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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "utils.h"
#include <vespa/searchcommon/attribute/attributecontent.h>
#include <vespa/searchcommon/attribute/i_multi_value_read_view.h>
#include <vespa/searchcommon/attribute/multivalue.h>
#include <vespa/searchlib/fef/blueprint.h>
#include <vespa/vespalib/hwaccelrated/iaccelrated.h>
#include <vespa/vespalib/stllike/hash_map.hpp>
namespace search::fef { class Property; }
namespace vespalib { class nbostream; }
namespace search::features {
namespace dotproduct {
struct ConstCharComparator {
bool operator()(const char * lhs, const char * rhs) const {
return strcmp(lhs, rhs) == 0;
}
};
template <typename Src, typename Dst>
struct Converter {
Dst convert(const Src & value) const { return value; }
};
template <>
struct Converter<vespalib::string, const char *> {
const char * convert(const vespalib::string & value) const { return value.c_str(); }
};
template <typename T>
struct ArrayParam : public fef::Anything {
ArrayParam(const fef::Property & prop);
ArrayParam(vespalib::nbostream & stream);
ArrayParam(std::vector<T> v) : values(std::move(v)) {}
~ArrayParam() override;
std::vector<T> values;
std::vector<uint32_t> indexes;
};
namespace wset {
template <typename DimensionVType, typename DimensionHType, typename ComponentType, typename HashMapComparator = std::equal_to<DimensionHType> >
class VectorBase : public fef::Anything {
public:
using Element = std::pair<DimensionVType, ComponentType>; // <dimension, component>
using Vector = std::vector<Element>;
using HashMap = vespalib::hash_map<DimensionHType, ComponentType, vespalib::hash<DimensionHType>, HashMapComparator, vespalib::hashtable_base::and_modulator>;
protected:
VectorBase();
Vector _vector;
HashMap _dimMap; // dimension -> component
public:
VectorBase(VectorBase && rhs) = default;
VectorBase & operator = (VectorBase && rhs) = default;
~VectorBase();
const Vector & getVector() const { return _vector; }
VectorBase & syncMap();
const HashMap & getDimMap() const { return _dimMap; }
bool empty() const { return _vector.empty(); }
};
template <typename T>
using NumericVectorBaseT = VectorBase<T, T, feature_t>;
/**
* Represents a vector where the dimensions are integers.
**/
template<typename T>
class IntegerVectorT : public NumericVectorBaseT<T> {
public:
void insert(vespalib::stringref label, vespalib::stringref value) {
this->_vector.emplace_back(util::strToNum<T>(label), util::strToNum<feature_t>(value));
}
};
extern template class VectorBase<int64_t, int64_t, double>;
extern template class VectorBase<uint32_t, uint32_t, double>;
extern template class IntegerVectorT<int64_t>;
using IntegerVector = IntegerVectorT<int64_t>;
using StringVectorBase = VectorBase<vespalib::string, const char*, feature_t, ConstCharComparator>;
/**
* Represents a vector where the dimensions are string values.
**/
class StringVector : public StringVectorBase {
public:
StringVector();
StringVector(StringVector &&) = default;
StringVector & operator = (StringVector &&) = default;
~StringVector();
void insert(vespalib::stringref label, vespalib::stringref value) {
_vector.emplace_back(label, util::strToNum<feature_t>(value));
}
};
/**
* Represents a vector where the dimensions are enum values for strings.
**/
class EnumVector : public VectorBase<attribute::EnumHandle, attribute::EnumHandle, feature_t> {
private:
const attribute::IAttributeVector * _attribute;
public:
EnumVector(const attribute::IAttributeVector * attribute) : _attribute(attribute) {}
void insert(vespalib::stringref label, vespalib::stringref value) {
attribute::EnumHandle e;
if (_attribute->findEnum(label.data(), e)) {
_vector.emplace_back(e, util::strToNum<feature_t>(value));
}
}
};
/**
* Common base for handling execution for all wset dot product executors.
* Only cares about the underlying value type, not the concrete type of the
* attribute vector itself.
*/
template <typename BaseType>
class DotProductExecutorBase : public fef::FeatureExecutor {
public:
using AT = multivalue::WeightedValue<BaseType>;
using V = std::conditional_t<std::is_same_v<BaseType,const char*>,StringVectorBase,NumericVectorBaseT<BaseType>>;
private:
const V & _queryVector;
const typename V::HashMap::const_iterator _end;
virtual vespalib::ConstArrayRef<AT> getAttributeValues(uint32_t docid) = 0;
public:
DotProductExecutorBase(const V & queryVector);
~DotProductExecutorBase() override;
void execute(uint32_t docId) override;
};
template <typename BaseType>
class DotProductByWeightedSetReadViewExecutor final : public DotProductExecutorBase<BaseType> {
public:
using WeightedSetReadView = attribute::IWeightedSetReadView<BaseType>;
using AT = typename DotProductExecutorBase<BaseType>::AT;
using V = typename DotProductExecutorBase<BaseType>::V;
protected:
const WeightedSetReadView * _weighted_set_read_view;
private:
std::unique_ptr<V> _backing;
vespalib::ConstArrayRef<AT> getAttributeValues(uint32_t docid) override;
public:
DotProductByWeightedSetReadViewExecutor(const WeightedSetReadView* weighted_set_read_view, const V & queryVector);
DotProductByWeightedSetReadViewExecutor(const WeightedSetReadView * weighted_set_read_view, std::unique_ptr<V> queryVector);
~DotProductByWeightedSetReadViewExecutor();
};
}
namespace array {
/**
* Common base for handling execution for all array dot product executors.
* Only cares about the underlying value type, not the concrete type of the
* attribute vector itself.
*/
template <typename BaseType>
class DotProductExecutorBase : public fef::FeatureExecutor {
public:
using V = std::vector<BaseType>;
private:
const vespalib::hwaccelrated::IAccelrated & _multiplier;
V _queryVector;
virtual vespalib::ConstArrayRef<BaseType> getAttributeValues(uint32_t docid) = 0;
public:
DotProductExecutorBase(const V & queryVector);
~DotProductExecutorBase() override;
void execute(uint32_t docId) final override;
};
/**
* Implements the executor for the dotproduct feature using array read view.
*/
template <typename BaseType>
class DotProductByArrayReadViewExecutor : public DotProductExecutorBase<BaseType> {
public:
using V = typename DotProductExecutorBase<BaseType>::V;
using ArrayReadView = attribute::IArrayReadView<BaseType>;
protected:
const ArrayReadView* _array_read_view;
private:
vespalib::ConstArrayRef<BaseType> getAttributeValues(uint32_t docid) override;
public:
DotProductByArrayReadViewExecutor(const ArrayReadView* array_read_view, const V & queryVector);
~DotProductByArrayReadViewExecutor();
};
/**
* Implements the executor for the dotproduct feature.
*/
template <typename A>
class DotProductExecutor : public DotProductExecutorBase<typename A::BaseType> {
public:
using V = typename DotProductExecutorBase<typename A::BaseType>::V;
protected:
const A * _attribute;
public:
DotProductExecutor(const A * attribute, const V & queryVector);
~DotProductExecutor();
};
template <typename BaseType>
class SparseDotProductExecutorBase : public DotProductExecutorBase<BaseType> {
public:
using IV = std::vector<uint32_t>;
using V = typename DotProductExecutorBase<BaseType>::V;
SparseDotProductExecutorBase(const V & queryVector, const IV & queryIndexes);
~SparseDotProductExecutorBase();
protected:
IV _queryIndexes;
std::vector<BaseType> _scratch;
};
template <typename BaseType>
class SparseDotProductByArrayReadViewExecutor : public SparseDotProductExecutorBase<BaseType> {
public:
using SparseDotProductExecutorBase<BaseType>::_queryIndexes;
using SparseDotProductExecutorBase<BaseType>::_scratch;
using IV = std::vector<uint32_t>;
using V = typename SparseDotProductExecutorBase<BaseType>::V;
using ArrayReadView = attribute::IArrayReadView<BaseType>;
SparseDotProductByArrayReadViewExecutor(const ArrayReadView* array_read_view, const V & queryVector, const IV & queryIndexes);
~SparseDotProductByArrayReadViewExecutor();
private:
vespalib::ConstArrayRef<BaseType> getAttributeValues(uint32_t docid) override;
const ArrayReadView* _array_read_view;
};
}
}
/**
* Implements the blueprint for the foreach executor.
*/
class DotProductBlueprint : public fef::Blueprint {
private:
using IAttributeVector = attribute::IAttributeVector;
vespalib::string _defaultAttribute;
vespalib::string _attributeOverride;
vespalib::string _queryVector;
vespalib::string _attrKey;
vespalib::string _queryVectorKey;
const vespalib::string & getAttribute(const fef::IQueryEnvironment & env) const;
const IAttributeVector * upgradeIfNecessary(const IAttributeVector * attribute, const fef::IQueryEnvironment & env) const;
public:
DotProductBlueprint();
~DotProductBlueprint() override;
void visitDumpFeatures(const fef::IIndexEnvironment & env, fef::IDumpFeatureVisitor & visitor) const override;
fef::Blueprint::UP createInstance() const override;
fef::ParameterDescriptions getDescriptions() const override;
bool setup(const fef::IIndexEnvironment & env, const fef::ParameterList & params) override;
void prepareSharedState(const fef::IQueryEnvironment & queryEnv, fef::IObjectStore & objectStore) const override;
fef::FeatureExecutor &createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const override;
};
}
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