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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchlib/fef/blueprint.h>
namespace search::features {
/**
* Implements the necessary config for proximity.
*/
struct ProximityConfig {
ProximityConfig();
uint32_t fieldId; // The id of field to process.
uint32_t termA; // The id of the first query term in the pair (a, b).
uint32_t termB; // The id of the second query term.
};
/**
* Implements the executor for proximity.
*/
class ProximityExecutor : public fef::FeatureExecutor {
public:
/**
* Constructs an executor for proximity.
*
* @param env The query environment.
* @param config The completeness config.
*/
ProximityExecutor(const fef::IQueryEnvironment &env,
const ProximityConfig &config);
void execute(uint32_t docId) override;
private:
const ProximityConfig &_config; // The proximity config.
fef::TermFieldHandle _termA; // Handle to the first query term.
fef::TermFieldHandle _termB; // Handle to the second query term.
const fef::MatchData *_md;
bool findBest(const fef::TermFieldMatchData &matchA,
const fef::TermFieldMatchData &matchB);
void handle_bind_match_data(const fef::MatchData &md) override;
};
/**
* Implements the blueprint for proximity.
*/
class ProximityBlueprint : public fef::Blueprint {
public:
ProximityBlueprint();
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::ANY).number().number();
}
bool setup(const fef::IIndexEnvironment & env, const fef::ParameterList & params) override;
fef::FeatureExecutor &createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const override;
private:
ProximityConfig _config;
};
}
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