/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#include "Sealable.h"

#include <stdexcept>

namespace facebook {
namespace react {

/*
 * Note:
 * We must explictly implement all *the rule of five* methods because:
 *   1. Using `std::atomic` behind `sealed_` implicitly deletes default
 *      constructors;
 *   2. We have to establish behaviour where any new cloned or moved instances
 *      of the object lose `sealed` flag.
 *
 * See more about the rule of three/five/zero:
 * http://en.cppreference.com/w/cpp/language/rule_of_three
 */

Sealable::Sealable(): sealed_(false) {}

Sealable::Sealable(const Sealable& other): sealed_(false) {};

Sealable::Sealable(Sealable&& other) noexcept: sealed_(false) {};

Sealable::~Sealable() noexcept {};

Sealable& Sealable::operator= (const Sealable& other) {
  ensureUnsealed();
  return *this;
}

Sealable& Sealable::operator= (Sealable&& other) noexcept {
  ensureUnsealed();
  return *this;
};

void Sealable::seal() const {
  sealed_ = true;
}

bool Sealable::getSealed() const {
  return sealed_;
}

void Sealable::ensureUnsealed() const {
  if (sealed_) {
    throw std::runtime_error("Attempt to mutate a sealed object.");
  }
}

} // namespace react
} // namespace facebook