<?php

/**
 * class Visitor
 */
abstract class Visitor {
    /**
     *
     * @param VariableInformation $ variableInformation
     */
    abstract public function visitVariableInformation(VariableInformation $variableInformation, $level);

    /**
     *
     * @param VariableValueTree $ variableValueTree
     */
    abstract public function visitVariableValueTree(VariableValueTree $variableValueTree, $level);

    /**
     * Visitor::visitVariableValue()
     *
     * @param VariableValue $variableValue
     * @param mixed $level
     * @return
     **/
    abstract public function visitVariableValue(VariableValue $variableValue, $level);

    /**
     *
     * @param VariableInformationTree $ variableInformationTree
     */
    abstract public function visitVariableInformationTree(VariableInformationTree $variableInformationTree, $level);

    /**
     *
     * @param Comment $ comment
     */
    abstract public function visitComment(Comment $comment, $level);

    abstract public function visitConfigTitle(ConfigTitle $configTitle, $level);

    abstract public function visitVariableIndex(VariableIndex $variableIndex, $level);

    abstract public function visitEmptyLine(EmptyLine $emptyLine, $level);

    public function removeLastVariablePart() {}

    /**
     * Visitor::visit()
     *
     * @param Component $comp
     * @param mixed $level
     * @return
     **/
    function visit(Component $comp, $level) {
        $method = "visit".get_class($comp);
        if (method_exists($this, $method)) {
            $this->$method($comp, $level);
        }
    }
} // end of Visitor

?>