MultiContainer.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 <cassert>
 
#include <vector>
#include <algorithm>
 
#include <OnixS/CME/ConflatedUDP/String.h>
#include <OnixS/CME/ConflatedUDP/FIX/Tag.h>
 
ONIXS_CONFLATEDUDPFIX_NAMESPACE_BEGIN

ONIXS_CONFLATEDUDP_LTWT_CLASS TagValue
{
    Tag tag_;
    StrRef value_;
 
public:
    typedef StrRef Value;

    TagValue()
    : tag_(0), value_()
    {
    }

    TagValue(
        Tag tag, 
        const Value& value)
        : tag_(tag)
        , value_(value)
    {
    }

    Tag tag() const
    {
        return tag_;
    }

    void
    tag(
        Tag tag)
    {
        tag_ = tag;
    }

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

    void
    value(
        const Value& value)
    {
        value_ = value;
    }

    void
    value(
        const Char* data, 
        size_t size)
    {
        value_.reset(data, size);
    }
};

ONIXS_CONFLATEDUDP_EXPORTED
void
toStr(
    std::string&, 
    const TagValue&);

inline 
std::string 
toStr(
    const TagValue& tagValue)
{
    std::string str;
 
    toStr(str, tagValue);
 
    return str;
}
 
//

typedef 
std::vector<TagValue> 
TagValues;

typedef
TagValues::iterator 
TagValueIterator;

typedef 
TagValues::const_iterator
TagValueConstIterator;
 
//

ONIXS_CONFLATEDUDP_LTWT_CLASS TagValueSelector
{
    Tag tag_;
 
public:
    explicit 
    TagValueSelector(
        Tag tag)
        : tag_(tag)
    {
    }

    bool 
    operator ()(
        const TagValue& tagValue) const
    {
        return (
            tagValue.tag() == 
            tag_);
    }
};
 
//

ONIXS_CONFLATEDUDP_LTWT_CLASS 
TagValueSelectionIterator
{
    const TagValues* container_;
    TagValueConstIterator ref_;
 
public:
    TagValueSelectionIterator()
        : container_(NULL)
        , ref_()
    {
    }

    TagValueSelectionIterator(
        const TagValues& container, 
        Tag selection)
        : container_(
            &container)
        , ref_(
            std::find_if(
                container.begin(), 
                container.end(), 
                TagValueSelector(selection)))
    {
    }

    operator bool() const
    {
        return (
            container_ && 
            ref_ != container_->end());
    }

    const TagValue& operator *() const
    {
        assert(static_cast<bool>(*this));
 
        return *ref_;
    }

    TagValueSelectionIterator& 
    operator ++() 
    {
        assert(static_cast<bool>(*this));
 
        const Tag selection = ref_->tag();
 
        ref_ = 
            std::find_if
            (
                ++ref_, 
                container_->end(), 
                TagValueSelector(selection)
            );
 
        return *this;
    }
};
 
//

ONIXS_CONFLATEDUDP_LTWT_CLASS MultiContainer
{
    TagValues tagValues_;
 
    // Builds sequence of tag-value pairs 
    // from the given FIX (tag=value) string. 
    ONIXS_CONFLATEDUDP_LTWT_EXPORTED
    static
    void
    deserialize(
        TagValues&, 
        const Char*, 
        size_t);
 
public:
    typedef Tag Key;

    typedef TagValue::Value Value;

    typedef 
    TagValues::const_iterator 
    Iterator;

    typedef 
    TagValueSelectionIterator
    SelectionIterator;

    MultiContainer()
    {
    }

    ~MultiContainer()
    {
    }

    Iterator begin() const
    {
        return tagValues_.begin();
    }

    Iterator end() const
    {
        return tagValues_.end();
    }

    Iterator 
    first(
        Key tag) const
    {
        return std::find_if
        (
            tagValues_.begin(), 
            tagValues_.end(), 
            TagValueSelector(tag)
        );
    }

    SelectionIterator
    all(
        Key tag) const
    {
        return 
            SelectionIterator
            (
                tagValues_, 
                tag
            );
    }

    void 
    deserialize(
        const Char* fixStr, 
        size_t fixSize)
    {
        tagValues_.clear();
 
        deserialize
        (
            tagValues_, 
            fixStr, 
            fixSize
        );
    }
};

inline 
MultiContainer::Value 
valueOrDefault(
    const MultiContainer& container, 
    Tag tag, 
    const 
    MultiContainer::Value& 
    defaultValue = 
        MultiContainer::Value())
{
    const 
    MultiContainer::Iterator 
    result = 
        container.first(tag);
 
    if (result != 
        container.end())
    {
        return result->value();
    }
 
    return defaultValue;
}

template
<
    class Number
>
bool
value(
    Number& number, 
    const MultiContainer& container, 
    Tag tag)
{
    const 
    MultiContainer::Value 
    strValue = 
        valueOrDefault(
            container, 
            tag);
 
    return fromStr
    (
        number, 
        strValue.items(), 
        strValue.size()
    );
}

template
<
    class Number
>
bool
valueOrDefault(
    Number& number, 
    const MultiContainer& container, 
    Tag tag, Number defaultValue = Number())
{
    const 
    MultiContainer::Value 
    strValue = 
        valueOrDefault(
            container, 
            tag);
 
    if (strValue.empty())
    {
        number = defaultValue;
 
        return true;
    }
 
    return fromStr
    (
        number, 
        strValue.items(), 
        strValue.size()
    );
}
 
// 

ONIXS_CONFLATEDUDP_EXPORTED
void
toStr(
    std::string&, 
    const MultiContainer&);

inline 
std::string 
toStr(
    const MultiContainer& container)
{
    std::string str;
 
    toStr(str, container);
 
    return str;
}
 
// 
 
ONIXS_CONFLATEDUDPFIX_NAMESPACE_END