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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 "raw_attribute.h"
#include "raw_buffer_store.h"
#include <vespa/vespalib/util/rcuvector.h>
namespace search::attribute {
/**
* Attribute vector storing a single raw value per document.
*/
class SingleRawAttribute : public RawAttribute
{
using AtomicEntryRef = vespalib::datastore::AtomicEntryRef;
using EntryRef = vespalib::datastore::EntryRef;
using RefVector = vespalib::RcuVectorBase<AtomicEntryRef>;
RefVector _ref_vector;
RawBufferStore _raw_store;
vespalib::MemoryUsage update_stat();
EntryRef acquire_entry_ref(DocId docid) const noexcept { return _ref_vector.acquire_elem_ref(docid).load_acquire(); }
bool onLoad(vespalib::Executor *executor) override;
std::unique_ptr<AttributeSaver> onInitSave(vespalib::stringref fileName) override;
void populate_address_space_usage(AddressSpaceUsage& usage) const override;
public:
SingleRawAttribute(const vespalib::string& name, const Config& config);
~SingleRawAttribute() override;
void onCommit() override;
void onUpdateStat() override;
void reclaim_memory(generation_t oldest_used_gen) override;
void before_inc_generation(generation_t current_gen) override;
bool addDoc(DocId &docId) override;
vespalib::ConstArrayRef<char> get_raw(DocId docid) const override;
void set_raw(DocId docid, vespalib::ConstArrayRef<char> raw);
bool update(DocId docid, vespalib::ConstArrayRef<char> raw) { set_raw(docid, raw); return true; }
bool append(DocId docid, vespalib::ConstArrayRef<char> raw, int32_t weight) {
(void) docid;
(void) raw;
(void) weight;
return false;
}
bool isUndefined(DocId docid) const override;
uint32_t clearDoc(DocId docId) override;
std::unique_ptr<attribute::SearchContext> getSearch(std::unique_ptr<QueryTermSimple>, const attribute::SearchContextParams&) const override;
};
}
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