Message.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 <cstdlib>
 
#include <OnixS/CME/MDH/BinaryMessage.h>
 
#include <OnixS/CME/MDH/FIX/Field.h>
#include <OnixS/CME/MDH/FIX/Tag.h>
 
ONIXS_CMEMDHFIX_NAMESPACE_BEGIN

struct ONIXS_CMEMDH_EXPORTED FieldSet
{
    virtual Field field(Tag) const = 0;
};
 
typedef BinaryGroupEntry<MessageSize> GroupEntrySource;

struct ONIXS_CMEMDH_EXPORTED GroupEntryAccessor
{
    virtual Field field(const GroupEntrySource&, Tag) const = 0;
};

class ONIXS_CMEMDH_LTWT GroupEntry : public FieldSet
{
    GroupEntrySource binary_;
    const GroupEntryAccessor* accessor_;
 
protected:
    friend ONIXS_CMEMDH_LTWT_CLASS_DECL(Group);

    GroupEntry(const GroupEntrySource& binary, const GroupEntryAccessor& accessor)
        : binary_(binary)
        , accessor_(&accessor)
    {
    }
 
public:
    GroupEntry()
        : binary_()
        , accessor_(ONIXS_CMEMDH_NULLPTR)
    {
    }

    GroupEntry(const GroupEntry& other)
        : binary_(other.binary_)
        , accessor_(other.accessor_)
    {
    }

    operator bool() const
    {
        return (ONIXS_CMEMDH_NULLPTR != accessor_);
    }

    Field operator[](Tag tag) const
    {
        return this->field(tag);
    }

    Field field(Tag tag) const ONIXS_CMEMDH_OVERRIDE
    {
        assert(ONIXS_CMEMDH_NULLPTR != accessor_);
 
        return accessor_->field(binary_, tag);
    }

    GroupEntry& operator=(const GroupEntry& other)
    {
        binary_ = other.binary_;
        accessor_ = other.accessor_;
 
        return *this;
    }
};
 
typedef BinaryGroupEntries<GroupEntrySource, MessageSize, MessageSize, MessageSize> GroupEntriesSource;

class ONIXS_CMEMDH_LTWT Group
{
    GroupEntriesSource binary_;
    const GroupEntryAccessor* accessor_;
 
protected:
    Group(const GroupEntriesSource& binary, const GroupEntryAccessor& accessor)
        : binary_(binary)
        , accessor_(&accessor)
    {
    }
 
public:
    typedef GroupEntriesSource::Size Size;

    Group()
        : accessor_(ONIXS_CMEMDH_NULLPTR)
    {
    }

    Group(const Group& other)
        : binary_(other.binary_)
        , accessor_(other.accessor_)
    {
    }

    operator bool() const
    {
        return (ONIXS_CMEMDH_NULLPTR != accessor_);
    }

    Size size() const
    {
        return binary_.size();
    }

    GroupEntry operator[](Size index) const
    {
        assert(ONIXS_CMEMDH_NULLPTR != accessor_);
 
        return GroupEntry(binary_[index], *accessor_);
    }

    Group& operator=(const Group& other)
    {
        binary_ = other.binary_;
        accessor_ = other.accessor_;
 
        return *this;
    }
};

struct ONIXS_CMEMDH_EXPORTED MessageAccessor
{
    virtual StrRef type() const = 0;

    virtual Field field(const BinaryMessage&, Tag) const = 0;

    virtual Group group(const BinaryMessage&, Tag) const = 0;

    virtual void toFix(std::string&, const BinaryMessage&) const = 0;
};

class ONIXS_CMEMDH_LTWT Message : public FieldSet
{
    BinaryMessage binary_;
    const MessageAccessor* accessor_;
 
protected:
    Message(const BinaryMessage& binary, const MessageAccessor& accessor)
        : binary_(binary)
        , accessor_(&accessor)
    {
    }
 
public:
    Message()
        : binary_()
        , accessor_(ONIXS_CMEMDH_NULLPTR)
    {
    }

    Message(const Message& other)
        : binary_(other.binary_)
        , accessor_(other.accessor_)
    {
    }

    operator bool() const
    {
        return (ONIXS_CMEMDH_NULLPTR != accessor_);
    }

    StrRef type() const
    {
        assert(ONIXS_CMEMDH_NULLPTR != accessor_);
 
        return accessor_->type();
    }

    Field operator[](Tag tag) const
    {
        return this->field(tag);
    }

    Field field(Tag tag) const ONIXS_CMEMDH_OVERRIDE
    {
        assert(ONIXS_CMEMDH_NULLPTR != accessor_);
 
        return accessor_->field(binary_, tag);
    }

    Group group(Tag tag) const
    {
        assert(ONIXS_CMEMDH_NULLPTR != accessor_);
 
        return accessor_->group(binary_, tag);
    }

    void toFix(std::string& str) const
    {
        assert(ONIXS_CMEMDH_NULLPTR != accessor_);
 
        accessor_->toFix(str, binary_);
    }

    Message& operator=(const Message& other)
    {
        binary_ = other.binary_;
        accessor_ = other.accessor_;
 
        return *this;
    }
};

inline void toStr(std::string& str, const Message& message)
{
    message.toFix(str);
}

inline std::string toStr(const Message& message)
{
    std::string str;
 
    toStr(str, message);
 
    return str;
}
 
ONIXS_CMEMDHFIX_NAMESPACE_END