FlatGroup.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 <iterator>
 
#include <OnixS/FIXEngine/Compiler.h>
#include <OnixS/FIXEngine/FIX/FlatMessage.h>
 
namespace OnixS {
namespace FIX {
ONIXS_FIXENGINE_API_DECL(class, FlatMessage);
ONIXS_FIXENGINE_API_DECL(class, FlatGroup);

class ONIXS_FIXENGINE_API FlatGroupInstance
{
public:

    FlatFieldRef find(Tag) const;

    StringRef operator[](const FlatFieldRef &) const;

    FlatGroup getGroup(const FlatFieldRef & numberOfInstancesRef) const;
 
private:
 
    friend class MessageOperator;
 
    FlatGroupInstance(const FlatMessage *, const StringRef &, const FlatGroupInstance * parent);
    FlatGroupInstance(const FlatMessage *, const FlatGroupInstance *, const FlatGroupInstance * parent);
 
    const FlatMessage * container_;
    Tag parentLeadingTag_;
    FlatField leadingField_;
};

class ONIXS_FIXENGINE_API FlatGroup
{
public:

    size_t size() const { return groupSize_; }

    StringRef groupFieldValue() const { return StringRef(groupFieldValue_, groupFieldValueSize_); }

    class ONIXS_FIXENGINE_API ConstIterator
    {
    public:
 
        typedef std::forward_iterator_tag iterator_category;
        typedef FlatGroupInstance value_type;
        typedef std::ptrdiff_t difference_type;
        typedef const FlatGroupInstance * pointer;
        typedef const FlatGroupInstance & reference;

        ConstIterator(const FlatGroup *, size_t);
 
        reference operator*() const {
            return currentGroupInstance_;
        }
 
        pointer operator->() const {
            return &currentGroupInstance_;
        }
 
        bool operator == (const ConstIterator &) const;
        bool operator != (const ConstIterator &) const;
 
        ConstIterator & operator ++();
 
    private:
        const FlatGroup * container_;

        size_t currentGroupInstanceIndex_;

        FlatGroupInstance currentGroupInstance_;
    };
 
    typedef ConstIterator const_iterator;

    ConstIterator begin() const;

    ConstIterator end() const;
 
private:
 
    friend class MessageOperator;
 
    FlatGroup(const FlatMessage *, FlatFieldRef, const FlatGroupInstance *);
 
    const FlatMessage * container_;
 
    const FlatGroupInstance * parent_;
 
    const char * groupFieldValue_;
 
    size_t groupFieldValueSize_;
 
    size_t groupSize_;
};
 
}
}