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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 "singlestringattribute.h"
#include "postinglistattribute.h"
namespace search {
/**
* Implementation of single value string attribute that in addition to enum store
* uses an underlying posting list to provide faster search.
*
* B: EnumAttribute<StringAttribute>
*/
template <typename B>
class SingleValueStringPostingAttributeT
: public SingleValueStringAttributeT<B>,
protected PostingListAttributeSubBase<AttributePosting,
typename B::LoadedVector,
typename B::LoadedValueType,
typename B::EnumStore>
{
public:
using EnumStore = typename SingleValueStringAttributeT<B>::EnumStore;
using EnumStoreBatchUpdater = typename EnumStore::BatchUpdater;
private:
using LoadedVector = typename B::LoadedVector;
using PostingParent = PostingListAttributeSubBase<AttributePosting,
LoadedVector,
typename B::LoadedValueType,
typename B::EnumStore>;
using Change = StringAttribute::Change;
using ChangeVector = StringAttribute::ChangeVector;
using ComparatorType = typename EnumStore::ComparatorType;
using DocId = typename SingleValueStringAttributeT<B>::DocId;
using EnumIndex = typename SingleValueStringAttributeT<B>::EnumIndex;
using PostingMap = typename PostingParent::PostingMap;
using QueryTermSimpleUP = AttributeVector::QueryTermSimpleUP;
using SelfType = SingleValueStringPostingAttributeT<B>;
using ValueModifier = typename SingleValueStringAttributeT<B>::ValueModifier;
using generation_t = typename SingleValueStringAttributeT<B>::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;
public:
using PostingList = typename PostingParent::PostingList;
using Dictionary = EnumPostingTree;
using PostingParent::getPostingList;
private:
void freezeEnumDictionary() override;
void mergeMemoryStats(vespalib::MemoryUsage & total) override;
void applyUpdateValueChange(const Change & c,
EnumStore & enumStore,
std::map<DocId, EnumIndex> &currEnumIndices);
void makePostingChange(const vespalib::datastore::EntryComparator &cmp,
IEnumStoreDictionary& dictionary,
const std::map<DocId, EnumIndex> &currEnumIndices,
PostingMap &changePost);
void applyValueChanges(EnumStoreBatchUpdater& updater) override;
public:
SingleValueStringPostingAttributeT(const vespalib::string & name, const AttributeVector::Config & c);
SingleValueStringPostingAttributeT(const vespalib::string & name);
~SingleValueStringPostingAttributeT();
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;
bool onAddDoc(DocId doc) override {
return forwardedOnAddDoc(doc, this->_enumIndices.size(), this->_enumIndices.capacity());
}
void onAddDocs(DocId lidLimit) override {
forwardedOnAddDoc(lidLimit, this->_enumIndices.size(), this->_enumIndices.capacity());
}
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);
}
};
using SingleValueStringPostingAttribute = SingleValueStringPostingAttributeT<EnumAttribute<StringAttribute> >;
} // namespace search
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