<?php

/**
 * class VariableInformationTree
 * Siehe vererbte Klasse. Objekte dieser Klasse werden im InformationTree
 * verwendet.
 */

class VariableInformationTree extends Composite {
    private $name;

    public function __construct($name = null) {
        $this->name = $name;
    }

    /**
     * VariableInformationTree::getName()
     *
     * @return
     */
    public function getName() {
        return $this->name;
    }

    /**
     * VariableInformationTree::getChildByName()
     *
     * @param mixed $name
     * @return
     */
    public function getChildByName($name) {
        foreach($this->children as $child) {
            if($child instanceof VariableInformationTree && $child->getName() == $name)
                return $child;
        }
        throw new Exception("No child with name '$name' found.");
    }

    /**
     * VariableInformationTree::isName()
     *
     * @param mixed $name
     * @return
     */
    public function testNameInChildren($name) {
        if($this->getChildByName($name) === false)
            return false;
        else
            return true;
    }

    public function isName($name) {
    	return $this->name == $name;
    }

    public function getPos($pos) {
    	throw new Exception(__CLASS__." has no positions.");
    }

    public function getPosInChildren($pos) {
    	throw new Exception(__CLASS__." has no positions.");
    }

    /**
     * VariableInformationTree::accept()
     *
     * @param Visitor $visitor
     * @return
     */
    public function accept(Visitor $visitor, $level = 1) {
        $visitor->visit($this, $level++);
        foreach($this->children as $child) {
            $child->accept($visitor, $level);
        }
    } // end of member function accept
} // end of VariableInformationTree

?>