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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>
namespace search::features {
/**
* Implements the necessary config to pass from the jaro winkler distance blueprint to the executor.
*/
struct JaroWinklerDistanceConfig {
JaroWinklerDistanceConfig();
uint32_t fieldId; // The id of field to process.
uint32_t fieldBegin; // The first field term to evaluate.
uint32_t fieldEnd; // The last field term to evaluate.
feature_t boostThreshold; // The jaro threshold to exceed to apply boost.
uint32_t prefixSize; // The number of characters to use for boost.
};
/**
* Implements the executor for the jaro winkler distance calculator.
*/
class JaroWinklerDistanceExecutor : public fef::FeatureExecutor {
public:
/**
* Constructs a new executor for the jaro winkler distance calculator.
*
* @param config The config for this executor.
*/
JaroWinklerDistanceExecutor(const fef::IQueryEnvironment &env,
const JaroWinklerDistanceConfig &config);
void execute(uint32_t docId) override;
private:
feature_t jaroWinklerProximity(const std::vector<fef::FieldPositionsIterator> &termPos, uint32_t fieldLen);
private:
const JaroWinklerDistanceConfig &_config; // The config for this executor.
std::vector<fef::TermFieldHandle> _termFieldHandles; // The handles of all query terms.
const fef::MatchData *_md;
void handle_bind_match_data(const fef::MatchData &md) override;
};
/**
* Implements the blueprint for the jaro winkler distance calculator.
*/
class JaroWinklerDistanceBlueprint : public fef::Blueprint {
public:
/**
* Constructs a new blueprint for the jaro winkler distance calculator.
*/
JaroWinklerDistanceBlueprint();
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 & params) override;
fef::FeatureExecutor &createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const override;
private:
JaroWinklerDistanceConfig _config; // The config for this blueprint.
};
}
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