78 lines
2.6 KiB
Java
78 lines
2.6 KiB
Java
/*
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* Copyright (C) 2016 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.validation;
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import static javax.lang.model.element.ElementKind.METHOD;
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import static javax.lang.model.element.Modifier.ABSTRACT;
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import static javax.lang.model.type.TypeKind.DECLARED;
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import static javax.lang.model.type.TypeKind.TYPEVAR;
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import com.google.auto.common.MoreElements;
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import dagger.internal.codegen.binding.InjectionAnnotations;
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import java.util.Optional;
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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.ExecutableElement;
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import javax.lang.model.element.VariableElement;
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import javax.lang.model.type.TypeKind;
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import javax.lang.model.type.TypeMirror;
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final class BindsInstanceParameterValidator extends BindsInstanceElementValidator<VariableElement> {
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@Inject
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BindsInstanceParameterValidator(InjectionAnnotations injectionAnnotations) {
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super(injectionAnnotations);
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}
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@Override
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protected ElementValidator elementValidator(VariableElement element) {
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return new Validator(element);
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}
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private class Validator extends ElementValidator {
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Validator(VariableElement element) {
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super(element);
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}
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@Override
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protected void checkAdditionalProperties() {
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Element enclosing = element.getEnclosingElement();
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if (!enclosing.getKind().equals(METHOD)) {
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report.addError(
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"@BindsInstance should only be applied to methods or parameters of methods");
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return;
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}
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ExecutableElement method = MoreElements.asExecutable(enclosing);
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if (!method.getModifiers().contains(ABSTRACT)) {
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report.addError("@BindsInstance parameters may only be used in abstract methods");
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}
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TypeKind returnKind = method.getReturnType().getKind();
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if (!(returnKind.equals(DECLARED) || returnKind.equals(TYPEVAR))) {
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report.addError(
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"@BindsInstance parameters may not be used in methods with a void, array or primitive "
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+ "return type");
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}
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}
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@Override
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protected Optional<TypeMirror> bindingElementType() {
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return Optional.of(element.asType());
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}
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}
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}
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