File-Allocation-Project/Allocate.java at main · TheHanys/File-Allocation-Project · GitHub

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package fileallocation;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.Random;

public class Allocate
{
    Fylat blocks[];
    public ArrayList<Fylat> files;
    public ArrayList<ArrayList<Integer>> indexed;
    Random rand = new Random();
    public int lastaccess;
    int blocknum;


    public Allocate(int blocknum, ArrayList<Fylat> files)
    {
        this.blocknum=blocknum;
        blocks=new Fylat[blocknum];
        this.files=files;
        indexed=new ArrayList<ArrayList<Integer>>();
    }
    public void display()
    {
        for(int i=0;i<blocks.length;i++)
        {
            if(blocks[i]==null)
            {
                System.out.println("Block number: "+i+" is empty");
            }
            else
            {
                System.out.println("Block number: "+i+" contains the file: "+blocks[i].filename);
            }
        }
    }
    public void contiguous()
    {
        int count; // count=hagm el file
        System.out.println("**************\n");
        System.out.println("Display #1 \n");
        System.out.println("**************\n\n");

        for (int i = 0; i < files.size(); i++)
	{
            this.lastaccess = rand.nextInt(blocknum);

            while(blocks[lastaccess]!= null)
            {
                this.lastaccess = rand.nextInt(blocknum);
            }
            if(lastaccess+files.get(i).filesize<blocks.length)
            {
                count=0;
                for (int j = lastaccess; j < files.get(i).filesize + lastaccess; j++)
                {
                    if(blocks[j]==null)
                    {
                        count++;
                    }
                }
                if (count==files.get(i).filesize)
                {
                    for(int z =lastaccess;z<lastaccess+count;z++)
                    {
                        blocks[z]=files.get(i);
                    }
                    System.out.println("File "+files.get(i).filename +"'s starting block is: " + (lastaccess));
                    int size;
                    size=lastaccess;
                    lastaccess+=count; // start mn akher mkan w2f feh el file
                    System.out.println("File "+files.get(i).filename +"'s ending block is: " + (lastaccess-1));
                    System.out.println("File "+files.get(i).filename +"'s size is: " + (lastaccess-size));
                }
            }
            else
            {
                System.out.println("File "+files.get(i).filename +" can't be allocated");
            }
        }
        System.out.println("\n**************\n");
        System.out.println("Display #2 \n");
        System.out.println("**************\n");
    }
    public void linked()
    {
       int count; // count=hagm el file
        System.out.println("**************\n");
        System.out.println("Display #1 \n");
        System.out.println("**************\n\n");

        for (int i = 0; i < files.size(); i++)
	{
            int check=0;
            for(int z=0;z<blocks.length;z++)
            {
                if(blocks[z]==null)
                {
                    check++;
                }
            }
            if(check>=files.get(i).filesize)
            {
                this.lastaccess = rand.nextInt(blocknum);

                count=0;

                while(count!=files.get(i).filesize)
                {
                    while(blocks[lastaccess]!= null)
                    {
                        this.lastaccess = rand.nextInt(blocknum);
                    }
                    blocks[this.lastaccess]=files.get(i);
                    count++;
                    if (count==1)
                    {
                        System.out.println("File "+files.get(i).filename +"'s starting block is: " + (lastaccess));
                    }
                }
                    System.out.println("File "+files.get(i).filename +"'s ending block is: " + (lastaccess));
                    System.out.println("File "+files.get(i).filename +"'s size is: " + (count));
            }
            else
            {
                System.out.println("File "+files.get(i).filename +" can't be allocated");
            }
        }
        System.out.println("\n**************\n");
        System.out.println("Display #2 \n");
        System.out.println("**************\n");
    }

    public void indexed()
    {
        int count=0;
        for(int i=0;i<files.size();i++)
        {
            indexed.add(new ArrayList<Integer>());//two dim array rakam el file w ely byshawr
            int check=0;
            for(int z=0;z<blocks.length;z++)
            {
                if(blocks[z]==null)
                {
                    check++;
                }
            }
            if(check>=files.get(i).filesize)
            {
                int counter2=0;
                this.lastaccess = rand.nextInt(blocknum);
                if(counter2==0&&blocks[lastaccess]==null)
                {
                    files.get(i).start=indexed.get(i);
                }

                count=0;
                while(count!=files.get(i).filesize)
                {
                    while(blocks[lastaccess]!= null)
                    {
                        this.lastaccess = rand.nextInt(blocknum);
                    }
                    blocks[this.lastaccess]=files.get(i);
                    files.get(i).start.add(lastaccess);
                    count++;
                    counter2++;
                }
            }
        }
        for(int j=0;j<indexed.size();j++)
        {
            System.out.println(" File " + j);
            for(int z=0;z<indexed.get(j).size();z++)
            {
                if(z==indexed.get(j).size()-1)
                {
                     System.out.println(" File Block "+j+" Memory Block Number "+indexed.get(j).get(z)+" Next BLock Number: None ");
                     break;
                }
             System.out.println(" File Block "+j+" Memory Block Number "+indexed.get(j).get(z)+" Next BLock Number "+indexed.get(j).get(z+1));
            }
            System.out.println("");
        }
    }
}