jpSimpleMail wrapper class

<?php
class jpSimpleMail {
  public $mailer;
  public $message;

  public static function create($mailer) {
    return new static();
  }

  public function __construct() {
  }

  public function getMailer() {
    if ($this->mailer !== null) {
      return $this->mailer;
    }

    $this->mailer = sfContext::getInstance()->getMailer();
    return $this->mailer;
  }

  public function getMessage() {
    if ($this->message !== null) {
      return $this->message;
    }

    $this->message = Swift_Message::newInstance()
      ->setCharset('iso-2022-jp')
      ->setEncoder(new Swift_Mime_ContentEncoder_PlainContentEncoder('7bit'));
    return $this->message;
  }

  public function addTo($to) {
    $this->getMessage()->setTo($this->createArrayAddress($to));

    return $this;
  }

  public function setBody($body, $contentType = null) {
    $this->getMessage()->setBody($body, $contentType);

    return $this;
  }

  public function setFrom($from) {
    $this->getMessage()->setFrom($this->createArrayAddress($from));

    return $this;
  }

  public function setSender($sender) {
    $this->getMessage()->setSender($sender);

    return $this;
  }

  public function setSubject($subject) {
    $subject = mb_convert_encoding($subject, 'iso-2022-jp', 'utf-8');
    $this->getMessage()->setSubject($subject);

    return $this;
  }

  public function send() {
    return $this->getMailer()->send($this->getMessage());
  }

  protected function createArrayAddress($addr) {
    if (preg_match('/(.*)<(.*)>/', $addr, $matches)) {
      $address = trim($matches[2]);
      $title = mb_encode_mimeheader(
        trim($matches[1]),
        'iso-2022-jp',
        'B',
        "\r\n"
      );
      return array($address => $title);
    } else {
      return $addr;
    }
  }
}