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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchlib/fef/blueprint.h>
#include <vespa/vespalib/util/priority_queue.h>
namespace search::features {
//-----------------------------------------------------------------------------
class TextSimilarityExecutor : public fef::FeatureExecutor
{
private:
std::vector<fef::TermFieldHandle> _handles;
std::vector<int> _weights;
int _total_term_weight;
struct Item {
uint32_t idx;
fef::TermFieldMatchData::PositionsIterator pos;
fef::TermFieldMatchData::PositionsIterator end;
Item(uint32_t idx_in,
fef::TermFieldMatchData::PositionsIterator pos_in,
fef::TermFieldMatchData::PositionsIterator end_in)
: idx(idx_in), pos(pos_in), end(end_in) {}
bool operator<(const Item &other) const {
return (pos->getPosition() == other.pos->getPosition())
? (idx < other.idx)
: (pos->getPosition() < other.pos->getPosition());
}
};
vespalib::PriorityQueue<Item> _queue;
const fef::MatchData *_md;
void handle_bind_match_data(const fef::MatchData &md) override;
public:
TextSimilarityExecutor(const fef::IQueryEnvironment &env, uint32_t field_id);
bool isPure() override { return _handles.empty(); }
void execute(uint32_t docId) override;
};
//-----------------------------------------------------------------------------
class TextSimilarityBlueprint : public fef::Blueprint
{
private:
static const vespalib::string score_output;
static const vespalib::string proximity_output;
static const vespalib::string order_output;
static const vespalib::string query_coverage_output;
static const vespalib::string field_coverage_output;
uint32_t _field_id;
public:
TextSimilarityBlueprint();
~TextSimilarityBlueprint() override;
void visitDumpFeatures(const fef::IIndexEnvironment &env, fef::IDumpFeatureVisitor &visitor) const override;
fef::Blueprint::UP createInstance() const override;
fef::ParameterDescriptions getDescriptions() const override {
return fef::ParameterDescriptions().desc().indexField(fef::ParameterCollection::SINGLE);
}
bool setup(const fef::IIndexEnvironment &env, const fef::ParameterList ¶ms) override;
fef::FeatureExecutor &createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const override;
};
}
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