. Define Repeated inheritance and Encapsulation? Repeated inheritance If a class inherits in excess of once from the same class then it is referred to as repeated inherit

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