| 1 | <?php
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| 2 | //----------------------------------------------------------------------------------
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| 3 | // Class: IteratorAllGraphsDb
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| 4 | //----------------------------------------------------------------------------------
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| 5 |
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| 6 |
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| 7 | /**
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| 8 | * Implementation of a Graph iterator.
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| 9 | *
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| 10 | * This Iterator should be used in a for-loop like:
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| 11 | * for($iterator = $dataset->listGraphs(); $iterator->valid(); $iterator->next())
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| 12 | * {
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| 13 | * $currentResource=$iterator->current();
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| 14 | * };
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| 15 | *
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| 16 | * @version $Id$
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| 17 | * @author Daniel Westphal <mail at d-westphal dot de>
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| 18 | *
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| 19 | *
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| 20 | * @package dataset
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| 21 | * @access public
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| 22 | **/
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| 23 | class IteratorAllGraphsDb
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| 24 | {
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| 25 | /**
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| 26 | * Holds a reference to the associated DB resultSet
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| 27 | * @var $dbResultSets ADODB result
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| 28 | * @access private
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| 29 | */
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| 30 | var $dbResultSet;
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| 31 |
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| 32 | /**
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| 33 | * Holds a reference to the associated datasetDb
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| 34 | * @var datasetDb
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| 35 | * @access private
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| 36 | */
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| 37 | var $datasetDb;
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| 38 |
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| 39 |
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| 40 | /**
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| 41 | * The current position
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| 42 | * @var integer
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| 43 | * @access private
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| 44 | */
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| 45 | var $key;
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| 46 |
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| 47 |
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| 48 | /**
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| 49 | * The current NamedGraph
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| 50 | * @var obejct NamedGraph
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| 51 | * @access private
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| 52 | */
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| 53 | var $current;
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| 54 |
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| 55 |
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| 56 |
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| 57 | /**
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| 58 | * Constructor.
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| 59 | *
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| 60 | *
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| 61 | * @param ADODBResultSet
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| 62 | * @param DatasetDb
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| 63 | * @access public
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| 64 | */
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| 65 | function IteratorAllGraphsDb(&$dbResultSet,&$datasetDb)
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| 66 | {
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| 67 | $this->dbResultSet=& $dbResultSet;
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| 68 | $this->datasetDb=& $datasetDb;
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| 69 | $this->current = $this->dbResultSet->fields[0];
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| 70 | }
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| 71 |
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| 72 | /**
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| 73 | * Resets iterator list to start
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| 74 | *
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| 75 | * @access public
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| 76 | */
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| 77 | function rewind()
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| 78 | {
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| 79 | //not supported
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| 80 | }
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| 81 |
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| 82 | /**
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| 83 | * Says if there are additional items left in the list
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| 84 | *
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| 85 | * @return boolean
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| 86 | * @access public
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| 87 | */
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| 88 | function valid()
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| 89 | {
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| 90 | return (!$this->dbResultSet->EOF);
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| 91 | }
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| 92 |
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| 93 | /**
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| 94 | * Moves Iterator to the next item in the list
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| 95 | *
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| 96 | * @access public
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| 97 | */
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| 98 | function next()
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| 99 | {
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| 100 | $this->dbResultSet->moveNext();
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| 101 | $this->current = $this->dbResultSet->fields[0];
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| 102 | }
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| 103 |
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| 104 | /**
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| 105 | * Returns the current item
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| 106 | *
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| 107 | * @return mixed
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| 108 | * @access public
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| 109 | */
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| 110 | function ¤t()
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| 111 | {
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| 112 | return ($this->datasetDb->getNamedGraph($this->current));
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| 113 | }
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| 114 |
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| 115 |
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| 116 | /**
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| 117 | * Returns the key of the current item
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| 118 | *
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| 119 | * @return integer
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| 120 | * @access public
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| 121 | */
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| 122 | function key()
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| 123 | {
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| 124 | return $this->dbResultSet->_currentRow;
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| 125 | }
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| 126 | }
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| 127 | ?> |
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