<?php

//copyright Lawrence Truett and FluffyCat.com 2005, all rights reserved

  include_once('Book.php');
  include_once('BookList.php');

  class BookListIterator {
	
    protected $bookList;
    protected $currentBook = 0;

    public function __construct(BookList $bookList_in) {
      $this->bookList = $bookList_in;
    }
	
    public function getCurrentBook() {
	  if (($this->currentBook > 0) && 
          ($this->bookList->getBookCount() >= $this->currentBook)) {
        return $this->bookList->getBook($this->currentBook);
      }
    }

    public function getNextBook() {
	  if ($this->hasNextBook()) {
        return $this->bookList->getBook(++$this->currentBook);
      } else {
        return NULL;
      }
    }

    public function hasNextBook() {
      if ($this->bookList->getBookCount() > $this->currentBook) {
	    return TRUE;
	  } else {
        return FALSE;
	  }
    }
	
  }
?>