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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 "multinumericenumattribute.h"
#include "postinglistattribute.h"
#include "i_document_weight_attribute.h"
namespace search {
/**
* Implementation of multi value numeric attribute that in addition to enum store and
* multi value mapping uses an underlying posting list to provide faster search.
* This class is used for both array and weighted set types.
*
* B: EnumAttribute<BaseClass>
* M: IEnumStore::Index (array) or
* multivalue::WeightedValue<IEnumStore::Index> (weighted set)
* M specifies the type stored in the MultiValueMapping
*/
template <typename B, typename M>
class MultiValueNumericPostingAttribute
: public MultiValueNumericEnumAttribute<B, M>,
protected PostingListAttributeSubBase<AttributeWeightPosting,
typename B::LoadedVector,
typename B::LoadedValueType,
typename B::EnumStore>
{
public:
using EnumStore = typename B::EnumStore;
using EnumIndex = typename EnumStore::Index;
using EnumStoreBatchUpdater = typename EnumStore::BatchUpdater;
private:
struct DocumentWeightAttributeAdapter final : IDocumentWeightAttribute {
const MultiValueNumericPostingAttribute &self;
DocumentWeightAttributeAdapter(const MultiValueNumericPostingAttribute &self_in) : self(self_in) {}
vespalib::datastore::EntryRef get_dictionary_snapshot() const override;
LookupResult lookup(const LookupKey & key, vespalib::datastore::EntryRef dictionary_snapshot) const override;
void collect_folded(vespalib::datastore::EntryRef enum_idx, vespalib::datastore::EntryRef dictionary_snapshot, const std::function<void(vespalib::datastore::EntryRef)>& callback) const override;
void create(vespalib::datastore::EntryRef idx, std::vector<DocumentWeightIterator> &dst) const override;
DocumentWeightIterator create(vespalib::datastore::EntryRef idx) const override;
std::unique_ptr<queryeval::SearchIterator> make_bitvector_iterator(vespalib::datastore::EntryRef idx, uint32_t doc_id_limit, fef::TermFieldMatchData &match_data, bool strict) const override;
bool has_weight_iterator(vespalib::datastore::EntryRef idx) const noexcept override;
};
DocumentWeightAttributeAdapter _document_weight_attribute_adapter;
friend class PostingListAttributeTest;
template <typename, typename, typename>
friend class attribute::PostingSearchContext; // getEnumStore()
using SelfType = MultiValueNumericPostingAttribute<B, M>;
using LoadedVector = typename B::LoadedVector;
using PostingParent = PostingListAttributeSubBase<AttributeWeightPosting, LoadedVector,
typename B::LoadedValueType, EnumStore>;
using ComparatorType = typename EnumStore::ComparatorType;
using Dictionary = EnumPostingTree;
using DictionaryConstIterator = typename Dictionary::ConstIterator;
using DocId = typename B::DocId;
using DocIndices = typename MultiValueNumericEnumAttribute<B, M>::DocIndices;
using FrozenDictionary = typename Dictionary::FrozenView;
using Posting = typename PostingParent::Posting;
using PostingList = typename PostingParent::PostingList;
using PostingMap = typename PostingParent::PostingMap;
using QueryTermSimpleUP = AttributeVector::QueryTermSimpleUP;
using WeightedIndex = typename MultiValueNumericEnumAttribute<B, M>::WeightedIndex;
using generation_t = typename MultiValueNumericEnumAttribute<B, M>::generation_t;
using PostingParent::_postingList;
using PostingParent::clearAllPostings;
using PostingParent::handle_load_posting_lists;
using PostingParent::handle_load_posting_lists_and_update_enum_store;
using PostingParent::forwardedOnAddDoc;
void freezeEnumDictionary() override;
void mergeMemoryStats(vespalib::MemoryUsage & total) override;
void applyValueChanges(const DocIndices& docIndices, EnumStoreBatchUpdater& updater) override;
public:
MultiValueNumericPostingAttribute(const vespalib::string & name, const AttributeVector::Config & cfg);
~MultiValueNumericPostingAttribute();
void reclaim_memory(generation_t oldest_used_gen) override;
void before_inc_generation(generation_t current_gen) override;
std::unique_ptr<attribute::SearchContext>
getSearch(QueryTermSimpleUP term, const attribute::SearchContextParams & params) const override;
const IDocumentWeightAttribute *asDocumentWeightAttribute() const override;
bool onAddDoc(DocId doc) override {
return forwardedOnAddDoc(doc, this->_mvMapping.getNumKeys(), this->_mvMapping.getCapacityKeys());
}
void load_posting_lists(LoadedVector& loaded) override {
handle_load_posting_lists(loaded);
}
attribute::IPostingListAttributeBase *getIPostingListAttributeBase() override {
return this;
}
const attribute::IPostingListAttributeBase *getIPostingListAttributeBase() const override {
return this;
}
void load_posting_lists_and_update_enum_store(enumstore::EnumeratedPostingsLoader& loader) override {
handle_load_posting_lists_and_update_enum_store(loader);
}
};
} // namespace search
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