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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "nativeattributematchfeature.h"
#include "valuefeature.h"
#include "utils.h"
#include <vespa/searchlib/fef/fieldinfo.h>
#include <vespa/searchlib/fef/indexproperties.h>
#include <vespa/searchlib/fef/itablemanager.h>
#include <vespa/searchlib/fef/properties.h>
#include <vespa/vespalib/util/stash.h>
using namespace search::fef;
namespace search::features {
feature_t
NativeAttributeMatchExecutor::calculateScore(const CachedTermData &td, const TermFieldMatchData &tfmd)
{
return (td.weightBoostTable->get(tfmd.getWeight()) * td.scale);
}
NativeAttributeMatchExecutor::Precomputed
NativeAttributeMatchExecutor::preComputeSetup(const IQueryEnvironment & env,
const NativeAttributeMatchParams & params)
{
NativeAttributeMatchExecutor::Precomputed precomputed;
for (uint32_t i = 0; i < env.getNumTerms(); ++i) {
const ITermData *termData = env.getTerm(i);
if (termData->getWeight().percent() != 0) // only consider query terms with contribution
{
using FRA = search::fef::ITermFieldRangeAdapter;
for (FRA iter(*termData); iter.valid(); iter.next()) {
const ITermFieldData& tfd = iter.get();
uint32_t fieldId = tfd.getFieldId();
if (params.considerField(fieldId)) { // only consider fields with contribution
const NativeAttributeMatchParams::Param & param = params.vector[fieldId];
precomputed.first.push_back(CachedTermData(params, tfd,
param.fieldWeight * termData->getWeight().percent() / param.maxTableSum));
precomputed.second += (param.fieldWeight * termData->getWeight().percent());
}
}
}
}
return precomputed;
}
FeatureExecutor &
NativeAttributeMatchExecutor::createExecutor(const IQueryEnvironment & env,
const NativeAttributeMatchParams & params,
vespalib::Stash &stash)
{
Precomputed setup = preComputeSetup(env, params);
if (setup.first.size() == 0) {
return stash.create<SingleZeroValueExecutor>();
} else if (setup.first.size() == 1) {
return stash.create<NativeAttributeMatchExecutorSingle>(setup);
} else {
return stash.create<NativeAttributeMatchExecutorMulti>(setup);
}
}
void
NativeAttributeMatchExecutorMulti::execute(uint32_t docId)
{
feature_t score = 0;
for (size_t i = 0; i < _queryTermData.size(); ++i) {
const TermFieldMatchData *tfmd = _md->resolveTermField(_queryTermData[i].tfh);
if (tfmd->getDocId() == docId) {
score += calculateScore(_queryTermData[i], *tfmd);
}
}
outputs().set_number(0, score / _divisor);
}
void
NativeAttributeMatchExecutorMulti::handle_bind_match_data(const MatchData &md)
{
_md = &md;
}
void
NativeAttributeMatchExecutorSingle::execute(uint32_t docId)
{
const TermFieldMatchData &tfmd = *_md->resolveTermField(_queryTermData.tfh);
outputs().set_number(0, (tfmd.getDocId() == docId)
? calculateScore(_queryTermData, tfmd)
: 0);
}
void
NativeAttributeMatchExecutorSingle::handle_bind_match_data(const MatchData &md)
{
_md = &md;
}
NativeAttributeMatchBlueprint::NativeAttributeMatchBlueprint() :
Blueprint("nativeAttributeMatch"),
_params()
{
}
namespace {
const vespalib::string DefaultWeightTable = "linear(1,0)";
const vespalib::string WeightTableName = "weightTable";
}
void
NativeAttributeMatchBlueprint::visitDumpFeatures(const IIndexEnvironment & env,
IDumpFeatureVisitor & visitor) const
{
(void) env;
visitor.visitDumpFeature(getBaseName());
}
Blueprint::UP
NativeAttributeMatchBlueprint::createInstance() const
{
return std::make_unique<NativeAttributeMatchBlueprint>();
}
fef::ParameterDescriptions
NativeAttributeMatchBlueprint::getDescriptions() const
{
return fef::ParameterDescriptions().desc().attribute(fef::ParameterDataTypeSet::normalTypeSet(), fef::ParameterCollection::ANY).repeat();
}
bool
NativeAttributeMatchBlueprint::setup(const IIndexEnvironment & env,
const ParameterList & params)
{
_params.resize(env.getNumFields());
FieldWrapper fields(env, params, FieldType::ATTRIBUTE);
for (uint32_t i = 0; i < fields.getNumFields(); ++i) {
const FieldInfo * info = fields.getField(i);
uint32_t fieldId = info->id();
NativeAttributeMatchParams::Param & param = _params.vector[fieldId];
param.field = true;
const Table * weightBoostTable = util::lookupTable(env, getBaseName(), WeightTableName, info->name(), DefaultWeightTable);
if (weightBoostTable == NULL) {
return false;
}
param.weightBoostTable = SymmetricTable(*weightBoostTable);
param.fieldWeight = indexproperties::FieldWeight::lookup(env.getProperties(), info->name());
if (param.fieldWeight == 0) {
param.field = false;
}
if (NativeRankBlueprint::useTableNormalization(env)) {
_params.setMaxTableSums(fieldId, param.weightBoostTable.max());
}
}
describeOutput("score", "The native attribute match score");
return true;
}
FeatureExecutor &
NativeAttributeMatchBlueprint::createExecutor(const IQueryEnvironment &env, vespalib::Stash &stash) const
{
return NativeAttributeMatchExecutor::createExecutor(env, _params, stash);
}
}
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