Update to Drupal 8.0.0-beta15. For more information, see: https://www.drupal.org/node/2563023

core/modules/text/src/Plugin/migrate/cckfield/TextField.php

@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\text\Plugin\migrate\cckfield\TextField.
+ */
+
+namespace Drupal\text\Plugin\migrate\cckfield;
+
+use Drupal\migrate\Entity\MigrationInterface;
+use Drupal\migrate_drupal\Plugin\migrate\cckfield\CckFieldPluginBase;
+
+/**
+ * @PluginID("text")
+ */
+class TextField extends CckFieldPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldWidgetMap() {
+    return [
+      'text_textfield' => 'text_textfield',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldFormatterMap() {
+    return [
+      'default' => 'text_default',
+      'trimmed' => 'text_trimmed',
+      'plain' => 'basic_string',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function processCckFieldValues(MigrationInterface $migration, $field_name, $data) {
+    $process = array(
+      array(
+        'plugin' => 'iterator',
+        'source' => $field_name,
+        // See \Drupal\migrate_drupal\Plugin\migrate\source\d6\User::baseFields(),
+        // signature_format for an example of the YAML that represents this
+        // process array.
+        'process' => [
+          'value' => 'value',
+          'format' => [
+            [
+              'plugin' => 'static_map',
+              'bypass' => TRUE,
+              'source' => 'format',
+              'map' => [0 => NULL],
+            ],
+            [
+              'plugin' => 'skip_on_empty',
+              'method' => 'process',
+            ],
+            [
+              'plugin' => 'migration',
+              'migration' => 'd6_filter_format',
+              'source' => 'format',
+            ],
+          ],
+        ],
+      ),
+    );
+    $migration->setProcessOfProperty($field_name, $process);
+  }
+
+}