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system/Validation/Exceptions/ValidationException.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\Validation\Exceptions;
+
+use CodeIgniter\Exceptions\FrameworkException;
+
+class ValidationException extends FrameworkException
+{
+    public static function forRuleNotFound(?string $rule = null)
+    {
+        return new static(lang('Validation.ruleNotFound', [$rule]));
+    }
+
+    public static function forGroupNotFound(?string $group = null)
+    {
+        return new static(lang('Validation.groupNotFound', [$group]));
+    }
+
+    public static function forGroupNotArray(?string $group = null)
+    {
+        return new static(lang('Validation.groupNotArray', [$group]));
+    }
+
+    public static function forInvalidTemplate(?string $template = null)
+    {
+        return new static(lang('Validation.invalidTemplate', [$template]));
+    }
+
+    public static function forNoRuleSets()
+    {
+        return new static(lang('Validation.noRuleSets'));
+    }
+}