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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "element_completeness_feature.h"
#include <vespa/searchlib/fef/itermdata.h>
#include <vespa/searchlib/fef/featurenamebuilder.h>
#include <vespa/searchlib/fef/properties.h>
#include <vespa/vespalib/locale/c.h>
#include <vespa/vespalib/util/stash.h>
#include <cassert>
namespace search::features {
//-----------------------------------------------------------------------------
ElementCompletenessExecutor::ElementCompletenessExecutor(const fef::IQueryEnvironment &env,
const ElementCompletenessParams ¶ms)
: _params(params),
_terms(),
_queue(),
_sumTermWeight(0),
_md(nullptr)
{
for (uint32_t i = 0; i < env.getNumTerms(); ++i) {
const fef::ITermData *termData = env.getTerm(i);
if (termData->getWeight().percent() != 0) { // only consider query terms with contribution
using FRA = fef::ITermFieldRangeAdapter;
for (FRA iter(*termData); iter.valid(); iter.next()) {
const fef::ITermFieldData &tfd = iter.get();
if (tfd.getFieldId() == _params.fieldId) {
int termWeight = termData->getWeight().percent();
_sumTermWeight += termWeight;
_terms.push_back(Term(tfd.getHandle(), termWeight));
}
}
}
}
}
void
ElementCompletenessExecutor::execute(uint32_t docId)
{
assert(_queue.empty());
for (size_t i = 0; i < _terms.size(); ++i) {
const fef::TermFieldMatchData *tfmd = _md->resolveTermField(_terms[i].termHandle);
if (tfmd->getDocId() == docId) {
Item item(i, tfmd->begin(), tfmd->end());
if (item.pos != item.end) {
_queue.push(item);
}
}
}
State best(0, 0);
while (!_queue.empty()) {
uint32_t elementId = _queue.front().pos->getElementId();
State state(_queue.front().pos->getElementWeight(),
_queue.front().pos->getElementLen());
while (!_queue.empty() && _queue.front().pos->getElementId() == elementId) {
state.addMatch(_terms[_queue.front().termIdx].termWeight);
Item &item = _queue.front();
while (item.pos != item.end && item.pos->getElementId() == elementId) {
++item.pos;
}
if (item.pos == item.end) {
_queue.pop_front();
} else {
_queue.adjust();
}
}
state.calculateScore(_sumTermWeight, _params.fieldCompletenessImportance);
if (state.score > best.score) {
best = state;
}
}
outputs().set_number(0, best.completeness);
outputs().set_number(1, best.fieldCompleteness);
outputs().set_number(2, best.queryCompleteness);
outputs().set_number(3, best.elementWeight);
}
void
ElementCompletenessExecutor::handle_bind_match_data(const fef::MatchData &md)
{
_md = &md;
}
//-----------------------------------------------------------------------------
ElementCompletenessBlueprint::ElementCompletenessBlueprint()
: Blueprint("elementCompleteness"),
_output(),
_params()
{
_output.push_back("completeness");
_output.push_back("fieldCompleteness");
_output.push_back("queryCompleteness");
_output.push_back("elementWeight");
}
ElementCompletenessBlueprint::~ElementCompletenessBlueprint() = default;
void
ElementCompletenessBlueprint::visitDumpFeatures(const fef::IIndexEnvironment &env,
fef::IDumpFeatureVisitor &visitor) const
{
for (uint32_t i = 0; i < env.getNumFields(); ++i) {
const fef::FieldInfo &field = *env.getField(i);
if (field.type() == fef::FieldType::INDEX) {
if (!field.isFilter()) {
fef::FeatureNameBuilder fnb;
fnb.baseName(getBaseName()).parameter(field.name());
for (size_t out = 0; out < _output.size(); ++out) {
visitor.visitDumpFeature(fnb.output(_output[out]).buildName());
}
}
}
}
}
fef::Blueprint::UP
ElementCompletenessBlueprint::createInstance() const
{
return std::make_unique<ElementCompletenessBlueprint>();
}
bool
ElementCompletenessBlueprint::setup(const fef::IIndexEnvironment &env,
const fef::ParameterList ¶ms)
{
const fef::FieldInfo *field = params[0].asField();
_params.fieldId = field->id();
const fef::Properties &lst = env.getProperties();
fef::Property obj = lst.lookup(getName(), "fieldCompletenessImportance");
if (obj.found()) {
_params.fieldCompletenessImportance = vespalib::locale::c::atof(obj.get().c_str());
}
describeOutput(_output[0], "combined completeness for best scored element");
describeOutput(_output[1], "best scored element completeness");
describeOutput(_output[2], "query completeness for best scored element");
describeOutput(_output[3], "element weight of best scored element");
env.hintFieldAccess(field->id());
return true;
}
fef::FeatureExecutor &
ElementCompletenessBlueprint::createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const
{
return stash.create<ElementCompletenessExecutor>(env, _params);
}
//-----------------------------------------------------------------------------
}
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