ObjectAccessorNode.php

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<?php
namespace TYPO3\CMS\Fluid\Core\Parser\SyntaxTree;

/*                                                                        *
 * This script is backported from the TYPO3 Flow package "TYPO3.Fluid".   *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License, either version 3   *
 *  of the License, or (at your option) any later version.                *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

class ObjectAccessorNode extends \TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\AbstractNode
{
    protected $objectPath;

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

    public function getObjectPath()
    {
        return $this->objectPath;
    }

    public function evaluate(\TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface $renderingContext)
    {
        return self::getPropertyPath($renderingContext->getTemplateVariableContainer(), $this->objectPath, $renderingContext);
    }

    public static function getPropertyPath($subject, $propertyPath, \TYPO3\CMS\Fluid\Core\Rendering\RenderingContextInterface $renderingContext)
    {
        $propertyPathSegments = explode('.', $propertyPath);
        foreach ($propertyPathSegments as $pathSegment) {
            if ($subject === null || is_scalar($subject)) {
                return null;
            }
            $propertyExists = false;
            $propertyValue = \TYPO3\CMS\Extbase\Reflection\ObjectAccess::getPropertyInternal($subject, $pathSegment, false, $propertyExists);
            if ($propertyExists !== true && (is_array($subject) || $subject instanceof \ArrayAccess) && isset($subject[$pathSegment])) {
                $subject = $subject[$pathSegment];
            } else {
                $subject = $propertyValue;
            }
        }
        return $subject;
    }
}