package dao;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

import pojo.Book;

public class BookDao {
	
	
	public BookDao() {
		super();
	}

	public void object2File(ArrayList<Book> bookList){
		ObjectOutputStream oos = null;
		try {
			oos = new ObjectOutputStream(new FileOutputStream("d:/books.dat"));
			oos.writeObject(bookList);
			oos.flush();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally{
			try {
				oos.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	public ArrayList<Book> file2Object(){
		ArrayList<Book> bookList = new ArrayList<Book>();
		File f = new File("d:/books.dat");
		if(f.exists()){
			ObjectInputStream ois = null;
			try {
				ois = new ObjectInputStream(new FileInputStream("d:/books.dat"));
				bookList = (ArrayList)ois.readObject();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (ClassNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} finally {
				try {
					ois.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
		return bookList;
	}
}