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

Draw the context diagram, Q. A supermarket requires to develop software to ...

Q. A supermarket requires to develop software to encourage regular customers. For this the customer requires to supply his name address telephone number and driving license number.

Describe in brief about the elementary process, Elucidate elementary proces...

Elucidate elementary process. Software applications are a combination of various elementary processes. Various elementary processes come together to form an application. Ele

Explain the capability maturity model, Explain the CAPABILITY MATURITY MODE...

Explain the CAPABILITY MATURITY MODELS Process models are based on various software development phases while capability models have an entirely different foundation of developm

What is recovery testing and security testing, What is recovery testing and...

What is recovery testing and Security testing  Recovery testing is system tests that bind the software to fail in a variety of ways and justify that recovery is correctly perf

Draw a use case diagram, QUESTION (a) Draw a use case diagram (UCD) for...

QUESTION (a) Draw a use case diagram (UCD) for the given case study. For any one use case give a detail use case specification (b) Describe the different phases and workflow

What is requirement engineering, What is requirement engineering? Requ...

What is requirement engineering? Requirement engineering is the process of establishing the services that the customer needs from the system and the constraints under which it

What is code review, A meeting at which software code is presented to proje...

A meeting at which software code is presented to project personnel, users,  managers,  customers, or other interested parties for approval or comment. Contrast with code audit, cod

What is comparison testing, Comparison testing is testing that evaluate sof...

Comparison testing is testing that evaluate software weaknesses and strengths to those of competitors' products.

What is volume testing, Testing designed to challenge a system's capability...

Testing designed to challenge a system's capability to handle the maximum amount of data over a period of time. This type of testing also classify a system's ability to handle over

Explain what is the resource discovery problem, Question: (a) Explain ...

Question: (a) Explain what is the resource discovery problem? (b) Distinguish between centralized (hybrid) and decentralized (pure) peer to peer network? (c) Give an e

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