<?php

//copyright Lawrence Truett and FluffyCat.com 2006, all rights reserved
  
  include_once('FlyweightBook.php');
  
  class FlyweightFactory {
      
    private $books = array(); 
    
    function __construct() {
      $this->books[1] = NULL;
      $this->books[2] = NULL;
      $this->books[3] = NULL;
    }
  
    function getBook($bookKey) {
      if (NULL == $this->books[$bookKey]) {
        $makeFunction = 'makeBook'.$bookKey;
        $this->books[$bookKey] = $this->$makeFunction(); 
      } 
      return $this->books[$bookKey];
    }
    
    //Sort of an long way to do this, but hopefully easy to follow.  
    //How you really want to make flyweights would depend on what 
    //your application needs.  This, while a little clumbsy looking,
    //does work well.
    function makeBook1() {
      $book = new FlyweightBook('Larry Truett','PHP For Cats'); 
      return $book;
    }

    function makeBook2() {
      $book = new FlyweightBook('Larry Truett','PHP For Dogs'); 
      return $book;
    }

    function makeBook3() {
      $book = new FlyweightBook('Larry Truett','PHP For Parakeets'); 
      return $book;
    }

  }
?>