Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/migrate/src/Exception/RequirementsException.php

@@ -0,0 +1,70 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\migrate\Exception\RequirementsException.
+ */
+
+namespace Drupal\migrate\Exception;
+
+use Exception;
+
+/**
+ * Defines an
+ *
+ * @see \Drupal\migrate\Plugin\RequirementsInterface
+ */
+class RequirementsException extends \RuntimeException {
+
+  /**
+   * The missing requirements.
+   *
+   * @var array
+   */
+  protected $requirements;
+
+  /**
+   * Constructs a new RequirementsException instance.
+   *
+   * @param string $message
+   *   (optional) The Exception message to throw.
+   * @param array $requirements
+   *   (optional) The missing requirements.
+   * @param int $code
+   *   (optional) The Exception code.
+   * @param \Exception $previous
+   *   (optional) The previous exception used for the exception chaining.
+   */
+  public function __construct($message = "", array $requirements = [], $code = 0, Exception $previous = NULL) {
+    parent::__construct($message, $code, $previous);
+
+    $this->requirements = $requirements;
+  }
+
+  /**
+   * Get an array of requirements.
+   *
+   * @return array
+   *   The requirements.
+   */
+  public function getRequirements() {
+    return $this->requirements;
+  }
+
+  /**
+   * Get the requirements as a string.
+   *
+   * @return string
+   *   A formatted requirements string.
+   */
+  public function getRequirementsString() {
+    $output = '';
+    foreach ($this->requirements as $requirement_type => $requirements) {
+      foreach ($requirements as $value) {
+        $output .= "$requirement_type: $value. ";
+      }
+    }
+    return trim($output);
+  }
+
+}