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

Explain storage testing, This is a explanation of whether or not certain pr...

This is a explanation of whether or not certain processing conditions use many storage [memory] than estimated.

Structured analysis model, Structured Analysis Model Structured  analy...

Structured Analysis Model Structured  analysis is the  most  broadly  used  of  requirements  modeling  techniques  relies  on flow modeling and data modeling to established t

Describe in brief about throw away prototyping, Describe in brief about Th...

Describe in brief about Throw away Prototyping ?

What are dynamic testing tools, What are dynamic testing tools?  Dynami...

What are dynamic testing tools?  Dynamic testing tools:  1: coverage analyzers (execution verifiers 2: output comparators 3: Test data generators: 4:  Test file gen

P, a simple text processing program with all essential functions (open and ...

a simple text processing program with all essential functions (open and save text documents, insert and delete text, search for words). We assume that text read from a file is stor

Supermarkets, A supermarket requires to develop software to encourage regul...

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. A

What is security testing, What is security testing? Security testing at...

What is security testing? Security testing attempts to determine that protection mechanism built into a system will protect it from improper penetration.

Explain metrics assumptions of software metrics, Explain Metrics assumption...

Explain Metrics assumptions of Software metrics Software metrics A software property can be calculated. The relationship exists among what we can measure and what we

Name some common software standards, Name some Software Standards Num...

Name some Software Standards Numerous terms related to software engineering are regularly standardised by organisations like IEEE (Institute of Electrical and Electronics Engi

What is user documentation, "User documentation" is a document that explain...

"User documentation" is a document that explains the way a software product or system should be used to get the desired results.

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