Interface_AssetUserData.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "UObject/ObjectMacros.h"
#include "Templates/SubclassOf.h"
#include "Templates/Casts.h"
#include "UObject/Interface.h"
#include "Engine/AssetUserData.h"
#include "Interface_AssetUserData.generated.h"
 
UINTERFACE(MinimalApi, meta=(CannotImplementInterfaceInBlueprint))
class UInterface_AssetUserData : public UInterface
{
    GENERATED_UINTERFACE_BODY()
};
 
class IInterface_AssetUserData
{
    GENERATED_IINTERFACE_BODY()
 
    virtual void AddAssetUserData(UAssetUserData* InUserData) {}
    
    UFUNCTION(BlueprintCallable, Category=AssetUserData, meta=(DeterminesOutputType="InUserDataClass"))
    virtual UAssetUserData* GetAssetUserDataOfClass(TSubclassOf<UAssetUserData> InUserDataClass)
    {
        return nullptr;
    }
 
    UFUNCTION(BlueprintCallable, Category=AssetUserData)
    virtual bool HasAssetUserDataOfClass(TSubclassOf<UAssetUserData> InUserDataClass)
    {       
        return GetAssetUserDataOfClass(InUserDataClass) != nullptr;
    }
    
    UFUNCTION(BlueprintCallable, Category=AssetUserData)
    virtual bool AddAssetUserDataOfClass(TSubclassOf<UAssetUserData> InUserDataClass)
    {
        check(InUserDataClass.Get() != nullptr);
        AddAssetUserData(NewObject<UAssetUserData>(_getUObject(), InUserDataClass.Get()));
        return GetAssetUserDataOfClass(InUserDataClass.Get()) != nullptr;
    }
 
    virtual const TArray<UAssetUserData*>* GetAssetUserDataArray() const
    {
        return nullptr;
    }
 
    template<typename T>
    T* GetAssetUserData()
    {
        return Cast<T>( GetAssetUserDataOfClass(T::StaticClass()) );
    }
 
    template<typename T>
    T* GetAssetUserDataChecked()
    {
        return CastChecked<T>(GetAssetUserDataOfClass(T::StaticClass()));
    }
 
    virtual void RemoveUserDataOfClass(TSubclassOf<UAssetUserData> InUserDataClass) {}
 
};