| /* |
| * Copyright (C) 2016 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.validation; |
| |
| import static dagger.internal.codegen.langmodel.DaggerElements.getAnnotationMirror; |
| import static javax.tools.Diagnostic.Kind.ERROR; |
| |
| import com.google.auto.common.MoreElements; |
| import com.google.common.collect.ImmutableSet; |
| import dagger.multibindings.ElementsIntoSet; |
| import dagger.multibindings.IntoMap; |
| import dagger.multibindings.IntoSet; |
| import java.lang.annotation.Annotation; |
| import java.util.Set; |
| import javax.annotation.processing.Messager; |
| import javax.inject.Inject; |
| import javax.lang.model.element.ExecutableElement; |
| |
| /** |
| * Processing step that verifies that {@link IntoSet}, {@link ElementsIntoSet} and {@link IntoMap} |
| * are not present on non-binding methods. |
| */ |
| public final class MultibindingAnnotationsProcessingStep |
| extends TypeCheckingProcessingStep<ExecutableElement> { |
| private final AnyBindingMethodValidator anyBindingMethodValidator; |
| private final Messager messager; |
| |
| @Inject |
| MultibindingAnnotationsProcessingStep( |
| AnyBindingMethodValidator anyBindingMethodValidator, Messager messager) { |
| super(MoreElements::asExecutable); |
| this.anyBindingMethodValidator = anyBindingMethodValidator; |
| this.messager = messager; |
| } |
| |
| @Override |
| public Set<? extends Class<? extends Annotation>> annotations() { |
| return ImmutableSet.of(IntoSet.class, ElementsIntoSet.class, IntoMap.class); |
| } |
| |
| @Override |
| protected void process( |
| ExecutableElement method, ImmutableSet<Class<? extends Annotation>> annotations) { |
| if (!anyBindingMethodValidator.isBindingMethod(method)) { |
| annotations.forEach( |
| annotation -> |
| messager.printMessage( |
| ERROR, |
| "Multibinding annotations may only be on @Provides, @Produces, or @Binds methods", |
| method, |
| getAnnotationMirror(method, annotation).get())); |
| } |
| } |
| } |