COMP2240-Assignment2/Code/P1.java

import java.util.*;
import java.util.concurrent.Semaphore;

import java.io.*;

public class P1 {

/**
 * COMP2240 Assignment 2
 * Date: 
 * Author: Zach S-B
 * Student Number: c3262201
 */
    
    LinkedList<P1_War> WARs = new LinkedList<P1_War>();     //Holds the WARs
    LinkedList<Thread> threads = new LinkedList<Thread>();  //For holding threads
    Semaphore intersection = new Semaphore(1, true);

    int[] tracks = new int[2];


 /**
     * Main. Runs the program
     */
    public static void main(String[] args){
        P1 system = new P1();
        system.run();
    }

    public void run()
    {
        tracks[0]=0;
        tracks[1]=0;

        readFile("../P1-1in.txt");
        //Create thread for each war
        for(int i = 0; i < WARs.size(); i++)
        {
            threads.add(new Thread(WARs.get(i)));
            threads.get(i).start();
        }
    }

    /**
     * readFile. Reads the file given, creating processes as needed to save details.
     * @param fileNameInput address of the file to be read in.
     */
    public void readFile(String input)
    {
        Scanner fileReader; //Scanner to read the file.
        File dataInput;// = new File(fileNameInput);

        dataInput = new File(input);

        //Try and open file. If it works, procede.
        try {
            fileReader = new Scanner(dataInput);

            //Assuming only one line in file.
            String line = fileReader.nextLine();

            int warNum = 1;
            for (int charNum = 0; charNum < line.length(); charNum++)
            {
                if(line.charAt(charNum)=='N')
                {
                    charNum+=2;
                    int inputID = line.charAt(charNum) - '0';

                    for(int i = 0; i< inputID; i++)
                    {

                        WARs.add(new P1_War(warNum, 2, false, intersection, tracks));
                        //WARs.add(new Thread(new P1_War(warNum, 2, false, intersection)));
                        warNum++;
                    }
                }      
                else if(line.charAt(charNum)=='S')
                {
                    charNum+=2;
                    int inputID = line.charAt(charNum) - '0';

                    for(int i = 0; i< inputID; i++)
                    {
                        WARs.add(new P1_War(warNum, 2, true, intersection, tracks));
                        warNum++;
                    }
                }  
                else if(line.charAt(charNum)=='E')
                {
                    charNum+=2;
                    int inputID = line.charAt(charNum) - '0';

                    for(int i = 0; i< inputID; i++)
                    {
                        WARs.add(new P1_War(warNum, 1, false, intersection, tracks));
                        warNum++;
                    }
                }  
                else if(line.charAt(charNum)=='W')
                {
                    charNum+=2;
                    int inputID = line.charAt(charNum) - '0';

                    for(int i = 0; i< inputID; i++)
                    {
                        WARs.add(new P1_War(warNum, 1, true, intersection, tracks));
                        warNum++;
                    }
                }                                                                         
            }
            fileReader.close();
        } 
        
        //If the file isn't found, throw a hissy fit.
        catch (FileNotFoundException e) {
            System.out.println("File not found.");
            System.exit(0);
            //e.printStackTrace();  //Optional, shows more data.
        }
    }   

    public void printState()
    {
        System.out.print("(E) WARs at Storage 1: ");
        int storage1 = 0;
        for (int i = 0; i<WARs.size(); i++)
        {
            if((WARs.get(i).getTrackNum()==1)&&(WARs.get(i).getAtDock()==false))
            {
                storage1++;
                System.out.print("WAR"+WARs.get(i).getID()+", ");
            }
        }
        System.out.println("Total: " + storage1);

        System.out.print("(W) WARs at Dock 1: ");
        int dock1 = 0;
        for (int i = 0; i<WARs.size(); i++)
        {
            if((WARs.get(i).getTrackNum()==1)&&(WARs.get(i).getAtDock()==true))
            {
                dock1++;
                System.out.print("WAR"+WARs.get(i).getID()+", ");
            }
        }
        System.out.println("Total: " + dock1);        
        System.out.print("(N) WARs at Storage 2: ");
        int storage2 = 0;
        for (int i = 0; i<WARs.size(); i++)
        {
            if((WARs.get(i).getTrackNum()==2)&&(WARs.get(i).getAtDock()==false))
            {
                storage2++;
                System.out.print("WAR"+WARs.get(i).getID()+", ");
            }
        }
        System.out.println("Total: " + storage2);

        System.out.print("(S) WARs at Dock 2: ");
        int dock2 = 0;
        for (int i = 0; i<WARs.size(); i++)
        {
            if((WARs.get(i).getTrackNum()==2)&&(WARs.get(i).getAtDock()==true))
            {
                dock2++;
                System.out.print("WAR"+WARs.get(i).getID()+", ");
            }
        }
        System.out.println("Total: " + dock2); 
    }    
}