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/FIX/ValueContainer.h>
#include <OnixS/CME/MDH/FIX/ValueConverters.h>
 
ONIXS_CMEMDHFIX_NAMESPACE_BEGIN

class ONIXS_CMEMDH_LTWT Field
{
    ValueContainer value_;
    const ValueConverter* converter_;
 
protected:
    Field(const ValueConverter& converter)
        : value_()
        , converter_(&converter)
    {
    }

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

    ValueContainer& value()
    {
        return value_;
    }
 
public:
    Field()
        : value_()
        , converter_(&NullConverter::self())
    {
    }

    Field(const Field& other)
        : value_(other.value_)
        , converter_(other.converter_)
    {
    }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    std::string toStr() const
    {
        std::string str;
 
        toStr(str);
 
        return str;
    }

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

    Field& operator=(const Field& other)
    {
        value_ = other.value_;
        converter_ = other.converter_;
 
        return *this;
    }
};
 
ONIXS_CMEMDHFIX_NAMESPACE_END