/**
* Dereference.
* Take inderect object, take $value member of this object (must be Zend_Pdf_Element),
* take reference to the $value member of this object and assign it to
* $value member of current PDF Reference object
* $obj can be null
*
* @throws Zend_Pdf_Exception
*/
private function _dereference()
{
if (($obj = $this->_factory->fetchObject($this->_objNum . ' ' . $this->_genNum)) === null) {
$obj = $this->_context->getParser()->getObject($this->_context->getRefTable()->getOffset($this->_objNum . ' ' . $this->_genNum . ' R'), $this->_context);
}
if ($obj === null) {
$this->_ref = new Zend_Pdf_Element_Null();
return;
}
if ($obj->toString() != $this->_objNum . ' ' . $this->_genNum . ' R') {
throw new Zend_Pdf_Exception('Incorrect reference to the object');
}
$this->_ref = $obj;
}
