--- /dev/null
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Stdlib\Guard;
+
+use Traversable;
+
+/**
+ * Provide a guard method for array or Traversable data
+ */
+trait ArrayOrTraversableGuardTrait
+{
+ /**
+ * Verifies that the data is an array or Traversable
+ *
+ * @param mixed $data the data to verify
+ * @param string $dataName the data name
+ * @param string $exceptionClass FQCN for the exception
+ * @throws \Exception
+ */
+ protected function guardForArrayOrTraversable(
+ $data,
+ $dataName = 'Argument',
+ $exceptionClass = 'Zend\Stdlib\Exception\InvalidArgumentException'
+ ) {
+ if (! is_array($data) && ! ($data instanceof Traversable)) {
+ $message = sprintf(
+ "%s must be an array or Traversable, [%s] given",
+ $dataName,
+ is_object($data) ? get_class($data) : gettype($data)
+ );
+ throw new $exceptionClass($message);
+ }
+ }
+}