FDerivedData | Unreal Engine 5.2 Documentation

References


Module	CoreUObject
Header	/Engine/Source/Runtime/CoreUObject/Public/Serialization/DerivedData.h
Include	#include "Serialization/DerivedData.h"

class FDerivedData

Derived Data Reference

Provides a consistent way to reference derived data:

That has the same API for the editor as for builds with cooked packages.
That has the same API to load from the cache as from a raw buffer, a compressed buffer, or a cooked package.
That supports asynchronous, event-driven, prioritized loading of derived data.
That supports saving to a cooked package without loading from the cache, when using Zen.
That replaces serialized bulk data, such as FByteBulkData, in a cooked package.

	Type	Name	Description
		FDerivedData ()	Constructs a null reference.
		FDerivedData ( const DerivedData::Private::FCookedData& CookedData )	Constructs a reference from the private representation of a cooked reference.
		FDerivedData ( const DerivedData::FSharedString& Name, const FSharedBuffer& Data )	References a value that is stored in a buffer.
		FDerivedData ( const DerivedData::FSharedString& Name, const FCompositeBuffer& Data )
		FDerivedData ( const DerivedData::FSharedString& Name, const FCompressedBuffer& Data )
		FDerivedData ( const DerivedData::FSharedString& Name, const DerivedData::FCacheKey& Key )	References a value that was saved using ICache::PutValue.
		FDerivedData ( const DerivedData::FSharedString& Name, const DerivedData::FCacheKey& Key, const DerivedData::FValueId& ValueId )	References a value in a record that was saved using ICache::Put.

Type	Name	Description
EDerivedDataFlags	GetFlags ()	Returns the flags, which are mainly relevant for staged references.
const DerivedData::FSharedString &	GetName ()	Returns the name of the reference if available.
bool	HasData ()	Returns true if this is a non-null reference.
bool	IsCooked ()	Returns true if this is a cooked reference.
bool	IsNull ()	Returns true if this is a null reference.
bool	ReferenceEquals ( const FDerivedData& Other )	Returns true if this and the other are equivalent references.
uint32	ReferenceHash ()	Returns a hash that factors in the same members as ReferenceEquals.
void	Reset ()	Resets the reference to null.
void	Serialize ( FArchive& Ar, UObject* Owner )	Serializes this reference to or from a cooked package.
void	SetFlags ( EDerivedDataFlags Flags )	Overwrites the existing flags.