/**
* Dereference.
* Take inderect object, take $value member of this object (must be \ZendPdf\InternalType\AbstractTypeObject),
* take reference to the $value member of this object and assign it to
* $value member of current PDF Reference object
* $obj can be null
*
* @throws \ZendPdf\Exception\ExceptionInterface
*/
private function _dereference()
{
if (($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) {
$this->_ref = new NullObject();
return;
}
if ($obj->toString() != $this->_objNum . ' ' . $this->_genNum . ' R') {
throw new Exception\RuntimeException('Incorrect reference to the object');
}
$this->_ref = $obj;
}
/**
* Get header of free objects list
* Returns object number of last free object
*
* @throws \ZendPdf\Exception\ExceptionInterface
* @return integer
*/
public function getLastFreeObject()
{
try {
$this->_context->getRefTable()->getNextFree('0 65535 R');
} catch (Exception\ExceptionInterface $e) {
if ($e->getMessage() == 'Object not found.') {
/**
* Here is work around for some wrong generated PDFs.
* We have not found reference to the header of free object list,
* thus we treat it as there are no free objects.
*/
return 0;
}
throw $e;
}
}
