108 lines
3.8 KiB
Java
108 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.writing;
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import static com.squareup.javapoet.MethodSpec.constructorBuilder;
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import static dagger.internal.codegen.binding.BindingRequest.bindingRequest;
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import static dagger.model.RequestKind.INSTANCE;
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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 com.squareup.javapoet.ClassName;
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import com.squareup.javapoet.CodeBlock;
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import com.squareup.javapoet.TypeName;
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import com.squareup.javapoet.TypeSpec;
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import dagger.internal.codegen.binding.ContributionBinding;
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import dagger.internal.codegen.javapoet.Expression;
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import dagger.internal.codegen.langmodel.DaggerTypes;
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import dagger.model.Key;
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import javax.inject.Provider;
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import javax.lang.model.type.TypeMirror;
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/**
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* Generates {@linkplain BindingExpression binding expressions} for a binding that is represented by
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* an inner {@code SwitchingProvider} class.
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*/
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final class InnerSwitchingProviders extends SwitchingProviders {
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private final ComponentBindingExpressions componentBindingExpressions;
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private final DaggerTypes types;
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InnerSwitchingProviders(
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ComponentImplementation componentImplementation,
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ComponentBindingExpressions componentBindingExpressions,
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DaggerTypes types) {
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super(componentImplementation, types);
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this.componentBindingExpressions = componentBindingExpressions;
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this.types = types;
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}
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/**
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* Returns the binding expression for a binding that satisfies a {@link Provider} requests with a
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* inner {@code SwitchingProvider} class.
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*/
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BindingExpression newBindingExpression(ContributionBinding binding) {
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return new BindingExpression() {
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@Override
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Expression getDependencyExpression(ClassName requestingClass) {
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return getProviderExpression(new SwitchCase(binding, requestingClass));
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}
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};
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}
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@Override
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protected TypeSpec createSwitchingProviderType(TypeSpec.Builder builder) {
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return builder
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.addModifiers(PRIVATE, FINAL)
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.addField(TypeName.INT, "id", PRIVATE, FINAL)
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.addMethod(
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constructorBuilder()
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.addParameter(TypeName.INT, "id")
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.addStatement("this.id = id")
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.build())
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.build();
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}
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private final class SwitchCase implements SwitchingProviders.SwitchCase {
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private final ContributionBinding binding;
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private final ClassName requestingClass;
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SwitchCase(ContributionBinding binding, ClassName requestingClass) {
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this.binding = binding;
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this.requestingClass = requestingClass;
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}
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@Override
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public Key key() {
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return binding.key();
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}
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@Override
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public Expression getProviderExpression(ClassName switchingProviderClass, int switchId) {
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TypeMirror instanceType = types.accessibleType(binding.contributedType(), requestingClass);
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return Expression.create(
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types.wrapType(instanceType, Provider.class),
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CodeBlock.of("new $T<>($L)", switchingProviderClass, switchId));
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}
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@Override
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public Expression getReturnExpression(ClassName switchingProviderClass) {
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return componentBindingExpressions.getDependencyExpression(
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bindingRequest(binding.key(), INSTANCE), switchingProviderClass);
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}
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}
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}
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