78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
#ifndef OBJECT_INFO_HPP
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#define OBJECT_INFO_HPP
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#include "matador/object/basic_object_info.hpp"
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#include "matador/object/observer.hpp"
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#include <functional>
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namespace matador::object {
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class repository_node;
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template<typename Type>
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class observer_ptr {
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public:
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explicit observer_ptr(std::unique_ptr<observer<Type>> &&observer)
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: observer(std::move(observer)) {}
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operator bool() const { return observer != nullptr; }
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observer<Type> *get() const { return observer.get(); }
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observer<Type> &operator*() const { return *observer; }
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observer<Type> *operator->() const { return observer.get(); }
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private:
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std::unique_ptr<observer<Type>> observer;
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};
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template<typename Type>
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class object_info final : public basic_object_info {
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public:
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using create_func = std::function<std::unique_ptr<Type>()>;
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object_info(const std::shared_ptr<repository_node>& node,
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std::shared_ptr<class object> &&obj,
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create_func&& creator)
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: basic_object_info(node, std::move(obj))
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, creator_(std::move(creator)){
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}
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explicit object_info(const std::shared_ptr<repository_node>& node)
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: basic_object_info(node, {}) {
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}
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const Type &prototype() const { return prototype_; }
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std::unique_ptr<Type> create() const { return creator_(); }
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void on_attach() const override {
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for (auto &observer : observers_) {
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observer->on_attach(*node_, prototype_);
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}
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}
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void on_detach() const override {
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for (auto &observer : observers_) {
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observer->on_detach(*node_, prototype_);
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}
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}
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void register_observer(observer_ptr<Type> observer) {
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observers_.push_back(std::move(observer));
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}
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private:
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Type prototype_;
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create_func creator_{[]{ return std::make_unique<Type>(); }};
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std::vector<observer_ptr<Type>> observers_;
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};
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template<typename Type>
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using object_info_ref = std::reference_wrapper<const object_info<Type>>;
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namespace detail {
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struct null_type {};
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}
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using null_info = object_info<detail::null_type>;
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}
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#endif //OBJECT_INFO_HPP
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