90 lines
3.2 KiB
Java
90 lines
3.2 KiB
Java
/*
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* Copyright (C) 2014 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.internal.codegen;
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import com.google.auto.common.MoreElements;
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import com.google.common.collect.ImmutableSet;
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import com.google.common.collect.Sets;
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import dagger.assisted.AssistedInject;
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import dagger.internal.codegen.binding.InjectBindingRegistry;
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import dagger.internal.codegen.validation.TypeCheckingProcessingStep;
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import java.lang.annotation.Annotation;
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import java.util.Set;
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import javax.inject.Inject;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.ElementVisitor;
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import javax.lang.model.element.ExecutableElement;
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import javax.lang.model.element.VariableElement;
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import javax.lang.model.util.ElementKindVisitor8;
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/**
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* An annotation processor for generating Dagger implementation code based on the {@link Inject}
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* annotation.
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*/
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// TODO(gak): add some error handling for bad source files
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final class InjectProcessingStep extends TypeCheckingProcessingStep<Element> {
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private final ElementVisitor<Void, Void> visitor;
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private final Set<Element> processedElements = Sets.newLinkedHashSet();
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@Inject
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InjectProcessingStep(InjectBindingRegistry injectBindingRegistry) {
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super(e -> e);
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this.visitor =
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new ElementKindVisitor8<Void, Void>() {
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@Override
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public Void visitExecutableAsConstructor(
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ExecutableElement constructorElement, Void aVoid) {
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injectBindingRegistry.tryRegisterConstructor(constructorElement);
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return null;
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}
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@Override
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public Void visitVariableAsField(VariableElement fieldElement, Void aVoid) {
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injectBindingRegistry.tryRegisterMembersInjectedType(
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MoreElements.asType(fieldElement.getEnclosingElement()));
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return null;
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}
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@Override
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public Void visitExecutableAsMethod(ExecutableElement methodElement, Void aVoid) {
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injectBindingRegistry.tryRegisterMembersInjectedType(
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MoreElements.asType(methodElement.getEnclosingElement()));
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return null;
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}
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};
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}
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@Override
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public Set<Class<? extends Annotation>> annotations() {
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return ImmutableSet.of(Inject.class, AssistedInject.class);
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}
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@Override
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protected void process(
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Element injectElement, ImmutableSet<Class<? extends Annotation>> annotations) {
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// Only process an element once to avoid getting duplicate errors when an element is annotated
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// with multiple inject annotations.
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if (processedElements.contains(injectElement)) {
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return;
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}
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injectElement.accept(visitor, null);
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processedElements.add(injectElement);
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}
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}
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