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// Copyright 2016 Yahoo Inc. 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/featureexecutor.h>
namespace search {
namespace features {
/**
* Implements the executor for the matchCount feature for index and
* attribute fields.
*/
class MatchCountExecutor : public fef::FeatureExecutor
{
private:
std::vector<fef::TermFieldHandle> _handles;
const fef::MatchData *_md;
virtual void handle_bind_match_data(fef::MatchData &md) override;
public:
MatchCountExecutor(uint32_t fieldId, const fef::IQueryEnvironment &env);
void execute(uint32_t docId) override;
};
/**
* Implements the blueprint for the matchCount executor.
*
* matchCount(name)
* - returns number of matches of the query in the particular field.
*/
class MatchCountBlueprint : public fef::Blueprint
{
private:
const fef::FieldInfo *_field;
public:
MatchCountBlueprint();
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().field();
}
bool setup(const fef::IIndexEnvironment & env,
const fef::ParameterList & params) override;
fef::FeatureExecutor &createExecutor(const fef::IQueryEnvironment &env, vespalib::Stash &stash) const override;
};
} // namespace features
} // namespace search
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