| /* |
| * Copyright (C) 2021 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 static com.google.auto.common.MoreTypes.asDeclared; |
| import static com.google.common.base.Preconditions.checkState; |
| import static dagger.internal.codegen.langmodel.DaggerElements.closestEnclosingTypeElement; |
| |
| import com.google.auto.common.MoreElements; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| import dagger.assisted.AssistedInject; |
| import dagger.internal.codegen.binding.AssistedInjectionAnnotations; |
| import dagger.internal.codegen.binding.AssistedInjectionAnnotations.AssistedParameter; |
| import dagger.internal.codegen.langmodel.DaggerTypes; |
| import dagger.internal.codegen.validation.TypeCheckingProcessingStep; |
| import dagger.internal.codegen.validation.ValidationReport; |
| import java.lang.annotation.Annotation; |
| import java.util.HashSet; |
| import java.util.Set; |
| import javax.annotation.processing.Messager; |
| import javax.inject.Inject; |
| import javax.lang.model.element.ElementKind; |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.type.DeclaredType; |
| |
| /** An annotation processor for {@link dagger.assisted.AssistedInject}-annotated elements. */ |
| final class AssistedInjectProcessingStep extends TypeCheckingProcessingStep<ExecutableElement> { |
| private final DaggerTypes types; |
| private final Messager messager; |
| |
| @Inject |
| AssistedInjectProcessingStep(DaggerTypes types, Messager messager) { |
| super(MoreElements::asExecutable); |
| this.types = types; |
| this.messager = messager; |
| } |
| |
| @Override |
| public ImmutableSet<Class<? extends Annotation>> annotations() { |
| return ImmutableSet.of(AssistedInject.class); |
| } |
| |
| @Override |
| protected void process( |
| ExecutableElement assistedInjectElement, |
| ImmutableSet<Class<? extends Annotation>> annotations) { |
| new AssistedInjectValidator().validate(assistedInjectElement).printMessagesTo(messager); |
| } |
| |
| private final class AssistedInjectValidator { |
| ValidationReport<ExecutableElement> validate(ExecutableElement constructor) { |
| checkState(constructor.getKind() == ElementKind.CONSTRUCTOR); |
| ValidationReport.Builder<ExecutableElement> report = ValidationReport.about(constructor); |
| |
| DeclaredType assistedInjectType = |
| asDeclared(closestEnclosingTypeElement(constructor).asType()); |
| ImmutableList<AssistedParameter> assistedParameters = |
| AssistedInjectionAnnotations.assistedInjectAssistedParameters(assistedInjectType, types); |
| |
| Set<AssistedParameter> uniqueAssistedParameters = new HashSet<>(); |
| for (AssistedParameter assistedParameter : assistedParameters) { |
| if (!uniqueAssistedParameters.add(assistedParameter)) { |
| report.addError( |
| String.format("@AssistedInject constructor has duplicate @Assisted type: %s. " |
| + "Consider setting an identifier on the parameter by using " |
| + "@Assisted(\"identifier\") in both the factory and @AssistedInject constructor", |
| assistedParameter), |
| assistedParameter.variableElement()); |
| } |
| } |
| |
| return report.build(); |
| } |
| } |
| } |