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 the process of black box testing, Explain the process of Black box ...

Explain the process of Black box testing  This is applied during the later stage of testing.  It enables software developer to derive a set of input conditions which will fully

Determine the shared mode of QTP, Determine the Shared mode of QTP - ...

Determine the Shared mode of QTP - Best used in subsequent cases: - When there are numerous tests which correspond to interface, objects, or application - When test obj

Explain regression testing, Question 1 Explain Iterative Development Model...

Question 1 Explain Iterative Development Model in detail Question 2 What is statistical testing? What are the steps involved in statistical Testing Question 3 Explain wh

What does modularity concept mean, What does Modularity concept mean? S...

What does Modularity concept mean? Software architecture embodies modularity; ie, Software is named in to addressable components called as modules that are integrated finally.

What is class diagram, Class diagram: A class diagram in the Unified Model...

Class diagram: A class diagram in the Unified Modelling Language (UML) is a type of static structure diagram that defines the structure of a system by showing the system's classes

Write down the schema to represent the current system state, Question: ...

Question: Consider the University modular degree scheme where students choose a selection of modules from a large menu. Here we have the basic types [PERSON, MODULE], the set o

Define the types of requirements management, Define the types of Requiremen...

Define the types of Requirements management Requirements management comprises the below processes: 1. Identifying controls and tracking requirements. 2. Checking complete

How the restructuring helps in maintaining a program, The restructuring hel...

The restructuring helps in maintaining a program in the following ways:        (a) Programs have higher quality, good documentation, less complexity, and conformance to modern

What is vertical partitioning, What is Vertical partitioning 1. The Co...

What is Vertical partitioning 1. The Control & work should be Modular Hierarchy for each distributed top-down in the program major program function structure 2. Higher prob

Explain about special value testing, Q. Explain about Special Value Testing...

Q. Explain about Special Value Testing? Special Value Testing is the form of functional testing. Special value testing take places when a tester uses his or her domain knowle

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