public static void loadPermissions(URL url) throws IOException, PermissionParseException {
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
String line;
Pattern ignore = Pattern.compile("^\\s*(//.*)?$");
Pattern valid =
Pattern.compile("^\\s*permission\\s+(\\S+)" + "(\\s+\"([^\"]*)\"(,\\s+\"([^\"]*)\")?)?;$");
Set<Permission> perms = new HashSet<Permission>();
while ((line = in.readLine()) != null) {
if (ignore.matcher(line).matches()) {
continue;
}
Matcher matcher = valid.matcher(line);
if (!matcher.matches()) {
throw new PermissionParseException("invalid syntax: " + line);
}
int nGroups = matcher.groupCount();
String type = matcher.group(1);
String name = expand(nGroups >= 3 ? matcher.group(3) : null);
String actions = expand(nGroups >= 5 ? matcher.group(5) : null);
try {
Permission perm = getPermission(type, name, actions);
perms.add(perm);
} catch (Throwable e) {
String message =
String.format(
"could not instantiate permission: " + "type=%s name=%s actions=",
type, name, actions);
throw new PermissionParseException(message, e);
}
}
in.close();
permSet.addAll(perms);
}
