gistfile1.php

<?php
class User_Model_Users implements Iterator, Countable {
	
	protected $_count;
	protected $_gateway;
	protected $_resultSet;
	
	public function __construct($results, $gateway) {
		$this->setGateway ( $gateway );
		$this->_resultSet = $results;
	}
	
	public function setGateway(User_Model_UserGateway $gateway) {
		$this->_gateway = $gateway;
		return $this;
	}
	
	public function getGateway() {
		return $this->_gateway;
	}
	
	public function count() {
		if (null === $this->_count) {
			$this->_count = count ( $this->_resultSet );
		}
		return $this->_count;
	}
	
	public function current() {
		if ($this->_resultSet instanceof Iterator) {
			$key = $this->_resultSet->key();
		} else {
			$key = key ( $this->_resultSet );
		}
		$result = $this->_resultSet [$key];
		if (! $result instanceof User_Model_User) {
			$gateway = $this->getGateway();
			$result = $gateway->createUser ( $result );
			$this->_resultSet [$key] = $result;
		}
		return $result;
	}
	
	public function key() {
		return key ( $this ->_resultSet );
	}
	
	public function next() {
		return next ( $this->_resultSet );
	}
	
	public function rewind() {
		return reset ( $this->_resultSet );
	}
	
	public function valid() {
		return ( bool ) $this->current ();
	}

}