<?php
  /**
   * Zend Framework
   *
   * LICENSE
   *
   * This source file is subject to the new BSD license that is bundled
   * with this package in the file LICENSE.txt.
   * It is also available through the world-wide-web at this URL:
   * http://framework.zend.com/license/new-bsd
   * If you did not receive a copy of the license and are unable to
   * obtain it through the world-wide-web, please send an email
   * to license@zend.com so we can send you a copy immediately.
   *
   * @category   Zend
   * @package    Zend_Pdf
   * @subpackage Actions
   * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
   * @license    http://framework.zend.com/license/new-bsd     New BSD License
   * @version    $Id: Target.php 24593 2012-01-05 20:35:02Z matthew $
   */
  
  
  /**
   * PDF target (action or destination)
   *
   * @package    Zend_Pdf
   * @subpackage Actions
   * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
   * @license    http://framework.zend.com/license/new-bsd     New BSD License
   */
  abstract class Zend_Pdf_Target
  {
      /**
       * Parse resource and return it as an Action or Explicit Destination
       *
       * $param Zend_Pdf_Element $resource
       * @return Zend_Pdf_Destination|
       * @throws Zend_Pdf_Exception
       */
      public static function load(Zend_Pdf_Element $resource) {
          require_once 'Zend/Pdf/Element.php';
          if ($resource->getType() == Zend_Pdf_Element::TYPE_DICTIONARY) {
              if (($resource->Type === null  ||  $resource->Type->value =='Action')  &&  $resource->S !== null) {
                  // It's a well-formed action, load it
                  require_once 'Zend/Pdf/Action.php';
                  return Zend_Pdf_Action::load($resource);
              } else if ($resource->D !== null) {
                  // It's a destination
                  $resource = $resource->D;
              } else {
                  require_once 'Zend/Pdf/Exception.php';
                  throw new Zend_Pdf_Exception('Wrong resource type.');
              }
          }
  
          if ($resource->getType() == Zend_Pdf_Element::TYPE_ARRAY  ||
              $resource->getType() == Zend_Pdf_Element::TYPE_NAME   ||
              $resource->getType() == Zend_Pdf_Element::TYPE_STRING) {
              // Resource is an array, just treat it as an explicit destination array
              require_once 'Zend/Pdf/Destination.php';
              return Zend_Pdf_Destination::load($resource);
          } else {
              require_once 'Zend/Pdf/Exception.php';
              throw new Zend_Pdf_Exception( 'Wrong resource type.' );
          }
      }
  
      /**
       * Get resource
       *
       * @internal
       * @return Zend_Pdf_Element
       */
      abstract public function getResource();
  }