ArchiveObjectPropertyMapper.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "Serialization/ArchiveUObject.h"
#include "UObject/Class.h"
 
/*----------------------------------------------------------------------------
    FArchiveObjectPropertyMapper.
----------------------------------------------------------------------------*/
 
class FArchiveObjectPropertyMapper : public FArchiveUObject
{
public:
    FArchiveObjectPropertyMapper( TMap<FProperty*,UObject*>* InObjectGraph, UObject* InOuter=NULL, UClass* InLimitClass=NULL, bool bInRequireDirectOuter=true, bool bInSerializeRecursively=true )
    :   ObjectGraph( InObjectGraph ), LimitOuter(InOuter), LimitClass(InLimitClass), bRequireDirectOuter(bInRequireDirectOuter), bSerializeRecursively(bInSerializeRecursively)
    {
        ArIsObjectReferenceCollector = true;
        bSerializeRecursively = bInSerializeRecursively && LimitOuter != NULL;
    }
private:
    FArchive& operator<<( UObject*& Object )
    {
        // Avoid duplicate entries.
        if ( Object != NULL )
        {
            if ((LimitClass == NULL || Object->IsA(LimitClass)) &&
                (LimitOuter == NULL || (Object->GetOuter() == LimitOuter || (!bRequireDirectOuter && Object->IsIn(LimitOuter)))) )
            {
                ObjectGraph->Add(GetSerializedProperty(), Object);
                if ( bSerializeRecursively && !ObjectArray.Contains(Object) )
                {
                    ObjectArray.Add( Object );
 
                    // check this object for any potential object references
                    Object->Serialize(*this);
                }
            }
        }
 
        return *this;
    }
 
    TArray<UObject*>            ObjectArray;
 
    TMap<FProperty*,UObject*>*  ObjectGraph;
 
    UObject*            LimitOuter;
 
    UClass*             LimitClass;
 
    bool                bRequireDirectOuter;
 
    bool                bSerializeRecursively;
};