86 lines
3.3 KiB
Java
86 lines
3.3 KiB
Java
/*
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* Copyright (C) 2018 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.squareup.javapoet.MethodSpec.constructorBuilder;
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import static com.squareup.javapoet.MethodSpec.methodBuilder;
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import static com.squareup.javapoet.TypeSpec.classBuilder;
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import static dagger.internal.codegen.ModuleKind.checkIsModule;
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import static dagger.internal.codegen.ModuleProxies.nonPublicNullaryConstructor;
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import static javax.lang.model.element.Modifier.FINAL;
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import static javax.lang.model.element.Modifier.PRIVATE;
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import static javax.lang.model.element.Modifier.PUBLIC;
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import static javax.lang.model.element.Modifier.STATIC;
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import com.squareup.javapoet.ClassName;
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import com.squareup.javapoet.TypeSpec;
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import dagger.internal.codegen.langmodel.DaggerElements;
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import java.util.Optional;
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import javax.annotation.processing.Filer;
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import javax.inject.Inject;
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import javax.lang.model.SourceVersion;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.TypeElement;
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/**
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* Generates a {@code public static} method that calls {@code new SomeModule()} for modules that
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* don't have {@linkplain ModuleProxies#nonPublicNullaryConstructor(TypeElement,
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* DaggerElements) publicly accessible constructors}.
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*/
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// TODO(dpb): See if this can become a SourceFileGenerator<ModuleDescriptor> instead. Doing so may
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// cause ModuleProcessingStep to defer elements multiple times.
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final class ModuleConstructorProxyGenerator extends SourceFileGenerator<TypeElement> {
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private final DaggerElements elements;
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@Inject
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ModuleConstructorProxyGenerator(
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Filer filer, DaggerElements elements, SourceVersion sourceVersion) {
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super(filer, elements, sourceVersion);
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this.elements = elements;
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}
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@Override
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ClassName nameGeneratedType(TypeElement moduleElement) {
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return ModuleProxies.constructorProxyTypeName(moduleElement);
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}
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@Override
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Element originatingElement(TypeElement moduleElement) {
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return moduleElement;
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}
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@Override
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Optional<TypeSpec.Builder> write(ClassName generatedTypeName, TypeElement moduleElement) {
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checkIsModule(moduleElement);
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return nonPublicNullaryConstructor(moduleElement, elements).isPresent()
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? Optional.of(buildProxy(generatedTypeName, moduleElement))
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: Optional.empty();
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}
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private TypeSpec.Builder buildProxy(ClassName generatedTypeName, TypeElement moduleElement) {
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return classBuilder(generatedTypeName)
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.addModifiers(PUBLIC, FINAL)
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.addMethod(constructorBuilder().addModifiers(PRIVATE).build())
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.addMethod(
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methodBuilder("newInstance")
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.addModifiers(PUBLIC, STATIC)
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.returns(ClassName.get(moduleElement))
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.addStatement("return new $T()", moduleElement)
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.build());
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}
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}
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