static void checkUserDefinedFileAttributes( Map<String, ByteBuffer> attrs1, Map<String, ByteBuffer> attrs2) { assert attrs1.size() == attrs2.size(); for (String name : attrs1.keySet()) { ByteBuffer bb1 = attrs1.get(name); ByteBuffer bb2 = attrs2.get(name); assertTrue(bb2 != null); assertTrue(bb1.equals(bb2)); } }