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redxdev/FindBlueprintsWithAssetRegistry.cpp

Last active July 25, 2023 20:28
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FindBlueprintsWithAssetRegistry.cpp
FAssetRegistryModule& AssetRegistryModule = FModuleManager::LoadModuleChecked<FAssetRegistryModule>(TEXT("AssetRegistry"));
IAssetRegistry& AssetRegistry = AssetRegistryModule.Get();
// Optional
TArray<FString> ContentPaths;
ContentPaths.Add(TEXT("/Game/My/Folder"));
AssetRegistry.ScanPathsSynchronous(ContentPaths);
// End Optional
TSet<FName> DerivedNames;
{
TArray<FName> BaseNames;
BaseNames.Add(UMyBaseClass::StaticClass()->GetFName());
TSet<FName> Excluded;
AssetRegistry.GetDerivedClassNames(BaseNames, Excluded, DerivedNames);
}
FARFilter Filter;
Filter.PackagePaths.Add(TEXT("/Game/My/Folder")); // optional
Filter.ClassPaths.Add(FTopLevelAssetPath(UBlueprint::StaticClass()));
Filter.bRecursiveClasses = true;
Filter.bRecursivePaths = true;
TArray<FAssetData> AssetList;
AssetRegistry.GetAssets(Filter, AssetList);
TArray<TSoftClassPtr<UMyBaseClass>> FoundClasses;
for (const FAssetData& Asset : AssetList)
{
auto GeneratedClassPath = Asset.TagsAndValues.FindTag(TEXT("GeneratedClass"));
if (GeneratedClassPath.IsSet())
{
const FString ClassObjectPath = FPackageName::ExportTextPathToObjectPath(GeneratedClassPath.GetValue());
const FString ClassName = FPackageName::ObjectPathToObjectName(ClassObjectPath);
if (!DerivedNames.Contains(*ClassName))
{
continue;
}
FoundClasses.Add(TSoftClassPtr<UMyBaseClass>(FSoftObjectPath(ClassObjectPath)));
}
}
// FoundClasses now has a list of *soft* class pointers.
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