std::string
get(const std::string& name, const dynamic_properties& dp, const Key& key)
{
  for (dynamic_properties::const_iterator i = dp.lower_bound(name);
       i != dp.end() && i->first == name; ++i) {
    if (i->second->key() == typeid(key))
      return i->second->get_string(key);
  }

  BOOST_THROW_EXCEPTION(dynamic_get_failure(name));
}

Value
get(const std::string& name, const dynamic_properties& dp, const Key& key, type<Value>)
{
  for (dynamic_properties::const_iterator i = dp.lower_bound(name);
       i != dp.end() && i->first == name; ++i) {
    if (i->second->key() == typeid(key))
      return any_cast<Value>(i->second->get(key));
  }

  throw dynamic_get_failure(name);
}

bool
put(const std::string& name, dynamic_properties& dp, const Key& key,
    const Value& value)
{
  for (dynamic_properties::iterator i = dp.lower_bound(name);
       i != dp.end() && i->first == name; ++i) {
    if (i->second->key() == typeid(key)) {
      i->second->put(key, value);
      return true;
    }
  }

  boost::shared_ptr<dynamic_property_map> new_map = dp.generate(name, key, value);
  if (new_map.get()) {
    new_map->put(key, value);
    dp.insert(name, new_map);
    return true;
  } else {
    return false;
  }
}