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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "enum_store_types.h"
#include <vespa/vespalib/util/arrayref.h>
#include <cassert>
#include <limits>
namespace search::attribute {
/**
* Temporary representation of enumerated attribute loaded from enumerated
* save file.
*/
class LoadedEnumAttribute
{
private:
uint32_t _enum;
uint32_t _docId;
int32_t _weight;
public:
class EnumRadix
{
public:
uint64_t
operator()(const LoadedEnumAttribute &v)
{
return (static_cast<uint64_t>(v._enum) << 32) | v.getDocId();
}
};
class EnumCompare
{
public:
bool
operator()(const LoadedEnumAttribute &x,
const LoadedEnumAttribute &y) const
{
if (x.getEnum() != y.getEnum())
return x.getEnum() < y.getEnum();
return x.getDocId() < y.getDocId();
}
};
LoadedEnumAttribute()
: _enum(0),
_docId(0),
_weight(1)
{
}
LoadedEnumAttribute(uint32_t e,
uint32_t docId,
int32_t weight)
: _enum(e),
_docId(docId),
_weight(weight)
{
}
uint32_t getEnum() const { return _enum; }
uint32_t getDocId() const { return _docId; }
int32_t getWeight() const { return _weight; }
};
using LoadedEnumAttributeVector = std::vector<LoadedEnumAttribute, vespalib::allocator_large<LoadedEnumAttribute>>;
/**
* Helper class used to populate temporary vector representing loaded
* enumerated attribute with posting lists loaded from enumerated save
* file.
*/
class SaveLoadedEnum
{
private:
LoadedEnumAttributeVector &_loaded;
public:
SaveLoadedEnum(LoadedEnumAttributeVector &loaded)
: _loaded(loaded)
{
}
void
save(uint32_t e, uint32_t docId, int32_t weight)
{
_loaded.push_back(LoadedEnumAttribute(e, docId, weight));
}
};
/**
* Helper class used when loading non-enumerated attribute from
* enumerated save file.
*/
class NoSaveLoadedEnum
{
public:
static void
save(uint32_t e, uint32_t docId, int32_t weight)
{
(void) e;
(void) docId;
(void) weight;
}
};
/**
* Helper class used to populate temporary vector representing loaded
* enumerated attribute without posting lists loaded from enumerated
* save file.
*/
class SaveEnumHist
{
vespalib::ArrayRef<uint32_t> _hist;
public:
SaveEnumHist(enumstore::EnumVector &enumHist)
: _hist(enumHist)
{
}
void
save(uint32_t e, uint32_t docId, int32_t weight)
{
(void) docId;
(void) weight;
assert(e < _hist.size());
assert(_hist[e] < std::numeric_limits<uint32_t>::max());
++_hist[e];
}
};
void sortLoadedByEnum(LoadedEnumAttributeVector &loaded);
}
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