<?php
/**
 * PHP Command Line Tools
 *
 * This source file is subject to the MIT license that is bundled
 * with this package in the file LICENSE.
 *
 * @author    James Logsdon <[email protected]>
 * @copyright 2010 James Logsdom (http://girsbrain.org)
 * @license   http://www.opensource.org/licenses/mit-license.php The MIT License
 */

namespace cli;

abstract class Memoize {
    protected $_memoCache = array();

    public function __get($name) {
        if (isset($this->_memoCache[$name])) {
            return $this->_memoCache[$name];
        }

        // Hide probable private methods
        if (0 == strncmp($name, '_', 1)) {
            return ($this->_memoCache[$name] = null);
        }

        if (!method_exists($this, $name)) {
            return ($this->_memoCache[$name] = null);
        }

        $method = array($this, $name);
        ($this->_memoCache[$name] = call_user_func($method));
        return $this->_memoCache[$name];
    }

    protected function _unmemo($name) {
        if ($name === true) {
            $this->_memoCache = array();
        } else {
            unset($this->_memoCache[$name]);
        }
    }
}