| /* |
| * Copyright (C) 2020 The Dagger Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package dagger.hilt.android.lifecycle; |
| |
| import dagger.hilt.GeneratesRootInput; |
| import java.lang.annotation.ElementType; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| |
| /** |
| * Identifies a {@link androidx.lifecycle.ViewModel} for construction injection. |
| * |
| * <p>The {@code ViewModel} annotated with {@link HiltViewModel} will be available for creation by |
| * the {@link dagger.hilt.android.lifecycle.HiltViewModelFactory} and can be retrieved by default in |
| * an {@code Activity} or {@code Fragment} annotated with {@link |
| * dagger.hilt.android.AndroidEntryPoint}. The {@code HiltViewModel} containing a constructor |
| * annotated with {@link javax.inject.Inject} will have its dependencies defined in the constructor |
| * parameters injected by Dagger's Hilt. |
| * |
| * <p>Example: |
| * |
| * <pre> |
| * @HiltViewModel |
| * public class DonutViewModel extends ViewModel { |
| * @Inject |
| * public DonutViewModel(SavedStateHandle handle, RecipeRepository repository) { |
| * // ... |
| * } |
| * } |
| * </pre> |
| * |
| * <pre> |
| * @AndroidEntryPoint |
| * public class CookingActivity extends AppCompatActivity { |
| * public void onCreate(Bundle savedInstanceState) { |
| * DonutViewModel vm = new ViewModelProvider(this).get(DonutViewModel.class); |
| * } |
| * } |
| * </pre> |
| * |
| * <p>Exactly one constructor in the {@code ViewModel} must be annotated with {@code Inject}. |
| * |
| * <p>Only dependencies available in the {@link dagger.hilt.android.components.ViewModelComponent} |
| * can be injected into the {@code ViewModel}. |
| * |
| * <p> |
| * |
| * @see dagger.hilt.android.components.ViewModelComponent |
| */ |
| @Target(ElementType.TYPE) |
| @Retention(RetentionPolicy.CLASS) |
| @GeneratesRootInput |
| public @interface HiltViewModel {} |