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 dynamic testing, Verification or validation performed which impleme...

Verification or validation performed which implements the system's code.

Briefly explain the requirement capture methods, Problem: (a) Briefly e...

Problem: (a) Briefly explain the requirement capture methods. (c) Using examples, write short notes on the following: i) Aggregation ii) Composition iii) Generalisation

What do you mean by class, Q. What do you mean by class? A class is a t...

Q. What do you mean by class? A class is a template that specifies the properties of objects. Classes have an interface that consists of the operation a body which implements t

Feasibility analysis report, Aim to follow the weekly schedule - some time ...

Aim to follow the weekly schedule - some time in each tutorial class will be devoted to working in your teams of two under the guidance of your tutor on this project.  However, te

What is masm? explain its features, Question 1 What is MASM? Explain its f...

Question 1 What is MASM? Explain its features Question 2 Explain the significance of Lexical analysis and Syntax analysis Question 3 What are macros and macro processors

Data dictionary , data dictionary of online banking system

data dictionary of online banking system

System analysis & design, Describe attributes, properties, and characterist...

Describe attributes, properties, and characteristics of system.

What do you understand by software crisis, Q. What do you understand by Sof...

Q. What do you understand by Software Crisis? Ans) Organizations are spending much larger portions of their budget on software. Not only are the software turning out to be more

Data dictionary, data dictionary on library management system

data dictionary on library management system

What are the benefits of using stored procedures, What are the benefits of ...

What are the benefits of using Stored Procedures? - They help in reducing network traffic and latency which in turn boosts application performance. - They assist in promotin

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