public void writeObject(Object obj, Class... possibles) throws IOException { curDepth++; if (conf.isCrossPlatform()) { writeObjectInternal(obj, null); // not supported cross platform } if (possibles != null && possibles.length > 1) { for (int i = 0; i < possibles.length; i++) { Class possible = possibles[i]; codec.registerClass(possible); } } writeObjectInternal(obj, possibles); }