}else if(type.isEnum()){
writers[i] = new EnumWriter(f);
}else if(type == boolean.class){
writers[i] = new BitWriter(f);
}else if(type == long.class){
writers[i] = new LongWriter(f);
}else if(type == String.class){
writers[i] = new StringWriter(f);
}else if (type == Timestamp.class) {
writers[i] = new NTimeStampWriter(f);
}else{