| /* |
| * Copyright (C) 2015 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.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.collect.Iterables.getOnlyElement; |
| import static dagger.internal.codegen.binding.SourceFiles.membersInjectorNameForType; |
| import static dagger.internal.codegen.javapoet.TypeNames.INSTANCE_FACTORY; |
| import static dagger.internal.codegen.javapoet.TypeNames.MEMBERS_INJECTORS; |
| |
| import com.google.auto.common.MoreTypes; |
| import com.squareup.javapoet.CodeBlock; |
| import dagger.internal.codegen.binding.ProvisionBinding; |
| import dagger.internal.codegen.writing.FrameworkFieldInitializer.FrameworkInstanceCreationExpression; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.TypeMirror; |
| |
| /** A {@code Provider<MembersInjector<Foo>>} creation expression. */ |
| final class MembersInjectorProviderCreationExpression |
| implements FrameworkInstanceCreationExpression { |
| |
| private final ComponentBindingExpressions componentBindingExpressions; |
| private final ProvisionBinding binding; |
| |
| MembersInjectorProviderCreationExpression( |
| ProvisionBinding binding, ComponentBindingExpressions componentBindingExpressions) { |
| this.binding = checkNotNull(binding); |
| this.componentBindingExpressions = checkNotNull(componentBindingExpressions); |
| } |
| |
| @Override |
| public CodeBlock creationExpression() { |
| TypeMirror membersInjectedType = |
| getOnlyElement(MoreTypes.asDeclared(binding.key().type()).getTypeArguments()); |
| |
| boolean castThroughRawType = false; |
| CodeBlock membersInjector; |
| if (binding.injectionSites().isEmpty()) { |
| membersInjector = CodeBlock.of("$T.<$T>noOp()", MEMBERS_INJECTORS, membersInjectedType); |
| } else { |
| TypeElement injectedTypeElement = MoreTypes.asTypeElement(membersInjectedType); |
| while (!hasLocalInjectionSites(injectedTypeElement)) { |
| // Cast through a raw type since we're going to be using the MembersInjector for the |
| // parent type. |
| castThroughRawType = true; |
| injectedTypeElement = MoreTypes.asTypeElement(injectedTypeElement.getSuperclass()); |
| } |
| |
| membersInjector = CodeBlock.of( |
| "$T.create($L)", |
| membersInjectorNameForType(injectedTypeElement), |
| componentBindingExpressions.getCreateMethodArgumentsCodeBlock(binding)); |
| } |
| |
| // TODO(ronshapiro): consider adding a MembersInjectorBindingExpression to return this directly |
| // (as it's rarely requested as a Provider). |
| CodeBlock providerExpression = CodeBlock.of("$T.create($L)", INSTANCE_FACTORY, membersInjector); |
| // If needed we cast through raw type around the InstanceFactory type as opposed to the |
| // MembersInjector since we end up with an InstanceFactory<MembersInjector> as opposed to a |
| // InstanceFactory<MembersInjector<Foo>> and that becomes unassignable. To fix it would require |
| // a second cast. If we just cast to the raw type InstanceFactory though, that becomes |
| // assignable. |
| return castThroughRawType |
| ? CodeBlock.of("($T) $L", INSTANCE_FACTORY, providerExpression) : providerExpression; |
| } |
| |
| private boolean hasLocalInjectionSites(TypeElement injectedTypeElement) { |
| return binding.injectionSites() |
| .stream() |
| .anyMatch( |
| injectionSite -> |
| injectionSite.element().getEnclosingElement().equals(injectedTypeElement)); |
| } |
| |
| @Override |
| public boolean useInnerSwitchingProvider() { |
| return !binding.injectionSites().isEmpty(); |
| } |
| } |