Assignment: The NSA will provide any profile connection in the form of a text file. Every three lines in the file is reserved for the record of a person. These three lines respectively represent a long integer ID of a person, the name of the person, and an integer ranging from 0 to 5 indicating the threat level posed by a person. A sample connection profile file is provided below, which gives a connection profile between two PoIs, Dan Carte and Osama Laden. The full connection is: Dan Carte -> Prio Notim -> Hons Nohish -> Diran Egrac -> Osama Laden.

Sample Text File

389114

Dan Carte

5

399012

Prio Notim

0

685015

Hons Nohish

3

179318

Diran Egrac

2

284139

Osama Laden

5

Your task is to read the file content, construct a singly linked list to store the records in a sequence they appear in the file, and allow flexibility to the analysts so that she/he can perform the following operations.

Operation 1. Print the linked list content on the terminal (ID, name, and threat level of the people in a sequence they appear in the linked list)

Operation 2. Search a person in the linked list with ID

Operation 3. Insert a new person in a particular location index

Operation 4. Swap two people in two specific location indices

Operation 5. Remove a record containing a specific ID

Operation 6. Remove all records with a certain threat level

Operation 7. Write the content of the linked list in an output file that has the same format as the input file.

Operation 8. Quit program.

Your program must start by prompting the user to provide the filename of the input connection profile. Then the program should load the information in a linked list and prompt the user to perform one of the eight operations listed above. Operations 2 to 7 will require more prompting to the user for operation-specific information.

Other requirements:

You must write three classes: POI, POIList, and AnalyzePOI.

o POI.java: The POI class must hold the variables for the ID (long), name (String), and threat level (int). All these variables must be private. POI must also have a variable of POI type that can be used to point to the next POI object. This variable should be public.

o POIList.java: This class must contain a data variable named head of POI type, which should contain the head address of the constructed linked list. Each of the operations from 1 to 7 must be implemented in a method of this class.

o AnalyzePOI.java: This is the only class that will contain a main method. This class will be responsible for prompting the user for the input filename, creating the linked list (a POIList object), and prompting for the seven listed operations. AnalyzePOI must call appropriate methods associated with the POIList object to perform operations 1 to 7. Prompts for operation specific-information must be implemented in the POIList class, not in AnalyzePOI.

As stated earlier, your program must start by prompting the user to provide the filename of the input connection profile. You must handle the following exceptions. Do not quit the program if you have these exceptions, rather give an error message and prompt the user again for a correct input file.

o If the file does not exist

o If an expected ID in the file is not a long integer

o If threat level is not in integer

o If threat level is not an integer between 0 to 5 (threat level can be 0, or 5, or any integer between 0 and 5)

Make sure that your program is not vulnerable to users incorrect input regarding the operations.