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

Applied physics, an isolated metal sphere has a radius r. when charged to a...

an isolated metal sphere has a radius r. when charged to a potential v, the charge on sphere is q. 1- state an expression, in terms of r and q, for potential v of sphere.

Micro program, micro program control

micro program control

Determine about the bottlenecks of performance testing, What kinds of bottl...

What kinds of bottlenecks can be expected in performance testing? Bottlenecks in performance testing can have below effects: - It can affect the performance and the scalabil

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

Explain the throw away prototype, Explain the Throw away prototype I...

Explain the Throw away prototype In this technique, prototype is discarded once its purpose is fulfilled and final system is built from scratch. Prototype is built quickly t

What is test documentation, Documentation explaining plans for, or results ...

Documentation explaining plans for, or results of, the testing of a system or component, Types contain test case specification, test incident report, test log, test procedure, test

Difference between module coupling and module collection, What is the diffe...

What is the difference between module coupling and module collection? Cohesion is the property of a one module and can be defined as glue that keeps the data elements within a

What are the various level of testing, Testing is a process of implementing...

Testing is a process of implementing a program with the intent of finding an error. Various level of testing are :    Unit Testing     Integrating testing     Valida

Use of software package, USE OF SOFTWARE PACKAGE: The concept of appli...

USE OF SOFTWARE PACKAGE: The concept of applications software and were told about software packages and their types. In other words, the discussion implies that instead of wri

Design and run the usability testing, You have been commissioned to design ...

You have been commissioned to design and run the usability testing for an upcoming e-commerce website that will sell computing hardware and software. In this first part of the

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