Field.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/CME/MDH/messaging/TagBased/ValueContainer.h>
#include <OnixS/CME/MDH/messaging/TagBased/ValueConverters.h>
 
ONIXS_CMEMDH_MESSAGING_TAGBASED_NAMESPACE_BEGIN

class Field
{
public:
    Field()
        : value_()
        , converter_(&NullConverter::self())
    {
    }

    explicit ONIXS_CMEMDH_NODISCARD operator bool() const noexcept
    {
        return (converter_ != &NullConverter::self());
    }

    explicit ONIXS_CMEMDH_NODISCARD operator std::string() const
    {
        return toString();
    }

    ONIXS_CMEMDH_NODISCARD bool operator==(const StrRef& r) const
    {
        constexpr size_t bufSize = 512;
        Char buffer[bufSize];
 
        return this->toString(buffer, bufSize) == r;
    }

    ONIXS_CMEMDH_NODISCARD bool operator!=(const StrRef& r) const
    {
        return !this->operator==(r);
    }

    template <class Value>
    ONIXS_CMEMDH_NODISCARD typename ValueConversion<Value>::Result cast() const
    {
        ValueConversion<Value> convert;
 
        assert(converter_);
 
        return convert(*converter_, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toStringRef(StrRef& str) const
    {
        assert(converter_);
 
        return converter_->convert(str, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toChar(Char& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(Int8& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(UInt8& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(Int16& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(UInt16& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(Int32& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(UInt32& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(Int64& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(UInt64& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toNumber(Decimal& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toTimestamp(Timestamp& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    ONIXS_CMEMDH_NODISCARD bool toMaturityMonthYear(MaturityMonthYear& value) const
    {
        assert(converter_);
 
        return converter_->convert(value, value_);
    }

    template <class Enumeration>
    ONIXS_CMEMDH_NODISCARD bool toEnumeration(typename Enumeration::Enum& value) const
    {
        typename Enumeration::Base integral;
 
        assert(converter_);
 
        if (converter_->convert(integral, value_))
        {
            value = static_cast<typename Enumeration::Enum>(integral);
 
            return true;
        }
 
        return false;
    }

    template <class BitSet>
    ONIXS_CMEMDH_NODISCARD bool toBitSet(BitSet& value) const
    {
        typename BitSet::Bits bits;
 
        assert(converter_);
 
        if (converter_->convert(bits, value_))
        {
            value = BitSet(bits);
 
            return true;
        }
 
        return false;
    }

    ONIXS_CMEMDH_NODISCARD std::string toString() const
    {
        std::string str;
 
        toString(str);
 
        return str;
    }

    void toString(std::string& str) const
    {
        assert(converter_);
 
        converter_->toStr(str, value_);
    }

    StrRef toString(Char* buf, size_t size) const
    {
        assert(converter_);
 
        return converter_->toStr(buf, size, value_);
    }
 
protected:
    explicit Field(const ValueConverter& converter) noexcept
        : value_()
        , converter_(&converter)
    {
    }

    const ValueContainer& value() const noexcept
    {
        return value_;
    }

    ValueContainer& value() noexcept
    {
        return value_;
    }
 
private:
    ValueContainer value_;
    const ValueConverter* converter_;
};
 
inline bool operator==(const Field& ref, const std::string& str)
{
    return ref == StrRef(str);
}
 
inline bool operator!=(const Field& ref, const std::string& str)
{
    return ref != StrRef(str);
}
 
inline bool operator==(const std::string& str, const Field& ref)
{
    return ref == StrRef(str);
}
 
inline bool operator!=(const std::string& str, const Field& ref)
{
    return ref != StrRef(str);
}
 
inline bool operator==(const Field& ref, const char* str)
{
    return ref == StrRef(str);
}
 
inline bool operator!=(const Field& ref, const char* str)
{
    return ref != StrRef(str);
}
 
inline bool operator==(const char* str, const Field& ref)
{
    return ref == StrRef(str);
}
 
inline bool operator!=(const char* str, const Field& ref)
{
    return ref != StrRef(str);
}

inline std::ostream& operator<<(std::ostream& stream, const Field& field)
{
    return stream << field.toString();
}
 
ONIXS_CMEMDH_MESSAGING_TAGBASED_NAMESPACE_END