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

Enhance the effectiveness of visual support, Question: a) Discuss which...

Question: a) Discuss which communication method/s you would use in the following situations. Justify your answer. i. Congratulating an employee on obtaining a promotion.

Explain top down design, Top down design: A top down design approach begin...

Top down design: A top down design approach begins by identifying the main modules of the system, decomposing them into their lower level modules and iterating unless the desired

Describe software maintenance and it types, Software Engineering 1. Giv...

Software Engineering 1. Give the two roles of the software process. 2. Describe software maintenance and it types. 3. What is RAD model and its phases? 4. What do you

Determine the aspects of prototyping model., Determine the aspects of proto...

Determine the aspects of prototyping model. Figure below portrays prototyping model. Prototype model has the below aspects: (i)  It helps in determining user requirements

Illustrate key process areas of cmm, Q. Illustrate key process areas of CMM...

Q. Illustrate key process areas of CMM? The key process areas of CMM are 1. Requirements management that establishes a common relationship between the customer and developer

Draw a class diagram which represents the information, QUESTION Draw a ...

QUESTION Draw a class diagram which represents the information handled by the Online Bakery-equipments Ordering System. Your class should briefly and simply reflect the relatio

Relationship between people and effort, Ask question #Minimumreal time exam...

Ask question #Minimumreal time example 100 words accepted#

Modular software development, After studying the module you should understa...

After studying the module you should understand the principles and techniques associated with modular software development. After studying the module you should understand the c

Stats free, system architecture block diagram

system architecture block diagram

Relationship between agent technology and grid computing, Question: (a)...

Question: (a) Show three application areas for agents. (b) What do you meant by "temporally coupled coordination"? Provide an example of a temporally coupled coordination

Write Your Message!

Captcha
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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd