/**
* Return the next Qualifier.
*
* @return object Qualifier
*
* @throws object HierarchyException An exception with one of
* the following messages defined in
* org.osid.hierarchy.HierarchyException may be thrown: {@link
* org.osid.hierarchy.HierarchyException#OPERATION_FAILED
* OPERATION_FAILED}, {@link
* org.osid.hierarchy.HierarchyException#PERMISSION_DENIED
* PERMISSION_DENIED}, {@link
* org.osid.hierarchy.HierarchyException#CONFIGURATION_ERROR
* CONFIGURATION_ERROR}, {@link
* org.osid.hierarchy.HierarchyException#UNIMPLEMENTED
* UNIMPLEMENTED}, {@link
* org.osid.hierarchy.HierarchyException#NO_MORE_ITERATOR_ELEMENTS
* NO_MORE_ITERATOR_ELEMENTS}
*
* @access public
*/
function next()
{
// If this is the first element access, inform our AZ cache that we are
// working with this set of nodes so that it can fetch AZs for all of
// them at once.
if ($this->_i == -1) {
$isAuthorizedCache = IsAuthorizedCache::instance();
$isAuthorizedCache->queueAssetArray($this->_elements);
}
return parent::next();
}
/**
* Answer the authorization cache used by this manager.
*
* WARNING: NOT IN OSID
*
* @return object IsAuthorizedCache
* @access public
* @since 4/21/08
*/
public function getIsAuthorizedCache()
{
return IsAuthorizedCache::instance();
}
/**
* This class implements the Singleton pattern. There is only ever
* one instance of the this class and it is accessed only via the
* ClassName::instance() method.
*
* @return object
* @access public
* @since 5/26/05
* @static
*/
public static function instance()
{
if (!isset(self::$instance)) {
self::$instance = new IsAuthorizedCache();
}
return self::$instance;
}
