FilterUtility.php

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<?php
namespace TYPO3\CMS\Form\Utility;

class FilterUtility implements \TYPO3\CMS\Form\Filter\FilterInterface {

    protected $filters = array();

    public function __construct() {
        $removeXssFilter = $this->makeFilter('removeXss');
        $this->addFilter($removeXssFilter);
    }

    public function addFilter(\TYPO3\CMS\Form\Filter\FilterInterface $filter) {
        $this->filters[] = $filter;
        return $this;
    }

    public function makeFilter($class, array $arguments = NULL) {
        return self::createFilter($class, $arguments);
    }

    public function filter($value) {
        if (!empty($this->filters)) {
            foreach ($this->filters as $filter) {
                $value = $filter->filter($value);
            }
        }
        return $value;
    }

    static public function get($class, $value, array $arguments = array()) {
        return self::createFilter($class, $arguments)->filter($value);
    }

    static public function createFilter($class, array $arguments = NULL) {
        $class = strtolower((string) $class);
        $className = 'TYPO3\\CMS\\Form\\Filter\\' . ucfirst($class) . 'Filter';
        if (is_null($arguments)) {
            $filter = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance($className);
        } else {
            $filter = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance($className, $arguments);
        }
        return $filter;
    }

}