<?php
/**
 * Base object class for intermediate objects
 */
class BaseIntermediateObject
{
	protected $_value;
	protected $_dummy;

	/**
	 * Value stack
	 * @type array
	 */
	protected static $_stack = array();

	public function __construct($value=null)
	{
		$this->_value = $value;
		self::$_stack[] = $value;
	}

	public function setDummy($value)
	{
		$this->_dummy = $value;
		return $this;
	}

	public function getValue()
	{
		return $this->_value;
	}

	public static function getStack()
	{
		return self::$_stack;
	}

	/**
	 * Returns previous item from stack, used internally.
	 */
	protected static function _previousInStack()
	{
		$stackLength = count(self::$_stack);
		return self::$_stack[ ($stackLength - 2) ];
	}
}