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system/Filters/Exceptions/FilterException.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Filters\Exceptions;
+
+use CodeIgniter\Exceptions\ConfigException;
+use CodeIgniter\Exceptions\ExceptionInterface;
+
+/**
+ * FilterException
+ */
+class FilterException extends ConfigException implements ExceptionInterface
+{
+    /**
+     * Thrown when the provided alias is not within
+     * the list of configured filter aliases.
+     *
+     * @return static
+     */
+    public static function forNoAlias(string $alias)
+    {
+        return new static(lang('Filters.noFilter', [$alias]));
+    }
+
+    /**
+     * Thrown when the filter class does not implement FilterInterface.
+     *
+     * @return static
+     */
+    public static function forIncorrectInterface(string $class)
+    {
+        return new static(lang('Filters.incorrectInterface', [$class]));
+    }
+}