/*******************************************************
* from http://home.att.net/~gobruen/
*
*
*LoopLL.java
*  
* called by Slots.java
* 
*   
*  Class LoopLL is a linked list for setting up the slot wheels
*	as circular lists
*
*  loopList() changes the null at the end into a link
*	to another item in the list
*  loadFromFirst() loads the second and third wheel from the first
*  spin() "spins" the wheels by going through the lists 
*	a random number of times
*
*
*****************************************************/

public class LoopLL{


	private Node startOfList = null;

	public void addTo(String data){
		Node newNode = new Node();
		newNode.data = data;
		newNode.next = startOfList;
		startOfList = newNode;
	
	}//end addFirst()
	
	class Node{
		String data;
		Node next = null;
	}//end Node()



	public String spin(int numOfSpins){
		Node current = startOfList;
		for(int i = numOfSpins;i>0;i--){
			current = current.next;
		}
		
	return current.data;
	}//end spin()

	public LoopLL loadFromFirst(int stPoint, LoopLL newWheel){
		Node current = startOfList;
		for(int i = 0; i<stPoint; i++){
			current = current.next;
		}
		for(int j = 14;j>0;j--){
			newWheel.addTo(current.data);
			current = current.next;
		}
		newWheel.loopList();
		return newWheel;
	}


	/* changes the end null to a link in the list */

	public void loopList(){
		Node current = startOfList;

		while(current.next != null){
			current = current.next;
		}
		/* bullocks up the list */
		current.next = startOfList;
		
	}//end loopList()


}