85 lines
3.4 KiB
Java
85 lines
3.4 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.writing;
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import static dagger.internal.codegen.javapoet.TypeNames.DOUBLE_CHECK;
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import static dagger.internal.codegen.javapoet.TypeNames.SINGLE_CHECK;
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import com.squareup.javapoet.CodeBlock;
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import dagger.assisted.Assisted;
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import dagger.assisted.AssistedFactory;
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import dagger.assisted.AssistedInject;
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import dagger.internal.codegen.binding.Binding;
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import dagger.internal.codegen.binding.BindingGraph;
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import dagger.internal.codegen.binding.ProvisionBinding;
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import dagger.internal.codegen.writing.FrameworkFieldInitializer.FrameworkInstanceCreationExpression;
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import dagger.spi.model.BindingKind;
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/**
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* An object that initializes a framework-type component field for a binding using instances created
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* by switching providers.
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*/
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final class SwitchingProviderInstanceSupplier implements FrameworkInstanceSupplier {
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private final FrameworkInstanceSupplier frameworkInstanceSupplier;
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@AssistedInject
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SwitchingProviderInstanceSupplier(
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@Assisted ProvisionBinding binding,
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SwitchingProviders switchingProviders,
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ExperimentalSwitchingProviders experimentalSwitchingProviders,
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BindingGraph graph,
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ComponentImplementation componentImplementation,
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UnscopedDirectInstanceRequestRepresentationFactory
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unscopedDirectInstanceRequestRepresentationFactory) {
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FrameworkInstanceCreationExpression frameworkInstanceCreationExpression =
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componentImplementation.compilerMode().isExperimentalMergedMode()
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? experimentalSwitchingProviders.newFrameworkInstanceCreationExpression(
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binding, unscopedDirectInstanceRequestRepresentationFactory.create(binding))
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: switchingProviders.newFrameworkInstanceCreationExpression(
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binding, unscopedDirectInstanceRequestRepresentationFactory.create(binding));
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this.frameworkInstanceSupplier =
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new FrameworkFieldInitializer(
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componentImplementation, binding, scope(binding, frameworkInstanceCreationExpression));
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}
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@Override
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public MemberSelect memberSelect() {
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return frameworkInstanceSupplier.memberSelect();
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}
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private FrameworkInstanceCreationExpression scope(
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Binding binding, FrameworkInstanceCreationExpression unscoped) {
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// Caching assisted factory provider, so that there won't be new factory created for each
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// provider.get() call.
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if (!binding.scope().isPresent() && !binding.kind().equals(BindingKind.ASSISTED_FACTORY)) {
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return unscoped;
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}
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return () ->
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CodeBlock.of(
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"$T.provider($L)",
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binding.scope().isPresent()
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? (binding.scope().get().isReusable() ? SINGLE_CHECK : DOUBLE_CHECK)
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: SINGLE_CHECK,
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unscoped.creationExpression());
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}
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@AssistedFactory
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static interface Factory {
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SwitchingProviderInstanceSupplier create(ProvisionBinding binding);
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}
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}
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