/**
* Parse a root object from a string
*
* @param string $stream
* @return RootObject
*/
public static function parse($stream)
{
$root = new self();
// Else, parse out any metadata and determine the root and parent object indices.
$root->setIndex(substr($stream, 0, strpos($stream, ' ')));
$stream = str_replace($root->getIndex() . ' 0 obj', '[{root_index}] 0 obj', $stream);
// Strip away any metadata
if (strpos($stream, '/Metadata') !== false) {
$metadata = substr($stream, strpos($stream, 'Metadata'));
$metadata = '/' . substr($metadata, 0, strpos($metadata, '/'));
$stream = str_replace($metadata, '', $stream);
}
// Determine the parent index.
$parent = substr($stream, strpos($stream, '/Pages') + 6);
$parent = trim(substr($parent, 0, strpos($parent, '0 R')));
$root->setParentIndex($parent);
$stream = str_replace('Pages ' . $root->getParentIndex() . ' 0 R', 'Pages [{parent_index}] 0 R', $stream);
// Set the root object parent index and the data.
$root->setData($stream . "\n");
return $root;
}
