package com.comp;

import java.util.*;

public class SortUserBean {

	public static void main(String[] args) {
		
		SortUserBean so=new SortUserBean();
		ArrayList arrayOfUserBeans=so.getUserBeanObjects();
		System.out.println ("Before sorting.. lets see results \n");
		int i=0;
		while (i<arrayOfUserBeans.size()){
			
			UserBean aRecord=(UserBean)arrayOfUserBeans.get(i);
			System.out.println(aRecord.getUserName());			
			i++;
		}
		
		System.out.println("++++++++++++++++++++++ Completed results without sorting +++++++++++++++++++++++ \n");

		System.out.println("After sorting ... lets see results \n");

//this is the important method.. The Collections.sort() sorts the List (first Argument) based on the Comparator (second Argument)

		Collections.sort(arrayOfUserBeans,new UserNameComparator());

		i=0;
		while (i<arrayOfUserBeans.size()){
			
			UserBean aRecord=(UserBean)arrayOfUserBeans.get(i);
			System.out.println(aRecord.getUserName());			
			i++;
		}		
		
		System.out.println("++++++++++++++++++++++ Completed results after sorting +++++++++++++++++++++++ \n");
	}
	
	
	public ArrayList getUserBeanObjects(){
		
		//this method would return an ArrayList from database or some other source
		
		//For now, I am creating it on my own.
		
		ArrayList arrayOfUserBeans=new ArrayList();
		
		UserBean bean1=new UserBean ();
		bean1.setUserId(1);
		bean1.setUserName("Arun");
		bean1.setAddress("India");
		arrayOfUserBeans.add(bean1);
		
		UserBean bean2=new UserBean ();
		bean2.setUserId(1);
		bean2.setUserName("Kathy Sierra");
		bean2.setAddress("Sorry Peter"); // ;-)
		arrayOfUserBeans.add(bean2);
		
		UserBean bean3=new UserBean ();
		bean3.setUserId(1);
		bean3.setUserName("Aishwarya Rai");
		bean3.setAddress("hehehe ...");
		arrayOfUserBeans.add(bean3);
		
		return arrayOfUserBeans;
		
	}
}