private function replaceToken($match, $migrate_executable, $row, $destination_property) {
    $tmp = str_replace("[", "", $match[2]);
    $tmp = str_replace("]", "", $tmp);
    $tmp = substr($tmp, 15);
    $uuid = $tmp;
    $output = '';

    try {
      if (!is_string($uuid)) {
        throw new MigrateException('Unable to grab UUID Link');
      }

      Database::setActiveConnection('source_migration');
      $db = Database::getConnection();
      $query = $db->select('node', 'n')
        ->fields('n')
        ->condition('n.uuid', $uuid);
      $nid = $query->execute()->fetchCol();
      Database::setActiveConnection();

      // Lookup the new Node.
      $nid = $this->migrationPlugin
        ->transform($nid[0], $migrate_executable, $row, $destination_property);

      if (is_array($nid)) {
        $nid = current($nid);
      }

      $node = Node::load($nid);
      if (!$node) {
        throw new MigrateException('Could not load node object');
      }

      // New link format.
      $attrBefore = !empty($match[1]) ? $match[1] : '';
      $attrAfter = !empty($match[3]) ? $match[3] : '';

      $output = '
        <a
          data-entity-substitution="canonical"
          data-entity-type="node"
          data-entity-uuid="' . $node->uuid() . '"
          href="/node/' . $nid . '" ' . $attrAfter . ' ' . $attrBefore . '>';
    }
    catch (Exception $e) {
      $msg = t('Unable to render link from %link. Error: %error', ['%link' => $uuid, '%error' => $e->getMessage()]);
      \Drupal::logger('Migration')->error($msg);
      return '';
    }
    return $output;
  }
private function replaceToken($match, $migrate_executable, $row, $destination_property) {
    $tmp = str_replace("[", "", $match[2]);
    $tmp = str_replace("]", "", $tmp);
    $tmp = substr($tmp, 15);
    $uuid = $tmp;
    $output = '';

    try {
      if (!is_string($uuid)) {
        throw new MigrateException('Unable to grab UUID Link');
      }

      Database::setActiveConnection('source_migration');
      $db = Database::getConnection();
      $query = $db->select('node', 'n')
        ->fields('n')
        ->condition('n.uuid', $uuid);
      $nid = $query->execute()->fetchCol();
      Database::setActiveConnection();

      // Lookup the new Node.
      $nid = $this->migrationPlugin
        ->transform($nid[0], $migrate_executable, $row, $destination_property);

      if (is_array($nid)) {
        $nid = current($nid);
      }

      $node = Node::load($nid);
      if (!$node) {
        throw new MigrateException('Could not load node object');
      }

      // New link format.
      $attrBefore = !empty($match[1]) ? $match[1] : '';
      $attrAfter = !empty($match[3]) ? $match[3] : '';

      $output = '
        <a
          data-entity-substitution="canonical"
          data-entity-type="node"
          data-entity-uuid="' . $node->uuid() . '"
          href="/node/' . $nid . '" ' . $attrAfter . ' ' . $attrBefore . '>';
    }
    catch (Exception $e) {
      $msg = t('Unable to render link from %link. Error: %error', ['%link' => $uuid, '%error' => $e->getMessage()]);
      \Drupal::logger('Migration')->error($msg);
      return '';
    }
    return $output;
  }
private function replaceToken ( $ match , $ migrate_executable , $ row , $ destination_property ) { $ tmp = str_replace ( "[" , "" , $ match [ 2 ] ) ; $ tmp = str_replace ( "]" , "" , $ tmp ) ; $ tmp = substr ( $ tmp , 15 ) ; $ uuid = $ tmp ; $ output = '' ; try { if ( ! is_string ( $ uuid ) ) { throw new MigrateException ( 'Unable to grab UUID Link' ) ; } Database :: setActiveConnection ( 'source_migration' ) ; $ db = Database :: getConnection ( ) ; $ query = $ db -> select ( 'node' , 'n' ) -> fields ( 'n' ) -> condition ( 'n.uuid' , $ uuid ) ; $ nid = $ query -> execute ( ) -> fetchCol ( ) ; Database :: setActiveConnection ( ) ; // Lookup the new Node. $ nid = $ this -> migrationPlugin -> transform ( $ nid [ 0 ] , $ migrate_executable , $ row , $ destination_property ) ; if ( is_array ( $ nid ) ) { $ nid = current ( $ nid ) ; } $ node = Node :: load ( $ nid ) ; if ( ! $ node ) { throw new MigrateException ( 'Could not load node object' ) ; } // New link format. $ attrBefore = ! empty ( $ match [ 1 ] ) ? $ match [ 1 ] : '' ; $ attrAfter = ! empty ( $ match [ 3 ] ) ? $ match [ 3 ] : '' ; $ output = '
        <a
          data-entity-substitution="canonical"
          data-entity-type="node"
          data-entity-uuid="' . $ node -> uuid ( ) . '"
          href="/node/' . $ nid . '" ' . $ attrAfter . ' ' . $ attrBefore . '>' ; } catch ( Exception $ e ) { $ msg = t ( 'Unable to render link from %link. Error: %error' , [ '%link' => $ uuid , '%error' => $ e -> getMessage ( ) ] ) ; \ Drupal :: logger ( 'Migration' ) -> error ( $ msg ) ; return '' ; } return $ output ; }
Replace callback to convert a Drupal 7 UUID link into a Drupal 8 UUID Link.

@param string $match
Takes a match of tag code
@param \Drupal\migrate\MigrateExecutableInterface $migrate_executable
The migrate executable helper class.
@param \Drupal\migrate\Row $row
The current row after processing.
@param string $destination_property
The destination propery.
Replace callback to convert a Drupal 7 UUID link into a Drupal 8 UUID Link .