| /* |
| * Copyright (C) 2018 The Dagger Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package dagger.internal.codegen.writing; |
| |
| import static com.squareup.javapoet.MethodSpec.constructorBuilder; |
| import static dagger.internal.codegen.binding.BindingRequest.bindingRequest; |
| import static dagger.model.RequestKind.INSTANCE; |
| import static javax.lang.model.element.Modifier.FINAL; |
| import static javax.lang.model.element.Modifier.PRIVATE; |
| |
| import com.squareup.javapoet.ClassName; |
| import com.squareup.javapoet.CodeBlock; |
| import com.squareup.javapoet.TypeName; |
| import com.squareup.javapoet.TypeSpec; |
| import dagger.internal.codegen.binding.ContributionBinding; |
| import dagger.internal.codegen.javapoet.Expression; |
| import dagger.internal.codegen.langmodel.DaggerTypes; |
| import dagger.model.Key; |
| import javax.inject.Provider; |
| import javax.lang.model.type.TypeMirror; |
| |
| /** |
| * Generates {@linkplain BindingExpression binding expressions} for a binding that is represented by |
| * an inner {@code SwitchingProvider} class. |
| */ |
| final class InnerSwitchingProviders extends SwitchingProviders { |
| private final ComponentBindingExpressions componentBindingExpressions; |
| private final DaggerTypes types; |
| |
| InnerSwitchingProviders( |
| ComponentImplementation componentImplementation, |
| ComponentBindingExpressions componentBindingExpressions, |
| DaggerTypes types) { |
| super(componentImplementation, types); |
| this.componentBindingExpressions = componentBindingExpressions; |
| this.types = types; |
| } |
| |
| /** |
| * Returns the binding expression for a binding that satisfies a {@link Provider} requests with a |
| * inner {@code SwitchingProvider} class. |
| */ |
| BindingExpression newBindingExpression(ContributionBinding binding) { |
| return new BindingExpression() { |
| @Override |
| Expression getDependencyExpression(ClassName requestingClass) { |
| return getProviderExpression(new SwitchCase(binding, requestingClass)); |
| } |
| }; |
| } |
| |
| @Override |
| protected TypeSpec createSwitchingProviderType(TypeSpec.Builder builder) { |
| return builder |
| .addModifiers(PRIVATE, FINAL) |
| .addField(TypeName.INT, "id", PRIVATE, FINAL) |
| .addMethod( |
| constructorBuilder() |
| .addParameter(TypeName.INT, "id") |
| .addStatement("this.id = id") |
| .build()) |
| .build(); |
| } |
| |
| private final class SwitchCase implements SwitchingProviders.SwitchCase { |
| private final ContributionBinding binding; |
| private final ClassName requestingClass; |
| |
| SwitchCase(ContributionBinding binding, ClassName requestingClass) { |
| this.binding = binding; |
| this.requestingClass = requestingClass; |
| } |
| |
| @Override |
| public Key key() { |
| return binding.key(); |
| } |
| |
| @Override |
| public Expression getProviderExpression(ClassName switchingProviderClass, int switchId) { |
| TypeMirror instanceType = types.accessibleType(binding.contributedType(), requestingClass); |
| return Expression.create( |
| types.wrapType(instanceType, Provider.class), |
| CodeBlock.of("new $T<>($L)", switchingProviderClass, switchId)); |
| } |
| |
| @Override |
| public Expression getReturnExpression(ClassName switchingProviderClass) { |
| return componentBindingExpressions.getDependencyExpression( |
| bindingRequest(binding.key(), INSTANCE), switchingProviderClass); |
| } |
| } |
| } |