DirectLinkElementSnapshot.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "DirectLinkCommon.h"
#include "DirectLinkParameterStore.h"
#include "UObject/NameTypes.h"
 
#define UE_API DIRECTLINK_API
 
class FArchive;
 
namespace DirectLink
{
class IReferenceResolutionProvider;
class ISceneGraphNode;
 
 
enum class ESerializationStatus
{
    Ok,
    StreamError,
    VersionMinNotRespected,
    VersionMaxNotRespected,
};
 
 
struct FReferenceSnapshot
{
    UE_API void Serialize(FArchive& Ar);
    UE_API FElementHash Hash() const;
 
    struct FReferenceGroup
    {
        FName Name;
        TArray<FSceneGraphId> ReferencedIds;
    };
 
    TArray<FReferenceGroup> Groups;
};
 
 
 
class FElementSnapshot
{
public:
    FElementSnapshot() = default;
    UE_API FElementSnapshot(const ISceneGraphNode& Node);
 
    friend FArchive& operator<<(FArchive& Ar, FElementSnapshot& This);
 
    UE_API ESerializationStatus Serialize(FArchive& Ar);
 
    UE_API FElementHash GetHash() const;
    UE_API FElementHash GetDataHash() const; // #ue_directlink_sync: serialize hashs
    UE_API FElementHash GetRefHash() const;
 
    UE_API void UpdateNodeReferences(IReferenceResolutionProvider& Resolver, ISceneGraphNode& Node) const;
    UE_API void UpdateNodeData(ISceneGraphNode& Node) const;
 
    FSceneGraphId GetNodeId() const { return NodeId; }
 
    template<typename T>
    bool GetValueAs(FName Name, T& Out) const
    {
        return DataSnapshot.GetValueAs(Name, Out);
    }
 
private:
    FSceneGraphId NodeId;
    mutable FElementHash DataHash = InvalidHash;
    mutable FElementHash RefHash = InvalidHash;
    FParameterStoreSnapshot DataSnapshot;
    FReferenceSnapshot RefSnapshot;
};
 
} // namespace DirectLink
 
#undef UE_API