76 lines
1.8 KiB
C++
76 lines
1.8 KiB
C++
#pragma once
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#include "database/db_transaction.hpp"
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#include "mvcc/version_list.hpp"
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#include "storage/model/properties/properties.hpp"
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#include "storage/model/properties/property.hpp"
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#include "transactions/transaction.hpp"
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template <class T, class Derived, class vlist_t = mvcc::VersionList<T>>
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class RecordAccessor
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{
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public:
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RecordAccessor(DbTransaction &db) : db(db){};
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RecordAccessor(T *t, vlist_t *vlist, DbTransaction &db)
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: record(t), vlist(vlist), db(db)
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{
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assert(record != nullptr);
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assert(vlist != nullptr);
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}
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RecordAccessor(vlist_t *vlist, DbTransaction &db)
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: record(vlist->find(db.trans)), vlist(vlist), db(db)
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{
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assert(record != nullptr);
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assert(vlist != nullptr);
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}
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bool empty() const { return record == nullptr; }
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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() const
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{
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assert(!empty());
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return Derived(vlist->update(db.trans), vlist, db);
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}
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bool remove() const
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{
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assert(!empty());
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return vlist->remove(record, db.trans);
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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 { return record->data.props; }
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explicit operator bool() const { return record != nullptr; }
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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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DbTransaction &db;
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};
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