/**
* Processes the pdf using the input and output that have been set.
*/
public function process()
{
if (null !== $this->cache) {
$contents = $this->input->process();
if (!($output = $this->cache->load(md5($contents)))) {
$this->cache->save($output = $this->output->process($contents, $this->generator));
}
} else {
$output = $this->output->process($this->input->process(), $this->generator);
}
return $output;
}
