本文整理汇总了C++中config::is_null方法的典型用法代码示例。如果您正苦于以下问题：C++ config::is_null方法的具体用法？C++ config::is_null怎么用？C++ config::is_null使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类config的用法示例。
在下文中一共展示了config::is_null方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: JUBATUS_EXCEPTION
shared_ptr<recommender_base> recommender_factory::create_recommender(
const string& name,
const config& param,
const string& id) {
if (name == "inverted_index") {
if (!param.is_null()) {
inverted_index_config conf =
config_cast_check<inverted_index_config>(param);
if (conf.unlearner) {
if (!conf.unlearner_parameter) {
throw JUBATUS_EXCEPTION(
common::config_exception() << common::exception::error_message(
"unlearner is set but unlearner_parameter is not found"));
}
return shared_ptr<recommender_base>(
new inverted_index(unlearner::create_unlearner(
*conf.unlearner, common::jsonconfig::config(
*conf.unlearner_parameter))));
} else {
if (conf.unlearner_parameter) {
throw JUBATUS_EXCEPTION(
common::config_exception() << common::exception::error_message(
"unlearner_parameter is set but unlearner is not found"));
}
}
}
return shared_ptr<recommender_base>(new inverted_index);
} else if (name == "inverted_index_euclid") {
if (!param.is_null()) {
return shared_ptr<recommender_base>(
new inverted_index_euclid(
config_cast_check<inverted_index_euclid::config>(param)));
} else {
return shared_ptr<recommender_base>(new inverted_index_euclid);
}
} else if (name == "minhash") {
return shared_ptr<recommender_base>(
new minhash(config_cast_check<minhash::config>(param)));
} else if (name == "lsh") {
return shared_ptr<recommender_base>(
new lsh(config_cast_check<lsh::config>(param)));
} else if (name == "euclid_lsh") {
return shared_ptr<recommender_base>(
new euclid_lsh(config_cast_check<euclid_lsh::config>(param)));
} else if (name == "nearest_neighbor_recommender") {
nearest_neighbor_recommender_config conf =
config_cast_check<nearest_neighbor_recommender_config>(param);
shared_ptr<storage::column_table> table(new storage::column_table);
shared_ptr<nearest_neighbor::nearest_neighbor_base>
nearest_neighbor_engine(nearest_neighbor::create_nearest_neighbor(
conf.method, conf.parameter, table, id));
if (conf.unlearner) {
if (!conf.unlearner_parameter) {
throw JUBATUS_EXCEPTION(
common::config_exception() << common::exception::error_message(
"unlearner is set but unlearner_parameter is not found"));
}
shared_ptr<unlearner::unlearner_base> unl(unlearner::create_unlearner(
*conf.unlearner, common::jsonconfig::config(
*conf.unlearner_parameter)));
return shared_ptr<recommender_base>(
new nearest_neighbor_recommender(nearest_neighbor_engine, unl));
}
return shared_ptr<recommender_base>(
new nearest_neighbor_recommender(nearest_neighbor_engine));
} else {
throw JUBATUS_EXCEPTION(common::unsupported_method(name));
}
}