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  1. <?php
  2. /**
  3. * Zend Framework
  4. *
  5. * LICENSE
  6. *
  7. * This source file is subject to the new BSD license that is bundled
  8. * with this package in the file LICENSE.txt.
  9. * It is also available through the world-wide-web at this URL:
  10. * http://framework.zend.com/license/new-bsd
  11. * If you did not receive a copy of the license and are unable to
  12. * obtain it through the world-wide-web, please send an email
  13. * to license@zend.com so we can send you a copy immediately.
  14. *
  15. * @category Zend
  16. * @package Zend_Pdf
  17. * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
  18. * @license http://framework.zend.com/license/new-bsd New BSD License
  19. * @version $Id$
  20. */
  21. /** Zend_Pdf_Element */
  22. // require_once 'Zend/Pdf/Element.php';
  23. /**
  24. * PDF file 'null' element implementation
  25. *
  26. * @category Zend
  27. * @package Zend_Pdf
  28. * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
  29. * @license http://framework.zend.com/license/new-bsd New BSD License
  30. */
  31. class Zend_Pdf_Element_Null extends Zend_Pdf_Element
  32. {
  33. /**
  34. * Object value. Always null.
  35. *
  36. * @var mixed
  37. */
  38. public $value;
  39. /**
  40. * Object constructor
  41. */
  42. public function __construct()
  43. {
  44. $this->value = null;
  45. }
  46. /**
  47. * Return type of the element.
  48. *
  49. * @return integer
  50. */
  51. public function getType()
  52. {
  53. return Zend_Pdf_Element::TYPE_NULL;
  54. }
  55. /**
  56. * Return object as string
  57. *
  58. * @param Zend_Pdf_Factory $factory
  59. * @return string
  60. */
  61. public function toString($factory = null)
  62. {
  63. return 'null';
  64. }
  65. }