JsonObjectStructInterface.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "UObject/Class.h"
 
class FJsonObject;
struct IJsonObjectStructConverter;
 
struct FJsonObjectStructInterfaceRegistry
{
    static JSONUTILITIES_API void RegisterStructConverter(const UScriptStruct* ScriptStruct, const IJsonObjectStructConverter* ConverterInterface);
    static JSONUTILITIES_API void UnregisterStructConverter(const UScriptStruct* ScriptStruct);
};
 
enum class EJsonObjectConvertResult
{
    UseDefaultConverter,
    FailAndAbort,
    IgnoreAndContinue,
    Converted,
};
 
struct IJsonObjectStructConverter
{
    virtual EJsonObjectConvertResult ConvertToJson(const void* StructMemory, TSharedPtr<FJsonObject>& OutJsonObject) const = 0;
 
    virtual EJsonObjectConvertResult ConvertFromJson(void* StructMemory, const TSharedPtr<FJsonObject>& InJsonObject) const = 0;
 
protected:
 
    virtual ~IJsonObjectStructConverter() = default;
};
 
template<typename StructType>
struct TImplementsJsonObjectStructConverter : public IJsonObjectStructConverter
{
    TImplementsJsonObjectStructConverter<StructType>() {};
 
    virtual EJsonObjectConvertResult ConvertToJson(const void* StructMemory, TSharedPtr<FJsonObject>& OutJsonObject) const override
    {
        return static_cast<const StructType*>(StructMemory)->ConvertToJson(OutJsonObject);
    }
 
    virtual EJsonObjectConvertResult ConvertFromJson(void* StructMemory, const TSharedPtr<FJsonObject>& InJsonObject) const override
    {
        return static_cast<StructType*>(StructMemory)->ConvertFromJson(InJsonObject);
    }
};
 
namespace UE::Json::Private
{
    const struct IJsonObjectStructConverter* GetStructConverterInterface(const UScriptStruct* ScriptStruct);
}