protected function _expandPaths()
{
$expanded = array();
foreach ($this->_paths as $path) {
if (preg_match('/[*.\\[\\]]/', $path)) {
$tree = $this->_generateTree($path);
$expanded = array_merge($expanded, $tree);
} else {
$expanded[] = $path;
}
}
$this->_paths = $expanded;
}