package exceptionhandling;

import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;

/**
   This program serializes an ArrayList of BankAccount2 objects.
*/

public class SerializeObjects
{
           
    public static void main(String[] args) throws IOException, ClassNotFoundException 
    {
        ArrayList<BankAccount2> accountList = new ArrayList<>();
        final int NUM_ITEMS = 3;
        double balance;        
        
        String defaultFileName = "/Users/Mayelin/Documents/Teaching/COP3804/Input_Output_Files/BankAccountObjects.ser";
        Object deSerializedObj = null;
        
        // Get the serialization file name from the program argument list; else use a default value.
        String serializationFileName;
        if (args.length > 0)
            serializationFileName = args[0];
        else
            serializationFileName = defaultFileName;

        // try to initialize the accountList object with value from the serialization file.
        try
        {
            deSerializedObj = deSerializeObject(serializationFileName);
        }
        catch(FileNotFoundException ex)
        {
            System.out.println( "No serialization file was found.");
        }
        
        if (deSerializedObj != null && deSerializedObj instanceof ArrayList)
            accountList = (ArrayList) deSerializedObj;
                

        // Create a Scanner object for keyboard input.
        Scanner keyboard = new Scanner(System.in);

        // Populate the arraylist
        for (int i = 0; i < NUM_ITEMS; i++) 
        {
            // Get an account balance.
            System.out.print("Enter the balance for account " + (i + 1) + ": ");
            balance = keyboard.nextDouble();

            // Add an object to the arraylist.
            accountList.add(new BankAccount2(balance));
        }

        System.out.println(accountList);
        serializeObject(accountList, serializationFileName);
    }
   
    
   public static Object deSerializeObject(String fileName) throws IOException, ClassNotFoundException
   {     
        // the following line may throw a FileNotFoundException (a subclass of IOException)
        FileInputStream dataFile = new FileInputStream(fileName);
            
        // the following line may throw an IOException
        ObjectInputStream objectInputStream = new ObjectInputStream(dataFile);

        // the following line may throw an IOException and/or a ClassNotFoundException
        Object deSerializedObject = objectInputStream.readObject();
            
        dataFile.close();
       
        objectInputStream.close();
          
        return deSerializedObject;
   }
   
   public static void serializeObject(Object objectToSerialize, String fileName) throws IOException, ClassNotFoundException
   {
        // the following line may throw a FileNotFoundException (a subclass of IOException) 
        FileOutputStream outStream = new FileOutputStream(fileName);
        
        // the following line may throw an IOException
        ObjectOutputStream objectOutputFile = new ObjectOutputStream(outStream);
      
        // the following line may throw an IOException
        objectOutputFile.writeObject(objectToSerialize);
      
        objectOutputFile.close();
        
        outStream.close();
      
        System.out.println("The serialized object was written to the file.");
   }
}