FInstance.h

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#pragma once
#include <iostream>
#include "FBase.h"
 
namespace dyno {
 
    class Object;
 
    class InstanceBase : public FBase
    {
    public:
        InstanceBase() : FBase() {};
        InstanceBase(std::string name, std::string description, FieldTypeEnum fieldType, OBase* parent)
            : FBase(name, description, fieldType, parent) {}
 
    public:
        virtual bool canBeConnectedBy(InstanceBase* ins) = 0;
        virtual void setObjectPointer(std::shared_ptr<Object> op) = 0;
        virtual std::shared_ptr<Object> objectPointer() = 0;
        virtual std::shared_ptr<Object> standardObjectPointer() = 0;
 
        static const std::string className() {
            return std::string("FInstance");
        }
    };

    template<typename T>
    class FInstance : public InstanceBase
    {
    public:
        typedef T                  VarType;
        typedef FInstance<T>        FieldType;
 
        FInstance() : InstanceBase() {}
 
        FInstance(std::string name, std::string description, FieldTypeEnum fieldType, OBase* parent)
            : InstanceBase(name, description, fieldType, parent) {}
 
        const std::string getTemplateName() override { return std::string(typeid(VarType).name()); }
        const std::string getClassName() final { return "FInstance"; }
 
        std::shared_ptr<T> getDataPtr() {
            InstanceBase* ins = dynamic_cast<InstanceBase*>(this->getTopField());
            std::shared_ptr<T> data = std::static_pointer_cast<T>(ins->objectPointer());
 
            this->tick();
 
            return data;
        }
 
        std::shared_ptr<T> constDataPtr() {
            InstanceBase* ins = dynamic_cast<InstanceBase*>(this->getTopField());
            std::shared_ptr<T> data = std::static_pointer_cast<T>(ins->objectPointer());
 
            return data;
        }
 
        void setDataPtr(std::shared_ptr<T> sPtr)
        {
            InstanceBase* ins = dynamic_cast<InstanceBase*>(this->getTopField());
            ins->setObjectPointer(sPtr);
 
            this->tick();
        }
 
        std::shared_ptr<T> allocate() {
            if (mData == nullptr) {
                mData = std::make_shared<T>();
            }
 
            this->tick();
 
            return mData;
        }
 
        bool isEmpty() override {
            return this->constDataPtr() == nullptr;
        }
 
        bool connect(FBase* dst) override {
            InstanceBase* dstIns = dynamic_cast<InstanceBase*>(dst);
            if (dstIns == nullptr) {
                return false;
            }
 
            if (!dstIns->canBeConnectedBy(this)) {
                return false;
            }
 
            return this->connectField(dst);
        }
 
        bool disconnect(FBase* dst) override
        {
            InstanceBase* dstIns = dynamic_cast<InstanceBase*>(dst);
            if (dstIns == nullptr) {
                return false;
            }
 
            return this->disconnectField(dst);
        }
 
        T& getData() {
            auto dataPtr = this->getDataPtr();
            assert(dataPtr != nullptr);
 
            return *dataPtr;
        }
 
        uint size() override { return 1; }
 
    public:
        std::shared_ptr<Object> objectPointer() final {
            return std::dynamic_pointer_cast<Object>(mData);
        }
 
        std::shared_ptr<Object> standardObjectPointer() final {
            return std::make_shared<T>();
        }
 
        void setObjectPointer(std::shared_ptr<Object> op) final {
            auto dPtr = std::dynamic_pointer_cast<T>(op);
            assert(dPtr != nullptr);
 
            mData = dPtr;
        }
 
        bool canBeConnectedBy(InstanceBase* ins) final {
            if (ins->inputPolicy() == FInputPolicy::One)
            {
                std::shared_ptr<Object> dataPtr = ins->standardObjectPointer();
                auto dPtr = std::dynamic_pointer_cast<T>(dataPtr);
 
                return dPtr == nullptr ? false : true;
            }
            
            return false;
        }
 
    private:
        std::shared_ptr<T> mData = nullptr;
    };
 
    template<typename T>
    class FInstances : public InstanceBase
    {
    public:
        typedef T                  VarType;
        typedef FInstances<T>      FieldType;
 
        FInstances() : InstanceBase() {}
 
        FInstances(std::string name, std::string description, FieldTypeEnum fieldType, OBase* parent)
            : InstanceBase(name, description, fieldType, parent) {}
 
        const std::string getTemplateName() override { return std::string(typeid(VarType).name()); }
        const std::string getClassName() final { return "FInstances"; }
 
        std::shared_ptr<T> constDataPtr(const uint i) {
            assert(i < this->getSources().size());
 
            InstanceBase* ins = dynamic_cast<InstanceBase*>(this->getSources()[i]->getTopField());
            std::shared_ptr<T> data = std::static_pointer_cast<T>(ins->objectPointer());
 
            return data;
        }

        bool connect(FBase* dst) override {
            return false;
        }
 
        bool disconnect(FBase* dst) override {
            return false;
        }
 
        bool isEmpty() override {
            return this->getSources().size() == 0;
        }
 
        uint size() override { return this->getSources().size(); }
 
    public:
        FInputPolicy inputPolicy() override { return FInputPolicy::Many; }
 
        void setObjectPointer(std::shared_ptr<Object> op) override {};
        std::shared_ptr<Object> objectPointer() override { return nullptr; }
 
        std::shared_ptr<Object> standardObjectPointer() final {
            return std::make_shared<T>();
        }
 
        bool canBeConnectedBy(InstanceBase* ins) final {
            if (ins->inputPolicy() == FInputPolicy::One)
            {
                std::shared_ptr<Object> dataPtr = ins->standardObjectPointer();
 
                auto dPtr = std::dynamic_pointer_cast<T>(dataPtr);
 
                return dPtr == nullptr ? false : true;
            }
            else
                return false;
        }
    };
}