| /* |
| * Copyright (C) 2014 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.internal.codegen; |
| |
| import com.google.auto.common.MoreElements; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Sets; |
| import dagger.assisted.AssistedInject; |
| import dagger.internal.codegen.binding.InjectBindingRegistry; |
| import dagger.internal.codegen.validation.TypeCheckingProcessingStep; |
| import java.lang.annotation.Annotation; |
| import java.util.Set; |
| import javax.inject.Inject; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.ElementVisitor; |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.element.VariableElement; |
| import javax.lang.model.util.ElementKindVisitor8; |
| |
| /** |
| * An annotation processor for generating Dagger implementation code based on the {@link Inject} |
| * annotation. |
| */ |
| // TODO(gak): add some error handling for bad source files |
| final class InjectProcessingStep extends TypeCheckingProcessingStep<Element> { |
| private final ElementVisitor<Void, Void> visitor; |
| private final Set<Element> processedElements = Sets.newLinkedHashSet(); |
| |
| @Inject |
| InjectProcessingStep(InjectBindingRegistry injectBindingRegistry) { |
| super(e -> e); |
| this.visitor = |
| new ElementKindVisitor8<Void, Void>() { |
| @Override |
| public Void visitExecutableAsConstructor( |
| ExecutableElement constructorElement, Void aVoid) { |
| injectBindingRegistry.tryRegisterConstructor(constructorElement); |
| return null; |
| } |
| |
| @Override |
| public Void visitVariableAsField(VariableElement fieldElement, Void aVoid) { |
| injectBindingRegistry.tryRegisterMembersInjectedType( |
| MoreElements.asType(fieldElement.getEnclosingElement())); |
| return null; |
| } |
| |
| @Override |
| public Void visitExecutableAsMethod(ExecutableElement methodElement, Void aVoid) { |
| injectBindingRegistry.tryRegisterMembersInjectedType( |
| MoreElements.asType(methodElement.getEnclosingElement())); |
| return null; |
| } |
| }; |
| } |
| |
| @Override |
| public Set<Class<? extends Annotation>> annotations() { |
| return ImmutableSet.of(Inject.class, AssistedInject.class); |
| } |
| |
| @Override |
| protected void process( |
| Element injectElement, ImmutableSet<Class<? extends Annotation>> annotations) { |
| // Only process an element once to avoid getting duplicate errors when an element is annotated |
| // with multiple inject annotations. |
| if (processedElements.contains(injectElement)) { |
| return; |
| } |
| |
| injectElement.accept(visitor, null); |
| |
| processedElements.add(injectElement); |
| } |
| } |