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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 "predicate_posting_list.h"
#include "predicate_interval_store.h"
namespace search::predicate {
/**
* PredicatePostingList implementation for regular interval iterators
* from PredicateIndex.
*/
template<typename Iterator>
class PredicateIntervalPostingList : public PredicatePostingList {
const PredicateIntervalStore &_interval_store;
Iterator _iterator;
const Interval *_current_interval;
uint32_t _interval_count;
Interval _single_buf;
public:
PredicateIntervalPostingList(const PredicateIntervalStore &interval_store, Iterator it);
bool next(uint32_t doc_id) override;
VESPA_DLL_LOCAL bool nextInterval() override {
if (_interval_count == 1) {
return false;
} else {
++_current_interval;
--_interval_count;
return true;
}
}
VESPA_DLL_LOCAL uint32_t getInterval() const override {
return _current_interval ? _current_interval->interval : 0;
}
};
template<typename Iterator>
PredicateIntervalPostingList<Iterator>::PredicateIntervalPostingList(
const PredicateIntervalStore &interval_store, Iterator it)
: _interval_store(interval_store),
_iterator(it),
_current_interval(nullptr),
_interval_count(0) {
}
template<typename Iterator>
bool
PredicateIntervalPostingList<Iterator>::next(uint32_t doc_id) {
if (!_iterator.valid()) {
return false;
}
if (__builtin_expect(_iterator.getKey() <= doc_id, true)) {
_iterator.linearSeek(doc_id + 1);
if (!_iterator.valid()) {
return false;
}
}
_current_interval = _interval_store.get(_iterator.getData(), _interval_count, &_single_buf);
setDocId(_iterator.getKey());
return true;
}
}
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