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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "matchesfeature.h"
#include "utils.h"
#include "valuefeature.h"
#include <vespa/searchlib/fef/featurenamebuilder.h>
#include <vespa/searchlib/fef/fieldinfo.h>
#include <vespa/vespalib/util/stash.h>
using namespace search::fef;
namespace search::features {
namespace {
/**
* Implements the executor for the matches feature for index and
* attribute fields.
*/
class MatchesExecutor : public fef::FeatureExecutor {
private:
std::vector<fef::TermFieldHandle> _handles;
const fef::MatchData *_md;
void handle_bind_match_data(const fef::MatchData &md) override;
public:
MatchesExecutor(uint32_t fieldId,
const fef::IQueryEnvironment &env,
uint32_t begin, uint32_t end);
void execute(uint32_t docId) override;
};
MatchesExecutor::MatchesExecutor(uint32_t fieldId,
const search::fef::IQueryEnvironment &env,
uint32_t begin, uint32_t end)
: FeatureExecutor(),
_handles(),
_md(nullptr)
{
for (uint32_t i = begin; i < end; ++i) {
search::fef::TermFieldHandle handle = util::getTermFieldHandle(env, i, fieldId);
if (handle != search::fef::IllegalHandle) {
_handles.push_back(handle);
}
}
}
void
MatchesExecutor::execute(uint32_t docId) {
size_t output = 0;
for (uint32_t i = 0; i < _handles.size(); ++i) {
const TermFieldMatchData *tfmd = _md->resolveTermField(_handles[i]);
if (tfmd->getDocId() == docId) {
output = 1;
break;
}
}
outputs().set_number(0, static_cast<feature_t>(output));
}
void
MatchesExecutor::handle_bind_match_data(const MatchData &md) {
_md = &md;
}
}
MatchesBlueprint::MatchesBlueprint() :
Blueprint("matches"),
_field(nullptr),
_termIdx(std::numeric_limits<uint32_t>::max())
{
}
void
MatchesBlueprint::visitDumpFeatures(const IIndexEnvironment& env,
IDumpFeatureVisitor& visitor) const
{
for (uint32_t i = 0; i < env.getNumFields(); ++i) {
const auto* field = env.getField(i);
if (field->type() == FieldType::INDEX || field->type() == FieldType::ATTRIBUTE) {
FeatureNameBuilder fnb;
fnb.baseName(getBaseName()).parameter(field->name());
visitor.visitDumpFeature(fnb.buildName());
}
}
}
bool
MatchesBlueprint::setup(const IIndexEnvironment &,
const ParameterList & params)
{
_field = params[0].asField();
if (params.size() == 2) {
_termIdx = params[1].asInteger();
}
describeOutput("out", "Returns 1 if the given field is matched by the query, 0 otherwise");
return true;
}
Blueprint::UP
MatchesBlueprint::createInstance() const
{
return std::make_unique<MatchesBlueprint>();
}
FeatureExecutor &
MatchesBlueprint::createExecutor(const IQueryEnvironment & queryEnv, vespalib::Stash &stash) const
{
if (_field == 0) {
return stash.create<SingleZeroValueExecutor>();
}
if (_termIdx != std::numeric_limits<uint32_t>::max()) {
return stash.create<MatchesExecutor>(_field->id(), queryEnv, _termIdx, _termIdx + 1);
} else {
return stash.create<MatchesExecutor>(_field->id(), queryEnv, 0, queryEnv.getNumTerms());
}
}
}
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