manager.cpp

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/**
 * @file
 * @ingroup daq_config
 * @copyright (c) Copyright ESO 2022
 * All Rights Reserved
 * ESO (eso.org) is an Intergovernmental Organisation, and therefore special legal conditions apply.
 *
 * @brief daq::config::Manager and associated types.
 */
#include <daq/config/manager.hpp>
 
#include <ostream>
 
#include <boost/algorithm/string/join.hpp>
 
namespace daq::config {
 
std::ostream& operator<<(std::ostream& os, Origin origin) {
    switch (origin) {
    case Origin::Runtime:
        os << "Runtime";
        break;
    case Origin::CommandLine:
        os << "CommandLine";
        break;
    case Origin::Configuration:
        os << "Configuration";
        break;
    case Origin::EnvironmentVariable:
        os << "EnvironmentVariable";
        break;
    case Origin::Default:
        os << "Default";
        break;
    default:
        os << "Unknown";
        break;
    };
    return os;
}
 
 
std::ostream& operator<<(std::ostream& os, OriginInfo const& origin) {
    os << "origin: " << origin.origin << ", details: " << origin.description;
    return os;
}
 
std::optional<std::reference_wrapper<elt::configng::CiiConfigInstanceNode const>>
GetParam(std::string const& query, elt::configng::CiiConfigInstanceNode const& node) {
    if (query.empty()) {
        // A search in the form `/node/` was made which has a trailing slash
        return {};
    }
    auto pos = query.find('/');
    if (pos == std::string::npos) {
        // last node
        if (node.Has(query)) {
            return std::cref(node[query]);
        }
        return {};
    }
    auto next = query.substr(0, pos);
    auto next_query = query.substr(pos + 1, std::string::npos);
    if (!node.Has(next)) {
        return {};
    }
    return GetParam(next_query, node[next]);
}
 
}  // namespace daq::config