| /* |
| * Copyright (C) 2019 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.processor.internal.androidentrypoint; |
| |
| import com.squareup.javapoet.ClassName; |
| import com.squareup.javapoet.FieldSpec; |
| import com.squareup.javapoet.JavaFile; |
| import com.squareup.javapoet.MethodSpec; |
| import com.squareup.javapoet.TypeSpec; |
| import com.squareup.javapoet.TypeVariableName; |
| import dagger.hilt.android.processor.internal.AndroidClassNames; |
| import dagger.hilt.processor.internal.ClassNames; |
| import dagger.hilt.processor.internal.Processors; |
| import java.io.IOException; |
| import javax.annotation.processing.ProcessingEnvironment; |
| import javax.lang.model.element.Modifier; |
| |
| /** Generates an Hilt Fragment class for the @AndroidEntryPoint annotated class. */ |
| public final class FragmentGenerator { |
| private static final FieldSpec COMPONENT_CONTEXT_FIELD = |
| FieldSpec.builder(AndroidClassNames.CONTEXT_WRAPPER, "componentContext") |
| .addModifiers(Modifier.PRIVATE) |
| .build(); |
| |
| private final ProcessingEnvironment env; |
| private final AndroidEntryPointMetadata metadata; |
| private final ClassName generatedClassName; |
| |
| public FragmentGenerator( |
| ProcessingEnvironment env, |
| AndroidEntryPointMetadata metadata ) { |
| this.env = env; |
| this.metadata = metadata; |
| generatedClassName = metadata.generatedClassName(); |
| } |
| |
| public void generate() throws IOException { |
| JavaFile.builder(generatedClassName.packageName(), createTypeSpec()) |
| .build() |
| .writeTo(env.getFiler()); |
| } |
| |
| // @Generated("FragmentGenerator") |
| // abstract class Hilt_$CLASS extends $BASE implements ComponentManager<?> { |
| // ... |
| // } |
| TypeSpec createTypeSpec() { |
| TypeSpec.Builder builder = |
| TypeSpec.classBuilder(generatedClassName.simpleName()) |
| .addOriginatingElement(metadata.element()) |
| .superclass(metadata.baseClassName()) |
| .addModifiers(metadata.generatedClassModifiers()) |
| .addField(COMPONENT_CONTEXT_FIELD) |
| .addMethod(onAttachContextMethod()) |
| .addMethod(onAttachActivityMethod()) |
| .addMethod(initializeComponentContextMethod()) |
| .addMethod(getContextMethod()) |
| .addMethod(inflatorMethod()); |
| |
| Generators.addGeneratedBaseClassJavadoc(builder, AndroidClassNames.ANDROID_ENTRY_POINT); |
| Processors.addGeneratedAnnotation(builder, env, getClass()); |
| Generators.copyLintAnnotations(metadata.element(), builder); |
| Generators.addSuppressAnnotation(builder, "deprecation"); |
| Generators.copyConstructors(metadata.baseElement(), builder); |
| |
| metadata.baseElement().getTypeParameters().stream() |
| .map(TypeVariableName::get) |
| .forEachOrdered(builder::addTypeVariable); |
| |
| Generators.addComponentOverride(metadata, builder); |
| |
| Generators.addInjectionMethods(metadata, builder); |
| |
| if (!metadata.overridesAndroidEntryPointClass() ) { |
| builder.addMethod(getDefaultViewModelProviderFactory()); |
| } |
| |
| return builder.build(); |
| } |
| |
| // @CallSuper |
| // @Override |
| // public void onAttach(Activity activity) { |
| // super.onAttach(activity); |
| // initializeComponentContext(); |
| // } |
| private static MethodSpec onAttachContextMethod() { |
| return MethodSpec.methodBuilder("onAttach") |
| .addAnnotation(Override.class) |
| .addAnnotation(AndroidClassNames.CALL_SUPER) |
| .addModifiers(Modifier.PUBLIC) |
| .addParameter(AndroidClassNames.CONTEXT, "context") |
| .addStatement("super.onAttach(context)") |
| .addStatement("initializeComponentContext()") |
| .build(); |
| } |
| |
| // @CallSuper |
| // @Override |
| // public void onAttach(Activity activity) { |
| // super.onAttach(activity); |
| // Preconditions.checkState( |
| // componentContext == null || FragmentComponentManager.findActivity( |
| // componentContext) == activity, "..."); |
| // initializeComponentContext(); |
| // } |
| private static MethodSpec onAttachActivityMethod() { |
| return MethodSpec.methodBuilder("onAttach") |
| .addAnnotation(Override.class) |
| .addAnnotation(AndroidClassNames.CALL_SUPER) |
| .addAnnotation(AndroidClassNames.MAIN_THREAD) |
| .addModifiers(Modifier.PUBLIC) |
| .addParameter(AndroidClassNames.ACTIVITY, "activity") |
| .addStatement("super.onAttach(activity)") |
| .addStatement( |
| "$T.checkState($N == null || $T.findActivity($N) == activity, $S)", |
| ClassNames.PRECONDITIONS, |
| COMPONENT_CONTEXT_FIELD, |
| AndroidClassNames.FRAGMENT_COMPONENT_MANAGER, |
| COMPONENT_CONTEXT_FIELD, |
| "onAttach called multiple times with different Context! " |
| + "Hilt Fragments should not be retained.") |
| .addStatement("initializeComponentContext()") |
| .build(); |
| } |
| |
| // private void initializeComponentContext() { |
| // // Only inject on the first call to onAttach. |
| // if (componentContext == null) { |
| // // Note: The LayoutInflater provided by this componentContext may be different from super |
| // // Fragment's because we are getting it from base context instead of cloning from super |
| // // Fragment's LayoutInflater. |
| // componentContext = FragmentComponentManager.createContextWrapper(super.getContext(), this); |
| // inject(); |
| // } |
| // } |
| private MethodSpec initializeComponentContextMethod() { |
| return MethodSpec.methodBuilder("initializeComponentContext") |
| .addModifiers(Modifier.PRIVATE) |
| .addComment("Only inject on the first call to onAttach.") |
| .beginControlFlow("if ($N == null)", COMPONENT_CONTEXT_FIELD) |
| .addComment( |
| "Note: The LayoutInflater provided by this componentContext may be different from" |
| + " super Fragment's because we getting it from base context instead of cloning" |
| + " from the super Fragment's LayoutInflater.") |
| .addStatement( |
| "$N = $T.createContextWrapper(super.getContext(), this)", |
| COMPONENT_CONTEXT_FIELD, |
| metadata.componentManager()) |
| .addStatement("inject()") |
| .endControlFlow() |
| .build(); |
| } |
| |
| // @Override |
| // public Context getContext() { |
| // return componentContext; |
| // } |
| private static MethodSpec getContextMethod() { |
| return MethodSpec.methodBuilder("getContext") |
| .returns(AndroidClassNames.CONTEXT) |
| .addAnnotation(Override.class) |
| .addModifiers(Modifier.PUBLIC) |
| .addStatement("return $N", COMPONENT_CONTEXT_FIELD) |
| .build(); |
| } |
| |
| // @Override |
| // public LayoutInflater onGetLayoutInflater(Bundle savedInstanceState) { |
| // LayoutInflater inflater = super.onGetLayoutInflater(savedInstanceState); |
| // return LayoutInflater.from(FragmentComponentManager.createContextWrapper(inflater, this)); |
| // } |
| private MethodSpec inflatorMethod() { |
| return MethodSpec.methodBuilder("onGetLayoutInflater") |
| .addAnnotation(Override.class) |
| .addModifiers(Modifier.PUBLIC) |
| .addParameter(AndroidClassNames.BUNDLE, "savedInstanceState") |
| .returns(AndroidClassNames.LAYOUT_INFLATER) |
| .addStatement( |
| "$T inflater = super.onGetLayoutInflater(savedInstanceState)", |
| AndroidClassNames.LAYOUT_INFLATER) |
| .addStatement( |
| "return $T.from($T.createContextWrapper(inflater, this))", |
| AndroidClassNames.LAYOUT_INFLATER, |
| metadata.componentManager()) |
| .build(); |
| } |
| |
| // @Override |
| // public ViewModelProvider.Factory getDefaultViewModelProviderFactory() { |
| // return DefaultViewModelFactories.getFragmentFactory( |
| // this, super.getDefaultViewModelProviderFactory()); |
| // } |
| private MethodSpec getDefaultViewModelProviderFactory() { |
| return MethodSpec.methodBuilder("getDefaultViewModelProviderFactory") |
| .addAnnotation(Override.class) |
| .addModifiers(Modifier.PUBLIC) |
| .returns(AndroidClassNames.VIEW_MODEL_PROVIDER_FACTORY) |
| .addStatement( |
| "return $T.getFragmentFactory(this, super.getDefaultViewModelProviderFactory())", |
| AndroidClassNames.DEFAULT_VIEW_MODEL_FACTORIES) |
| .build(); |
| } |
| } |