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 dfd for the given requirement, A store is in the business of selling p...

A store is in the business of selling paints as well as hardware items. A numeral of reputed companies supplies items to the store. New suppliers are able to also register with the

Computers and application, classification of computer application

classification of computer application

State in detail about the software design, State in detail about the Softwa...

State in detail about the Software design Software design is the core of software engineering process and first of three important technical activities that are design, coding,

Discuss in detail about cocomo model, Discuss in detail about COCOMO model....

Discuss in detail about COCOMO model. Constructive Cost Model. Software cost estimation gives the opportunity to estimate of how much months a man take to develop a softw

What are the objectives of analysis modeling, What are the objectives of An...

What are the objectives of Analysis modeling? i. To explain what the customer needs. ii. To establish a basis for the creation of software design. iii. To devise a set of

What are the three activities of risk assessment, What are the three activi...

What are the three activities of risk assessment? The three activities are identifying, examining and giving priorities . Risks can be identified by a check list or looking at

Differentiate between application and system software, Question: (a) Di...

Question: (a) Differentiate between application software and system software. (b) Mr. Smith would like to know which type of computer is more appropriate to process the inf

What is data validity, Data validity is the reasonableness and correctness ...

Data validity is the reasonableness and correctness of data.

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

Define software testing. Software testing is a process used to help recognize the correctness, completeness and superiority of developed computer software. With that in mind, t

What is software testing, What is software testing? The testing process...

What is software testing? The testing process focuses on the logical internals of the software, ensuring that all statements have been tested, and on the functional externals,

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