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/ConflatedUDP/BinaryMessage.h>
 
#include <OnixS/CME/ConflatedUDP/FIX/Field.h>
#include <OnixS/CME/ConflatedUDP/FIX/Tag.h>
 
ONIXS_CONFLATEDUDPFIX_NAMESPACE_BEGIN

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

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

ONIXS_CONFLATEDUDP_LTWT_CLASS 
GroupEntry : public FieldSet
{
    GroupEntrySource binary_;
    const GroupEntryAccessor* accessor_;
 
protected:
    friend 
    ONIXS_CONFLATEDUDP_LTWT_CLASS_DECL
    (
        Group
    );

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

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

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

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

    Field field(Tag tag) const
    {
        assert(NULL != 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;

ONIXS_CONFLATEDUDP_LTWT_CLASS 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_(NULL)
    {
    }

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

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

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

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

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

ONIXS_CONFLATEDUDP_EXPORTED_STRUCT 
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;
};

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

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

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

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

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

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

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

    void 
    toFix(
        std::string& str) const
    {
        assert(NULL != 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_CONFLATEDUDPFIX_NAMESPACE_END