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 is coupling, What is coupling? Coupling is the measure of intercon...

What is coupling? Coupling is the measure of interconnection between modules in a program structure. It depends on the interface complexity among modules.

Describe data dictionary, Describe Data dictionary ?

Describe Data dictionary ?

Define process specification, Define Process Specification. Process Sp...

Define Process Specification. Process Specification is used to explain all flow model processes that appear at the final level of refinement. Check & Convert pressure Ch

Functional testing and structural test, Differentiate between functional te...

Differentiate between functional testing and structural testing. Functional testing also known as behavioural testing or  Black box testing. In this methods, tester design te

Determine about software review, Determine about Software Review - This...

Determine about Software Review - This is an evaluation method that includes the bringing together a group of technical personnel to examine a software artifact in order to imp

Explain the difference between latent and masked defect, Explain the differ...

Explain the difference between Latent and Masked Defect. Latent Defect is one which has been in the system for a long time; but is discovered now. I.e. A defect which has been

Explain practical process quality, Practical process quality Explain pr...

Practical process quality Explain process standards such as how reviews should be conducted, configuration management, etc. Monitor the development process to make sure that

What is a real time system, What is a Real time system? Real time syste...

What is a Real time system? Real time system is a software system in which the correct functionalities of the system are dependent upon results formed by the system and the tim

Whta is boundary value analysis, Boundary Value Analysis:    It's widely ex...

Boundary Value Analysis:    It's widely examined that input values at the extreme ends of input domain cause more errors in system. More application errors happen at the boundaries

Software development plan , Phone Company (WLPC) is a provider of wireless ...

Phone Company (WLPC) is a provider of wireless phone service in the US with 100,000 customers serving mostly small markets. WLPC has just purchased additional airwaves in the US, C

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