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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "postinglisttraits.h"
#include <functional>
namespace search::fef { class TermFieldMatchData; }
namespace search::queryeval { class SearchIterator; }
namespace search {
using DocumentWeightIterator = attribute::PostingListTraits<int32_t>::const_iterator;
struct IDocumentWeightAttribute
{
struct LookupKey {
virtual ~LookupKey() = default;
// It is required that the string is zero terminated
virtual vespalib::stringref asString() const = 0;
virtual bool asInteger(int64_t &value) const;
};
struct LookupResult {
const vespalib::datastore::EntryRef posting_idx;
const uint32_t posting_size;
const int32_t min_weight;
const int32_t max_weight;
const vespalib::datastore::EntryRef enum_idx;
LookupResult() : posting_idx(), posting_size(0), min_weight(0), max_weight(0), enum_idx() {}
LookupResult(vespalib::datastore::EntryRef posting_idx_in, uint32_t posting_size_in, int32_t min_weight_in, int32_t max_weight_in, vespalib::datastore::EntryRef enum_idx_in)
: posting_idx(posting_idx_in), posting_size(posting_size_in), min_weight(min_weight_in), max_weight(max_weight_in), enum_idx(enum_idx_in) {}
};
virtual vespalib::datastore::EntryRef get_dictionary_snapshot() const = 0;
virtual LookupResult lookup(const LookupKey & key, vespalib::datastore::EntryRef dictionary_snapshot) const = 0;
// Convenience only use by various tests.
LookupResult lookup(vespalib::stringref term, vespalib::datastore::EntryRef dictionary_snapshot) const;
/*
* Collect enum indexes (via callback) where folded
* (e.g. lowercased) value equals the folded value for enum_idx.
*/
virtual void collect_folded(vespalib::datastore::EntryRef enum_idx, vespalib::datastore::EntryRef dictionary_snapshot, const std::function<void(vespalib::datastore::EntryRef)>& callback) const = 0;
virtual void create(vespalib::datastore::EntryRef idx, std::vector<DocumentWeightIterator> &dst) const = 0;
virtual DocumentWeightIterator create(vespalib::datastore::EntryRef idx) const = 0;
virtual bool has_weight_iterator(vespalib::datastore::EntryRef idx) const noexcept = 0;
virtual std::unique_ptr<queryeval::SearchIterator> make_bitvector_iterator(vespalib::datastore::EntryRef idx, uint32_t doc_id_limit, fef::TermFieldMatchData &match_data, bool strict) const = 0;
virtual ~IDocumentWeightAttribute() = default;
};
}
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