| /* |
| * 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.google.common.base.Preconditions.checkNotNull; |
| import static dagger.internal.codegen.langmodel.Accessibility.accessibleTypeName; |
| import static dagger.internal.codegen.xprocessing.XProcessingEnvs.isPreJava8SourceVersion; |
| import static dagger.internal.codegen.xprocessing.XProcessingEnvs.wrapType; |
| |
| import androidx.room.compiler.processing.XProcessingEnv; |
| import androidx.room.compiler.processing.XType; |
| import com.google.common.util.concurrent.Futures; |
| import com.squareup.javapoet.ClassName; |
| import com.squareup.javapoet.CodeBlock; |
| import dagger.assisted.Assisted; |
| import dagger.assisted.AssistedFactory; |
| import dagger.assisted.AssistedInject; |
| import dagger.internal.codegen.javapoet.Expression; |
| import dagger.internal.codegen.javapoet.TypeNames; |
| |
| final class ImmediateFutureRequestRepresentation extends RequestRepresentation { |
| private final RequestRepresentation instanceRequestRepresentation; |
| private final XType type; |
| private final XProcessingEnv processingEnv; |
| |
| @AssistedInject |
| ImmediateFutureRequestRepresentation( |
| @Assisted RequestRepresentation instanceRequestRepresentation, |
| @Assisted XType type, |
| XProcessingEnv processingEnv) { |
| this.instanceRequestRepresentation = checkNotNull(instanceRequestRepresentation); |
| this.type = checkNotNull(type); |
| this.processingEnv = processingEnv; |
| } |
| |
| @Override |
| Expression getDependencyExpression(ClassName requestingClass) { |
| return Expression.create( |
| wrapType(TypeNames.LISTENABLE_FUTURE, type, processingEnv), |
| CodeBlock.of("$T.immediateFuture($L)", Futures.class, instanceExpression(requestingClass))); |
| } |
| |
| private CodeBlock instanceExpression(ClassName requestingClass) { |
| Expression expression = instanceRequestRepresentation.getDependencyExpression(requestingClass); |
| if (isPreJava8SourceVersion(processingEnv)) { |
| // Java 7 type inference is not as strong as in Java 8, and therefore some generated code must |
| // cast. |
| // |
| // For example, javac7 cannot detect that Futures.immediateFuture(ImmutableSet.of("T")) |
| // can safely be assigned to ListenableFuture<Set<T>>. |
| if (!expression.type().isSameType(type)) { |
| return CodeBlock.of( |
| "($T) $L", |
| accessibleTypeName(type, requestingClass, processingEnv), |
| expression.codeBlock()); |
| } |
| } |
| return expression.codeBlock(); |
| } |
| |
| @AssistedFactory |
| static interface Factory { |
| ImmediateFutureRequestRepresentation create( |
| RequestRepresentation instanceRequestRepresentation, XType type); |
| } |
| } |