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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>
#include <vespa/searchlib/fef/table.h>
#include "termdistancecalculator.h"
namespace search::features {
/**
* This struct contains parameters used by the executor.
**/
struct TermDistanceParams {
uint32_t fieldId;
uint32_t termX;
uint32_t termY;
TermDistanceParams() : fieldId(0), termX(0), termY(0) {}
};
/**
* Implements the executor for calculating min term distance (forward and reverse).
**/
class TermDistanceExecutor : public fef::FeatureExecutor
{
private:
QueryTerm _termA;
QueryTerm _termB;
const fef::MatchData *_md;
virtual void handle_bind_match_data(const fef::MatchData &md) override;
public:
TermDistanceExecutor(const fef::IQueryEnvironment & env,
const TermDistanceParams & params);
void execute(uint32_t docId) override;
bool valid() const;
};
/**
* Implements the blueprint for the term distance executor.
**/
class TermDistanceBlueprint : public fef::Blueprint {
private:
TermDistanceParams _params;
public:
TermDistanceBlueprint();
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;
};
}
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