80 lines
3.1 KiB
Java
80 lines
3.1 KiB
Java
/*
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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 dagger.internal.codegen.binding.AssistedInjectionAnnotations.assistedInjectAssistedParameters;
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import androidx.room.compiler.processing.XConstructorElement;
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import androidx.room.compiler.processing.XMessager;
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import androidx.room.compiler.processing.XType;
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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 com.squareup.javapoet.ClassName;
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import dagger.internal.codegen.binding.AssistedInjectionAnnotations.AssistedParameter;
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import dagger.internal.codegen.javapoet.TypeNames;
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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.util.HashSet;
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import java.util.Set;
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import javax.inject.Inject;
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/** An annotation processor for {@link dagger.assisted.AssistedInject}-annotated elements. */
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final class AssistedInjectProcessingStep extends TypeCheckingProcessingStep<XConstructorElement> {
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private final XMessager messager;
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@Inject
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AssistedInjectProcessingStep(XMessager messager) {
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this.messager = messager;
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}
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@Override
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public ImmutableSet<ClassName> annotationClassNames() {
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return ImmutableSet.of(TypeNames.ASSISTED_INJECT);
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}
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@Override
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protected void process(
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XConstructorElement assistedInjectElement, ImmutableSet<ClassName> 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 validate(XConstructorElement constructor) {
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ValidationReport.Builder report = ValidationReport.about(constructor);
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XType assistedInjectType = constructor.getEnclosingElement().getType();
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ImmutableList<AssistedParameter> assistedParameters =
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assistedInjectAssistedParameters(assistedInjectType);
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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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String.format(
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"@AssistedInject constructor has duplicate @Assisted type: %s. Consider setting"
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+ " an identifier on the parameter by using @Assisted(\"identifier\") in both"
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+ " the factory and @AssistedInject constructor",
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assistedParameter),
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assistedParameter.element());
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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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