TSortIndex.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#include <TSortIndex.hxx>
#include <algorithm>
#include <iterator>
#include <o3tl/functional.hxx>
 
using namespace connectivity;
 
namespace {
 
struct TKeyValueFunc
{
    OSortIndex* pIndex;
 
    explicit TKeyValueFunc(OSortIndex* _pIndex) : pIndex(_pIndex)
    {
    }
    // return false if compared values are equal otherwise true
    bool operator()(const OSortIndex::TIntValuePairVector::value_type& lhs,const OSortIndex::TIntValuePairVector::value_type& rhs)   const
    {
        const std::vector<OKeyType>& aKeyType = pIndex->getKeyType();
        size_t i = 0;
        for (auto const& elem : aKeyType)
        {
            const bool bGreater = pIndex->getAscending(i) != TAscendingOrder::ASC;
            const bool bLess = !bGreater;
 
            // compare depending for type
            switch (elem)
            {
                case OKeyType::String:
                {
                    sal_Int32 nRes = lhs.second->getKeyString(i).compareTo(rhs.second->getKeyString(i));
                    if (nRes < 0)
                        return bLess;
                    else if (nRes > 0)
                        return bGreater;
                }
                break;
                case OKeyType::Double:
                {
                    double d1 = lhs.second->getKeyDouble(i);
                    double d2 = rhs.second->getKeyDouble(i);
 
                    if (d1 < d2)
                        return bLess;
                    else if (d1 > d2)
                        return bGreater;
                }
                break;
                case OKeyType::NONE:
                    break;
            }
            ++i;
        }
 
        // know we know that the values are equal
        return false;
    }
};
 
}
 
::rtl::Reference<OKeySet> OSortIndex::CreateKeySet()
{
    Freeze();
 
    ::rtl::Reference<OKeySet> pKeySet = new OKeySet();
    pKeySet->reserve(m_aKeyValues.size());
    std::transform(m_aKeyValues.begin()
                    ,m_aKeyValues.end()
                    ,std::back_inserter(*pKeySet)
                    ,::o3tl::select1st<TIntValuePairVector::value_type>());
    pKeySet->setFrozen();
    return pKeySet;
}
 
OSortIndex::OSortIndex( std::vector<OKeyType>&& _aKeyType,
                        std::vector<TAscendingOrder>&& _aAscending)
    :m_aKeyType(std::move(_aKeyType))
    ,m_aAscending(std::move(_aAscending))
    ,m_bFrozen(false)
{
}
 
OSortIndex::~OSortIndex()
{
}
 
void OSortIndex::AddKeyValue(std::unique_ptr<OKeyValue> pKeyValue)
{
    assert(pKeyValue && "Can not be null here!");
    if(m_bFrozen)
    {
        m_aKeyValues.push_back({pKeyValue->getValue(),nullptr});
    }
    else
        m_aKeyValues.push_back({pKeyValue->getValue(),std::move(pKeyValue)});
}
 
void OSortIndex::Freeze()
{
    OSL_ENSURE(! m_bFrozen,"OSortIndex::Freeze: already frozen!");
    // sorting:
    if (m_aKeyType[0] != OKeyType::NONE)
        // we will sort ourself when the first keyType say so
        std::sort(m_aKeyValues.begin(),m_aKeyValues.end(),TKeyValueFunc(this));
 
    for (auto & keyValue : m_aKeyValues)
    {
        keyValue.second.reset();
    }
 
    m_bFrozen = true;
}
 
 
OKeyValue::OKeyValue(sal_Int32 nVal)
: m_nValue(nVal)
{
}
 
OKeyValue::~OKeyValue()
{
}
 
std::unique_ptr<OKeyValue> OKeyValue::createKeyValue(sal_Int32 _nVal)
{
    return std::unique_ptr<OKeyValue>(new OKeyValue(_nVal));
}
 
 
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