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 quality control, What is quality control? Ans) Quality control m...

What is quality control? Ans) Quality control means to preserve the quality of product by measuring their content , different physical parameters.

What is cause-effect graphing, A testing method that aids in selecting, in ...

A testing method that aids in selecting, in a systematic way, a high-yield set of test cases that logically relates causes to effects to produce test cases. It has a useful side ef

Describe the various types of coupling, Describe the various types of coupl...

Describe the various types of coupling? i. Data coupling - The data coupling is possible by parameter passing or data interaction. ii. Control coupling - The modules share c

Explain virtual memory, Explain virtual memory? Ans) Virtual memory tell...

Explain virtual memory? Ans) Virtual memory tells to virtual storage. In virtual storage, portions of a user's program and data are placed in auxiliary storage, and the operatin

Define aggregation among objects, Q. Define Aggregation among objects? ...

Q. Define Aggregation among objects? Aggregation between objects represents a relationship. It is a whole/part relationship. Aggregation may perhaps imply containment.

What is up time, What is Up time? "Up time" is the time period when a me...

What is Up time? "Up time" is the time period when a method is operational and in service. Up time is the sum of idle time and busy time.

Explain the concept of top down design, Q. Explain the concept of Top down ...

Q. Explain the concept of Top down design? Top down design: A top down design approach begins by identifying the major modules of the system decomposing them into their lower

Explain structural things using conceptual model, Question: Part of the...

Question: Part of the conceptual model of UML is made up of four "things": "Structural things", Behavioral things", "Grouping things" and "Annotational things". Explain, using

What is code coverage and code inspection, What is Code Coverage and Code I...

What is Code Coverage and Code Inspection - This is an analysis method which verifies which parts of the software have already been covered by the test case suite and which are

Produce a use case diagram, ZeroJet, a new low cost airline, wants a brand ...

ZeroJet, a new low cost airline, wants a brand new web-based system to allow people to book seats for flights on-line.  They want an automated check in system which has no staff.

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