if (isReadOnly()) throw new SecurityException("readonly"); if (!(permission instanceof PropertyPermission)) throw new IllegalArgumentException();
if (isReadOnly()) { throw new SecurityException("readonly"); } if (!(permission instanceof PropertyPermission)) { throw new IllegalArgumentException(); }
    public void add(Permission permission) {        if (isReadOnly()) throw new SecurityException("readonly");        if (!(permission instanceof PropertyPermission))                throw new IllegalArgumentException();        PropertyPermission pp = (PropertyPermission) permission;        String name = pp.getName();        if (name.equals("*")) all_allowed = true;        PropertyPermission old = (PropertyPermission) permissions.get(name);        if (old != null) {            if ((pp.actions | old.actions) == old.actions)                pp = old; // Old implies pp.            else if ((pp.actions | old.actions) != pp.actions)             // Here pp doesn't imply old; the only case left is both actions.                    pp = new PropertyPermission(name, "read,write");        }        permissions.put(name, pp);    }