Settings.h

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/*
* Copyright Onix Solutions Limited [OnixS]. All rights reserved.
*
* This software owned by Onix Solutions Limited [OnixS] and is protected by copyright law
* and international copyright treaties.
*
* Access to and use of the software is governed by the terms of the applicable OnixS Software
* Services Agreement (the Agreement) and Customer end user license agreements granting
* a non-assignable, non-transferable and non-exclusive license to use the software
* for it's own data processing purposes under the terms defined in the Agreement.
*
* Except as otherwise granted within the terms of the Agreement, copying or reproduction of any part
* of this source code or associated reference material to any other location for further reproduction
* or redistribution, and any amendments to this copyright notice, are expressly prohibited.
*
* Any reproduction or redistribution for sale or hiring of the Software not in accordance with
* the terms of the Agreement is a violation of copyright law.
*/
#pragma once
 
#include <OnixS/ICE/BOE/utils/ConfigurationParser.h>
#include <string>
 
namespace Samples {
 
using namespace ONIXS_ICEBOE_NAMESPACE;
 
class Settings
{
public:
    Settings() = default;
 
    Settings(const std::string& filename)
        : map_(System::ConfigurationParser::parseConfigFile(filename, "TradingClient"))
    {
    }
 
    template<typename T = std::string>
    T get(const std::string& key, typename std::enable_if<std::is_integral<T>::value, void*>::type = nullptr) const
    {
        return System::ConfigurationParser::Utils::fromString<T>((getAsStr(key)));
    }
 
    template<typename T = std::string>
    T get(const std::string& key, T defaultValue, typename std::enable_if<std::is_integral<T>::value, void*>::type = nullptr) const
    {
        const auto v = getIfAny(key);
        return v.empty() ? defaultValue : System::ConfigurationParser::Utils::fromString<T>(v);
    }
 
    template<typename T = std::string>
    T get(const std::string& key, typename std::enable_if<std::is_same<T, std::string>::value, void*>::type = nullptr) const
    {
        return getAsStr(key);
    }
 
    template<typename T = std::string>
    T get(const std::string& key, T defaultValue, typename std::enable_if<std::is_same<T, std::string>::value, void*>::type = nullptr) const
    {
        return getAsStr(key, defaultValue);
    }
 
    template<typename T = std::string>
    T get(const std::string& key, typename std::enable_if<std::is_same<T, bool>::value, void*>::type = nullptr) const
    {
        return System::ConfigurationParser::Utils::fromString<bool>(getAsStr(key));
    }
 
    template<typename T = std::string>
    T get(const std::string& key, T defaultValue, typename std::enable_if<std::is_same<T, bool>::value, void*>::type = nullptr) const
    {
        const auto v = getIfAny(key);
        return v.empty() ? defaultValue : System::ConfigurationParser::Utils::fromString<bool>(getAsStr(v));
    }
 
    bool isSet(const std::string& key) const
    {
        return map_.find(key) != map_.end();
    }
 
private:
    std::string getAsStr(const std::string& key) const
    {
        const auto it = map_.find(key);
 
        if (it == map_.end())
            throw std::domain_error("There is no setting '" + key +"' available.");
 
        return it->second;
    }
 
    std::string getAsStr(const std::string& key, const std::string& defaultValue) const
    {
        const auto it = map_.find(key);
        return (it == map_.end()) ? defaultValue : it->second;
    }
 
    std::string getIfAny(const std::string& key) const
    {
        return getAsStr(key, {});
    }
 
private:
    const System::ConfigurationParser::KeyValueMap map_;
};
 
}