private function getFilenames()
    {
        $files = [];

        foreach ($this->filesets as $fileset) {
            $ds = $fileset->getDirectoryScanner($this->project);
            $ds->scan();

            $includedFiles = $ds->getIncludedFiles();

            foreach ($includedFiles as $file) {
                $fs = new PhingFile(basename($ds->getBaseDir()), $file);

                $files[] = $fs->getAbsolutePath();
            }
        }

        return $files;
    }