protected function takeChildFromDOM($child)
 {
     $absoluteNodeName = $child->namespaceURI . ':' . $child->localName;
     switch ($absoluteNodeName) {
         case $this->lookupNamespace('gd') . ':' . 'when':
             $when = new Zend_Gdata_Extension_When();
             $when->transferFromDOM($child);
             $this->_when = $when;
             break;
         default:
             parent::takeChildFromDOM($child);
             break;
     }
 }

 protected function takeChildFromDOM($child)
 {
     $absoluteNodeName = $child->namespaceURI . ':' . $child->localName;
     switch ($absoluteNodeName) {
         case $this->lookupNamespace('gd') . ':' . 'where':
             $where = new Zend_Gdata_Extension_Where();
             $where->transferFromDOM($child);
             $this->_where[] = $where;
             break;
         case $this->lookupNamespace('gd') . ':' . 'when':
             $when = new Zend_Gdata_Extension_When();
             $when->transferFromDOM($child);
             $this->_when[] = $when;
             break;
         case $this->lookupNamespace('gd') . ':' . 'who':
             $who = new Zend_Gdata_Extension_Who();
             $who->transferFromDOM($child);
             $this->_who[] = $who;
             break;
         case $this->lookupNamespace('gd') . ':' . 'recurrence':
             $recurrence = new Zend_Gdata_Extension_Recurrence();
             $recurrence->transferFromDOM($child);
             $this->_recurrence = $recurrence;
             break;
         case $this->lookupNamespace('gd') . ':' . 'eventStatus':
             $eventStatus = new Zend_Gdata_Extension_EventStatus();
             $eventStatus->transferFromDOM($child);
             $this->_eventStatus = $eventStatus;
             break;
         case $this->lookupNamespace('gd') . ':' . 'comments':
             $comments = new Zend_Gdata_Extension_Comments();
             $comments->transferFromDOM($child);
             $this->_comments = $comments;
             break;
         case $this->lookupNamespace('gd') . ':' . 'transparency':
             $transparency = new Zend_Gdata_Extension_Transparency();
             $transparency->transferFromDOM($child);
             $this->_transparency = $transparency;
             break;
         case $this->lookupNamespace('gd') . ':' . 'visibility':
             $visiblity = new Zend_Gdata_Extension_Visibility();
             $visiblity->transferFromDOM($child);
             $this->_visibility = $visiblity;
             break;
         case $this->lookupNamespace('gd') . ':' . 'recurrenceException':
             require_once 'vendor/Zend/Gdata/Extension/RecurrenceException.php';
             $recurrenceException = new Zend_Gdata_Extension_RecurrenceException();
             $recurrenceException->transferFromDOM($child);
             $this->_recurrenceException[] = $recurrenceException;
             break;
         case $this->lookupNamespace('gd') . ':' . 'originalEvent':
             $originalEvent = new Zend_Gdata_Extension_OriginalEvent();
             $originalEvent->transferFromDOM($child);
             $this->_originalEvent = $originalEvent;
             break;
         case $this->lookupNamespace('gd') . ':' . 'extendedProperty':
             $extProp = new Zend_Gdata_Extension_ExtendedProperty();
             $extProp->transferFromDOM($child);
             $this->_extendedProperty[] = $extProp;
             break;
         case $this->lookupNamespace('gd') . ':' . 'entryLink':
             $entryLink = new Zend_Gdata_Extension_EntryLink();
             $entryLink->transferFromDOM($child);
             $this->_entryLink = $entryLink;
             break;
         default:
             parent::takeChildFromDOM($child);
             break;
     }
 }

 public function testExtensionAttributes()
 {
     $extensionAttributes = $this->when->extensionAttributes;
     $extensionAttributes['foo1'] = array('name' => 'foo1', 'value' => 'bar');
     $extensionAttributes['foo2'] = array('name' => 'foo2', 'value' => 'rab');
     $this->when->extensionAttributes = $extensionAttributes;
     $this->assertEquals('bar', $this->when->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $this->when->extensionAttributes['foo2']['value']);
     $whenXml = $this->when->saveXML();
     $newWhen = new Zend_Gdata_Extension_When();
     $newWhen->transferFromXML($whenXml);
     $this->assertEquals('bar', $newWhen->extensionAttributes['foo1']['value']);
     $this->assertEquals('rab', $newWhen->extensionAttributes['foo2']['value']);
 }