Source for file IteratorAllGraphsMem.php

Documentation is available at IteratorAllGraphsMem.php

  1. <?php 
  2. // ----------------------------------------------------------------------------------
  3. // Class: IteratorAllGraphsMem
  4. // ----------------------------------------------------------------------------------
  5.  
  6.  
  7. /**
  8. * Implementation of a Graph iterator.
  9. *
  10. * This Iterator should be used in a for-loop like:
  11. * for($iterator = $dataset->listGraphs(); $iterator->valid(); $iterator->next())
  12. * {
  13. *    $currentResource=$it->current();
  14. * };
  15. *
  16. * @version  $Id: fsource_dataset__datasetIteratorAllGraphsMem.php.html 442 2007-06-01 16:19:26Z cax $
  17. * @author Daniel Westphal <mail at d-westphal dot de>
  18. *
  19. *
  20. * @package     dataset
  21. * @access    public
  22. ***/
  23. class IteratorAllGraphsMem
  24. {
  25.     /**
  26.     * Holds a reference to the associated RDF dataset
  27.     *
  28.     * @var        object dataset 
  29.     * @access    private
  30.     */
  31.     var $associatedGraphSet;
  32.     
  33.     /**
  34.     * The current position
  35.     *
  36.     * @var        integer 
  37.     * @access    private
  38.     */
  39.     var $key;
  40.     
  41.     /**
  42.     * If the current resource is valid
  43.     *
  44.     * @var        boolean 
  45.     * @access    private
  46.     */
  47.     var $valid;
  48.     
  49.     /**
  50.     * The current NamedGraph
  51.     *
  52.     * @var obejct NamedGraph
  53.     * @access    private
  54.     */
  55.     var $current;
  56.     
  57.     
  58.     /**
  59.     * Constructor.
  60.     *
  61.     * @param dataset 
  62.     * @access    public
  63.     */
  64.     function IteratorAllGraphsMem(&$namedGraphSet)
  65.     {
  66.         $this->associatedGraphSet=&$namedGraphSet;
  67.         $this->rewind();
  68.     }
  69.     
  70.     /**
  71.     * Resets iterator list to start
  72.     *
  73.     * @access public
  74.     */
  75.     function rewind()
  76.     {
  77.         $this->key = -1;
  78.         $this->next();
  79.     }
  80.     
  81.     /**
  82.     * Says if there are additional items left in the list.
  83.     *
  84.     * @return    boolean 
  85.     * @access    public
  86.     */
  87.     function valid()
  88.     {
  89.         return $this->valid;
  90.     }
  91.     
  92.     /**
  93.     * Moves Iterator to the next item in the list.
  94.     *
  95.     * @access    public
  96.     */
  97.     function next()
  98.     {
  99.         $this->current = &$this->associatedGraphSet->getGraphWithOffset(++$this->key);
  100.         $this->valid=($this->current!=NULL);
  101.     }
  102.     
  103.     /**
  104.     * Returns the current item.
  105.     *
  106.     * @return    mixed 
  107.     * @access    public
  108.     */
  109.     function &current()
  110.     {
  111.         return $this->current;
  112.     }
  113.     
  114.     /**
  115.     * Returns the key of the current item.
  116.     *
  117.     * @return    integer 
  118.     * @access    public
  119.     */
  120.     function key()
  121.     {
  122.         return $this->key;
  123.     }
  124. }
  125. ?>

Documentation generated on Fri, 1 Jun 2007 16:49:34 +0200 by phpDocumentor 1.3.2