+<?php
+
+namespace Drupal\block_content\Plugin\migrate\source\d7;
+
+use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
+
+/**
+ * Drupal 7 custom block source from database.
+ *
+ * @MigrateSource(
+ * id = "d7_block_custom"
+ * )
+ */
+class BlockCustom extends DrupalSqlBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function query() {
+ return $this->select('block_custom', 'b')->fields('b');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function fields() {
+ return [
+ 'bid' => $this->t('The numeric identifier of the block/box'),
+ 'body' => $this->t('The block/box content'),
+ 'info' => $this->t('Admin title of the block/box.'),
+ 'format' => $this->t('Input format of the custom block/box content.'),
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getIds() {
+ $ids['bid']['type'] = 'integer';
+ return $ids;
+ }
+
+}