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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/vespalib/util/priority_queue.h>
namespace search::features {
//-----------------------------------------------------------------------------
struct FlowCompletenessParams {
uint32_t fieldId;
feature_t fieldWeight;
feature_t fieldCompletenessImportance;
FlowCompletenessParams()
: fieldId(fef::IllegalFieldId),
fieldWeight(0),
fieldCompletenessImportance(0.5) {}
};
//-----------------------------------------------------------------------------
const uint32_t IllegalElementId = 0xffffffff;
const uint32_t IllegalTermId = 0xffffffff;
const uint32_t IllegalPosId = 0xffffffff;
class FlowCompletenessExecutor : public fef::FeatureExecutor
{
private:
struct Term {
fef::TermFieldHandle termHandle;
int termWeight;
Term(fef::TermFieldHandle handle, int weight)
: termHandle(handle), termWeight(weight) {}
};
struct Item {
uint32_t elemId;
uint32_t termIdx;
fef::TermFieldMatchData::PositionsIterator pos;
fef::TermFieldMatchData::PositionsIterator end;
Item(uint32_t idx,
fef::TermFieldMatchData::PositionsIterator p,
fef::TermFieldMatchData::PositionsIterator e)
: elemId(IllegalElementId), termIdx(idx), pos(p), end(e)
{
if (p != e) elemId = p->getElementId();
}
bool operator< (const Item &other) const {
return (elemId < other.elemId);
}
};
FlowCompletenessParams _params;
std::vector<Term> _terms;
vespalib::PriorityQueue<Item> _queue;
int _sumTermWeight;
const fef::MatchData *_md;
static bool nextElement(Item &item);
void handle_bind_match_data(const fef::MatchData &md) override;
public:
FlowCompletenessExecutor(const fef::IQueryEnvironment &env,
const FlowCompletenessParams ¶ms);
bool isPure() override { return _terms.empty(); }
void execute(uint32_t docId) override;
};
//-----------------------------------------------------------------------------
class FlowCompletenessBlueprint : public fef::Blueprint
{
private:
std::vector<vespalib::string> _output;
FlowCompletenessParams _params;
public:
FlowCompletenessBlueprint();
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);
}
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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