programming, Computer Network Security

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:- programming

Develop a preliminary simulation model, Question: (a) State the strong ...

Question: (a) State the strong law of large numbers. (b) Data have been collected on response times (in minutes) at a fire station. The data are 2:7 1:8 0:8 1:4 1:2 (i

Internet protocol(ip), Internet Protocol IP Gives computer-to-comp...

Internet Protocol IP Gives computer-to-computer communication. Host and receiver addresses are computers. This is also known machine-to-machine communication.

Location to e-mail messages are saved, In the e-mail system, where the e-ma...

In the e-mail system, where the e-mail messages are saved and why? E-mail messages are saved in user’s private electronic mailbox. A mailbox refers to a local/domestic hard drive c

Wireless networks, Wireless Networks The origin of wireless networks a...

Wireless Networks The origin of wireless networks and their ubiquity in the technological environment poses a new type of exposure and vulnerability for network security. Cont

Provide the network configuration, QUESTION: a) Below is a capture of a...

QUESTION: a) Below is a capture of an Ethernet II frame which has an IPv4 packet and a segment. Provide the source MAC address in hexadecimal; the source IP address, the length

Describe how ipsec provides data source authentication, Question: (a) ...

Question: (a) Describe how IPSec provides data source authentication. (b) Which protocol can be used to provide limited traffic analysis confidentiality? Why is it "limite

Draw the network layout, Question : a) Below is a capture of an Etherne...

Question : a) Below is a capture of an Ethernet II frame which contains an IPv4 packet and a TCP segment. Give the source MAC address for the frame in hexadecimal; the source I

Packets and frames, PACKETS: Packet is a generic word that define to sma...

PACKETS: Packet is a generic word that define to small code of data. Packet have different format. Each hardware needs different packet format.  FRAME: A hardware frame or

Traditional network design approach, Question: a) Give two reasons why ...

Question: a) Give two reasons why the building-block approach is favoured to the traditional network design approach. b) With reference to network monitoring parameters, dis

Websphere administrator, Websphere Administrator: Working as Webspher...

Websphere Administrator: Working as Websphere Administrator in the department called DART (Database Architecture Re-Engineering and Tuning). The major responsibilities are t

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