69 lines
2.6 KiB
Java
69 lines
2.6 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.writing;
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import static com.google.common.collect.Iterables.getOnlyElement;
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import static dagger.internal.codegen.binding.BindingRequest.bindingRequest;
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import com.squareup.javapoet.CodeBlock;
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import dagger.internal.codegen.binding.ContributionBinding;
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import dagger.internal.codegen.writing.FrameworkFieldInitializer.FrameworkInstanceCreationExpression;
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/**
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* A {@link FrameworkInstanceCreationExpression} for {@link dagger.model.BindingKind#OPTIONAL
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* optional bindings}.
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*/
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final class OptionalFactoryInstanceCreationExpression
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implements FrameworkInstanceCreationExpression {
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private final OptionalFactories optionalFactories;
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private final ContributionBinding binding;
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private final ComponentImplementation componentImplementation;
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private final ComponentBindingExpressions componentBindingExpressions;
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OptionalFactoryInstanceCreationExpression(
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OptionalFactories optionalFactories,
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ContributionBinding binding,
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ComponentImplementation componentImplementation,
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ComponentBindingExpressions componentBindingExpressions) {
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this.optionalFactories = optionalFactories;
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this.binding = binding;
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this.componentImplementation = componentImplementation;
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this.componentBindingExpressions = componentBindingExpressions;
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}
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@Override
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public CodeBlock creationExpression() {
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return binding.dependencies().isEmpty()
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? optionalFactories.absentOptionalProvider(binding)
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: optionalFactories.presentOptionalFactory(
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binding,
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componentBindingExpressions
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.getDependencyExpression(
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bindingRequest(
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getOnlyElement(binding.dependencies()).key(), binding.frameworkType()),
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componentImplementation.name())
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.codeBlock());
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}
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@Override
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public boolean useInnerSwitchingProvider() {
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// Share providers for empty optionals from OptionalFactories so we don't have numerous
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// switch cases that all return Optional.empty().
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return !binding.dependencies().isEmpty();
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}
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}
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