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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "utils.h"
#include <vespa/searchlib/fef/blueprint.h>
#include <vespa/searchlib/fef/featureexecutor.h>
#include <vespa/searchlib/attribute/multivalue.h>
#include <vespa/vespalib/hwaccelrated/iaccelrated.h>
#include <vespa/searchcommon/attribute/attributecontent.h>
#include <vespa/vespalib/stllike/hash_map.hpp>
namespace search {
namespace fef {
class Property;
}
namespace 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);
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:
typedef std::pair<DimensionVType, ComponentType> Element; // <dimension, component>
typedef std::vector<Element> Vector;
typedef vespalib::hash_map<DimensionHType, ComponentType, vespalib::hash<DimensionHType>, HashMapComparator> HashMap;
protected:
VectorBase();
Vector _vector;
HashMap _dimMap; // dimension -> component
public:
~VectorBase();
const Vector & getVector() const { return _vector; }
void syncMap() {
Converter<DimensionVType, DimensionHType> conv;
_dimMap.clear();
_dimMap.resize(_vector.size()*2);
for (size_t i = 0; i < _vector.size(); ++i) {
_dimMap.insert(std::make_pair(conv.convert(_vector[i].first), _vector[i].second));
}
}
const HashMap & getDimMap() const { return _dimMap; }
};
/**
* Represents a vector where the dimensions are integers.
**/
class IntegerVector : public VectorBase<int64_t, int64_t, feature_t> {
public:
void insert(const vespalib::stringref & label, const vespalib::stringref & value) {
_vector.push_back(std::make_pair(util::strToNum<int64_t>(label), util::strToNum<feature_t>(value)));
}
};
/**
* Represents a vector where the dimensions are string values.
**/
class StringVector : public VectorBase<vespalib::string, const char *, feature_t, ConstCharComparator> {
public:
~StringVector();
void insert(const vespalib::stringref & label, const vespalib::stringref & value) {
_vector.push_back(std::make_pair(label, util::strToNum<feature_t>(value)));
}
};
/**
* Represents a vector where the dimensions are enum values for strings.
**/
class EnumVector : public VectorBase<search::attribute::EnumHandle, search::attribute::EnumHandle, feature_t> {
private:
const search::attribute::IAttributeVector * _attribute;
public:
EnumVector(const search::attribute::IAttributeVector * attribute) : _attribute(attribute) {}
void insert(const vespalib::stringref & label, const vespalib::stringref & value) {
search::attribute::EnumHandle e;
if (_attribute->findEnum(label.c_str(), e)) {
_vector.push_back(std::make_pair(e, util::strToNum<feature_t>(value)));
}
}
};
/**
* Implements the executor for the dotproduct feature.
*/
template <typename Vector, typename Buffer>
class DotProductExecutor : public fef::FeatureExecutor {
private:
const search::attribute::IAttributeVector * _attribute;
Vector _queryVector;
Buffer _buffer;
public:
DotProductExecutor(const search::attribute::IAttributeVector * attribute, const Vector & queryVector);
void execute(uint32_t docId) override;
};
}
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 AT = multivalue::Value<BaseType>;
using V = std::vector<BaseType>;
private:
vespalib::hwaccelrated::IAccelrated::UP _multiplier;
V _queryVector;
virtual size_t getAttributeValues(uint32_t docid, const AT * & count) = 0;
public:
DotProductExecutorBase(const V & queryVector);
~DotProductExecutorBase();
void execute(uint32_t docId) final override;
};
/**
* Implements the executor for the dotproduct feature.
*/
template <typename A>
class DotProductExecutor : public DotProductExecutorBase<typename A::BaseType> {
public:
using AT = typename DotProductExecutorBase<typename A::BaseType>::AT;
using V = typename DotProductExecutorBase<typename A::BaseType>::V;
protected:
const A * _attribute;
private:
virtual size_t getAttributeValues(uint32_t docid, const AT * & count) override;
public:
DotProductExecutor(const A * attribute, const V & queryVector);
~DotProductExecutor();
};
template <typename A>
class DotProductByCopyExecutor : public DotProductExecutor<A> {
public:
typedef typename DotProductExecutor<A>::V V;
DotProductByCopyExecutor(const A * attribute, const V & queryVector);
~DotProductByCopyExecutor();
private:
typedef typename DotProductExecutor<A>::AT AT;
size_t getAttributeValues(uint32_t docid, const AT * & count) final override;
std::vector<typename A::BaseType> _copy;
};
/**
* Dot product executor which uses AttributeContent for the specified base value type
* to extract array elements from a given attribute vector. Used for "synthetic"
* attribute vectors such as imported attributes, where we cannot directly access
* the memory of the underlying attribute store.
*
* Some caveats:
* - 64 bit value type width is enforced, so 32-bit value types will not benefit
* from extra SIMD register capacity.
* - Additional overhead caused by call indirection and copy step.
*/
template <typename BaseType>
class DotProductByContentFillExecutor : public DotProductExecutorBase<BaseType> {
public:
using V = typename DotProductExecutorBase<BaseType>::V;
using AT = typename DotProductExecutorBase<BaseType>::AT;
using ValueFiller = attribute::AttributeContent<BaseType>;
DotProductByContentFillExecutor(const attribute::IAttributeVector * attribute, const V & queryVector);
~DotProductByContentFillExecutor();
private:
size_t getAttributeValues(uint32_t docid, const AT * & values) final override;
const attribute::IAttributeVector* _attribute;
ValueFiller _filler;
};
template <typename A>
class SparseDotProductExecutor : public DotProductExecutor<A> {
public:
typedef std::vector<uint32_t> IV;
typedef typename DotProductExecutor<A>::V V;
SparseDotProductExecutor(const A * attribute, const V & queryVector, const IV & queryIndexes);
~SparseDotProductExecutor();
private:
typedef typename DotProductExecutor<A>::AT AT;
size_t getAttributeValues(uint32_t docid, const AT * & count) override;
protected:
IV _queryIndexes;
std::vector<AT> _scratch;
};
template <typename A>
class SparseDotProductByCopyExecutor : public SparseDotProductExecutor<A> {
public:
typedef std::vector<uint32_t> IV;
typedef typename DotProductExecutor<A>::V V;
SparseDotProductByCopyExecutor(const A * attribute, const V & queryVector, const IV & queryIndexes);
~SparseDotProductByCopyExecutor();
private:
typedef typename DotProductExecutor<A>::AT AT;
size_t getAttributeValues(uint32_t docid, const AT * & count) final override;
std::vector<typename A::BaseType> _copy;
};
/**
* Dot product executor which uses AttributeContent for fetching values. See
* DotProductByContentFillExecutor for a more in-depth description and caveats.
*/
template <typename BaseType>
class SparseDotProductByContentFillExecutor : public DotProductExecutorBase<BaseType> {
public:
using IV = std::vector<uint32_t>;
using V = typename DotProductExecutorBase<BaseType>::V;
using AT = typename DotProductExecutorBase<BaseType>::AT;
using ValueFiller = attribute::AttributeContent<BaseType>;
SparseDotProductByContentFillExecutor(const attribute::IAttributeVector * attribute,
const V & queryVector,
const IV & queryIndexes);
~SparseDotProductByContentFillExecutor();
private:
size_t getAttributeValues(uint32_t docid, const AT * & values) final override;
const attribute::IAttributeVector* _attribute;
IV _queryIndexes;
ValueFiller _filler;
};
}
}
/**
* Implements the blueprint for the foreach executor.
*/
class DotProductBlueprint : public fef::Blueprint {
private:
vespalib::string _defaultAttribute;
vespalib::string _queryVector;
vespalib::string getAttribute(const fef::IQueryEnvironment & env) const;
public:
DotProductBlueprint();
~DotProductBlueprint();
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;
};
} // namespace features
} // namespace search
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