83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
#pragma once
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#include "transactions/transaction.hpp"
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#include "mvcc/version_list.hpp"
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#include "storage/model/properties/property.hpp"
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#include "storage/model/properties/properties.hpp"
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template <class T, class Store, class Derived>
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class RecordAccessor
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{
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protected:
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using vlist_t = mvcc::VersionList<T>;
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public:
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RecordAccessor() = default;
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RecordAccessor(T* record, vlist_t* vlist, Store* store)
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: record(record), vlist(vlist), store(store)
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{
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assert(record != nullptr);
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assert(vlist != nullptr);
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assert(store != nullptr);
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}
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bool empty() const
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{
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return record == nullptr;
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}
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const Id& id() const
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{
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assert(!empty());
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return vlist->id;
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}
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Derived update(tx::Transaction& t) const
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{
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assert(!empty());
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auto accessor = vlist->access(t);
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return Derived(accessor.update(t), vlist, store);
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}
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bool remove(tx::Transaction& t) const
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{
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assert(!empty());
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auto accessor = vlist->access(t);
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return accessor.remove(record);
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}
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const Property& property(const std::string& key) const
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{
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return record->data.props.at(key);
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}
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template <class V, class... Args>
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void property(const std::string& key, Args&&... args)
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{
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record->data.props.template set<V>(key, std::forward<Args>(args)...);
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}
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void property(const std::string& key, Property::sptr value)
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{
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record->data.props.set(key, std::move(value));
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}
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Properties& properties() const
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{
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return record->data.props;
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}
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explicit operator bool() const
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{
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return record != nullptr;
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}
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// protected:
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T* const record {nullptr};
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vlist_t* const vlist {nullptr};
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Store* const store {nullptr};
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};
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