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

What are the testing principles the software engineer, What are the testing...

What are the testing principles the software engineer must apply while performing the software testing? i. All tests should be traceable according to customer requirements.

Define data objects attributes and relationship, Define Data objects, attr...

Define Data objects, attributes & relationship. Data object: Illustration of any composite information that must be understood by a software. It can be any external entity. Att

What are the characteristics of software, What are the characteristics of S...

What are the characteristics of Software Software is engineered or formed; it is not manufactured in the classical sense. Software doesn't wear out. Although the indu

Define software lifecycle, Define Software Lifecycle. Software Lifecycl...

Define Software Lifecycle. Software Lifecycle is the time period beginning with the idea for a Software product ending whenever the Software is unavailable for use. SLC = SL

Double link list, algorithums

algorithums

What does validation represent, What does Validation represent? Validat...

What does Validation represent? Validation shows the set of activities that ensure that the software that has been built is satisfying the customer needs.

Describe the main categories of e-commerce, Question 1: (a) A company w...

Question 1: (a) A company wishes to under-go a Business Process Re-engineering activity with respect to its core business processes. Explain the extent to which MIS could be

Answer, write a decision table that specifies the rules for the game of che...

write a decision table that specifies the rules for the game of checkers

What is software verification, What is software verification? Ans) In ge...

What is software verification? Ans) In general the demonstration of consistency, completeness, and correctness of the software at every stage and between every stage of the deve

Explain hybrid design, Hybrid design: Pure top-down or pure bottom up appr...

Hybrid design: Pure top-down or pure bottom up approaches are often not practical thus hybrid approach which combines  the above two approaches is often used.

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