Hilt Series: Architecture Components com Hilt - HiltViewModelFactory.java

HiltViewModelFactory.java

public final class HiltViewModelFactory extends AbstractSavedStateViewModelFactory {

    private static final String KEY_PREFIX = "androidx.hilt.lifecycle.HiltViewModelFactory";

    private final SavedStateViewModelFactory mDelegateFactory;
    private final Map<String,
            Provider<ViewModelAssistedFactory<? extends ViewModel>>> mViewModelFactories;

    HiltViewModelFactory(
            @NonNull SavedStateRegistryOwner owner,
            @Nullable Bundle defaultArgs,
            @NonNull SavedStateViewModelFactory delegateFactory,
            @NonNull Map<String,
                    Provider<ViewModelAssistedFactory<? extends ViewModel>>> viewModelFactories) {
        super(owner, defaultArgs);
        this.mDelegateFactory = delegateFactory;
        this.mViewModelFactories = viewModelFactories;
    }

    @NonNull
    @Override
    @SuppressWarnings("unchecked")
    protected <T extends ViewModel> T create(@NonNull String key, @NonNull Class<T> modelClass,
            @NonNull SavedStateHandle handle) {
        Provider<ViewModelAssistedFactory<? extends ViewModel>> factoryProvider =
                mViewModelFactories.get(modelClass.getName());
        if (factoryProvider == null) {
            ...
            return mDelegateFactory.create(KEY_PREFIX + ":" + key, modelClass);
        }
        return (T) factoryProvider.get().create(handle);
    }
}