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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/attribute/i_document_weight_attribute.h>
#include <vespa/searchlib/fef/termfieldmatchdata.h>
namespace search::queryeval {
class DocumentWeightSearchIterator : public SearchIterator
{
private:
fef::TermFieldMatchData &_tfmd;
fef::TermFieldMatchDataPosition * _matchPosition;
DocumentWeightIterator _iterator;
queryeval::MinMaxPostingInfo _postingInfo;
public:
DocumentWeightSearchIterator(fef::TermFieldMatchData &tfmd,
const IDocumentWeightAttribute &attr,
IDocumentWeightAttribute::LookupResult dict_entry)
: _tfmd(tfmd),
_matchPosition(_tfmd.populate_fixed()),
_iterator(attr.create(dict_entry.posting_idx)),
_postingInfo(queryeval::MinMaxPostingInfo(dict_entry.min_weight, dict_entry.max_weight))
{ }
void initRange(uint32_t begin, uint32_t end) override {
SearchIterator::initRange(begin, end);
_iterator.lower_bound(begin);
updateDocId();
}
void updateDocId() {
if (_iterator.valid()) {
setDocId(_iterator.getKey());
} else {
setAtEnd();
}
}
void doSeek(uint32_t docId) override {
_iterator.linearSeek(docId);
updateDocId();
}
void doUnpack(uint32_t docId) override {
_tfmd.resetOnlyDocId(docId);
_matchPosition->setElementWeight(_iterator.getData());
}
const queryeval::PostingInfo *getPostingInfo() const override { return &_postingInfo; }
Trinary is_strict() const override { return Trinary::True; }
};
}
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