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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 "searchiterator.h"
#include <vespa/searchlib/common/bitvector.h>
#include <vespa/searchlib/fef/termfieldmatchdata.h>
#include <vespa/searchlib/fef/termfieldmatchdataarray.h>
namespace search::queryeval {
/**
* Wraps an iterator for use as a filter search.
* Owns TermFieldMatchData the wrapped iterator
* can wire to, and write to if necessary.
**/
class FilterWrapper : public SearchIterator {
private:
std::vector<fef::TermFieldMatchData> _unused_md;
fef::TermFieldMatchDataArray _tfmda;
std::unique_ptr<SearchIterator> _wrapped_search;
public:
FilterWrapper(size_t num_fields)
: _unused_md(num_fields),
_tfmda(),
_wrapped_search()
{
for (size_t i = 0; i < num_fields; ++i) {
_tfmda.add(&_unused_md[i]);
}
}
const fef::TermFieldMatchDataArray& tfmda() const { return _tfmda; }
void wrap(std::unique_ptr<SearchIterator> wrapped) {
_wrapped_search = std::move(wrapped);
}
void wrap(SearchIterator *wrapped) {
_wrapped_search.reset(wrapped);
}
void doSeek(uint32_t docid) override {
_wrapped_search->seek(docid); // use outer seek for most robustness
setDocId(_wrapped_search->getDocId()); // propagate current iterator docid
}
void doUnpack(uint32_t) override {}
void initRange(uint32_t begin_id, uint32_t end_id) override {
SearchIterator::initRange(begin_id, end_id);
_wrapped_search->initRange(begin_id, end_id);
setDocId(_wrapped_search->getDocId());
}
void or_hits_into(BitVector &result, uint32_t begin_id) override {
_wrapped_search->or_hits_into(result, begin_id);
}
void and_hits_into(BitVector &result, uint32_t begin_id) override {
_wrapped_search->and_hits_into(result, begin_id);
}
BitVector::UP get_hits(uint32_t begin_id) override {
return _wrapped_search->get_hits(begin_id);
}
Trinary is_strict() const override {
return _wrapped_search->is_strict();
}
};
} // namespace
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