<?php

/**
 * Creation:     18.02.2007  fabian
 * Last Update:  $Id$
 *
 * Copyright (c) 2007 Fabian Wolter <fabian@eisfair.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

class VariableIndex extends Composite {
    private $pos;

    public function __construct($pos) {
        $this->pos = $pos;
    }

    public function getPos() {
        return $this->pos;
    }

    public function testPos($pos) {
        return $this->pos == $pos;
    }

    public function testPosInChildren($pos) {
        throw new Exception("Position in children of VariableIndex cannot be tested.");
    }

    public function testNameInChildren($name) {
        foreach($this->children as $child) {
            if($child->getName() === $name)
                return true;
        }
        return false;
    }

    public function testName($name) {
        throw new Exeption("VariableIndex has no Name attribute.");
    }

    public function getChildByPos($pos) {
        foreach($this->children as $child) {
            if($child->getPos() == $pos)
                return $child;
        }
        throw new Exception("No child with position '$pos' found.");
    }

    public function getChildByName($name) {
        foreach($this->children as $child) {
            if($child->getName() == $name)
                return $child;
        }
        throw new Exception("No child with name '$name' found.");
    }

    public function accept(Visitor $visitor, $level = 1) {
        $visitor->visit($this, $level++);

        foreach($this->children as $child) {
            $child->accept($visitor, $level);

        }
        $visitor->removeLastVariablePart();

    }
}

?>