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