96 lines
3.8 KiB
Java
96 lines
3.8 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 com.google.common.collect.ImmutableSet;
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import com.google.common.collect.Sets;
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import com.squareup.javapoet.ClassName;
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import com.squareup.javapoet.CodeBlock;
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import dagger.internal.codegen.ModifiableBindingMethods.ModifiableBindingMethod;
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import dagger.internal.codegen.javapoet.Expression;
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import dagger.model.DependencyRequest;
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import dagger.model.Key;
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import dagger.model.RequestKind;
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import java.util.Optional;
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import java.util.Set;
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/** An abstract base class for multibinding {@link BindingExpression}s. */
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abstract class MultibindingExpression extends SimpleInvocationBindingExpression {
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private final ProvisionBinding binding;
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private final ComponentImplementation componentImplementation;
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MultibindingExpression(
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ResolvedBindings resolvedBindings, ComponentImplementation componentImplementation) {
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super(resolvedBindings);
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this.componentImplementation = componentImplementation;
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this.binding = (ProvisionBinding) resolvedBindings.contributionBinding();
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}
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@Override
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Expression getDependencyExpression(ClassName requestingClass) {
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Expression expression = buildDependencyExpression(requestingClass);
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componentImplementation.registerImplementedMultibinding(binding, bindingRequest());
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return expression;
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}
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/**
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* Returns an expression that evaluates to the value of a multibinding request for the given
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* requesting class.
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*/
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protected abstract Expression buildDependencyExpression(ClassName requestingClass);
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/**
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* Returns the subset of {@code dependencies} that represent multibinding contributions that were
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* not included in a superclass implementation of this multibinding method. This is relevant only
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* for ahead-of-time subcomponents. When not generating ahead-of-time subcomponents there is only
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* one implementation of a multibinding expression and all {@link DependencyRequest}s from the
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* argment are returned.
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*/
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protected Set<DependencyRequest> getNewContributions(
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ImmutableSet<DependencyRequest> dependencies) {
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ImmutableSet<Key> superclassContributions = superclassContributions();
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return Sets.filter(
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dependencies, dependency -> !superclassContributions.contains(dependency.key()));
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}
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/**
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* Returns the {@link CodeBlock} representing a call to a superclass implementation of the
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* modifiable binding method that encapsulates this binding, if it exists. This is only possible
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* when generating ahead-of-time subcomponents.
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*/
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protected Optional<CodeBlock> superMethodCall() {
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if (componentImplementation.superclassImplementation().isPresent()) {
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Optional<ModifiableBindingMethod> method =
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componentImplementation.getModifiableBindingMethod(bindingRequest());
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if (method.isPresent()) {
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if (!superclassContributions().isEmpty()) {
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return Optional.of(CodeBlock.of("super.$L()", method.get().methodSpec().name));
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}
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}
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}
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return Optional.empty();
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}
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private BindingRequest bindingRequest() {
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return BindingRequest.bindingRequest(binding.key(), RequestKind.INSTANCE);
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}
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private ImmutableSet<Key> superclassContributions() {
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return componentImplementation.superclassContributionsMade(bindingRequest());
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}
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}
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