1 /* 2 * Copyright (C) 2021 The Dagger Authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package dagger.hilt.processor.internal.definecomponent; 18 19 import static dagger.internal.codegen.extension.DaggerStreams.toImmutableSet; 20 21 import com.google.auto.value.AutoValue; 22 import com.google.common.collect.ImmutableMap; 23 import com.google.common.collect.ImmutableSet; 24 import dagger.hilt.processor.internal.AggregatedElements; 25 import dagger.hilt.processor.internal.AnnotationValues; 26 import dagger.hilt.processor.internal.ClassNames; 27 import dagger.hilt.processor.internal.ProcessorErrors; 28 import dagger.hilt.processor.internal.Processors; 29 import javax.lang.model.element.AnnotationMirror; 30 import javax.lang.model.element.AnnotationValue; 31 import javax.lang.model.element.TypeElement; 32 import javax.lang.model.util.Elements; 33 34 /** 35 * A class that represents the values stored in an {@link 36 * dagger.hilt.internal.definecomponent.DefineComponentClasses} annotation. 37 */ 38 @AutoValue 39 abstract class DefineComponentClassesMetadata { 40 41 /** 42 * Returns the element annotated with {@code dagger.hilt.internal.definecomponent.DefineComponent} 43 * or {@code dagger.hilt.internal.definecomponent.DefineComponent.Builder}. 44 */ element()45 abstract TypeElement element(); 46 47 /** Returns {@code true} if this element represents a component. */ isComponent()48 abstract boolean isComponent(); 49 50 /** Returns {@code true} if this element represents a component builder. */ isComponentBuilder()51 boolean isComponentBuilder() { 52 return !isComponent(); 53 } 54 from(Elements elements)55 static ImmutableSet<DefineComponentClassesMetadata> from(Elements elements) { 56 return AggregatedElements.from( 57 ClassNames.DEFINE_COMPONENT_CLASSES_PACKAGE, 58 ClassNames.DEFINE_COMPONENT_CLASSES, 59 elements) 60 .stream() 61 .map(aggregatedElement -> create(aggregatedElement, elements)) 62 .collect(toImmutableSet()); 63 } 64 create(TypeElement element, Elements elements)65 private static DefineComponentClassesMetadata create(TypeElement element, Elements elements) { 66 AnnotationMirror annotationMirror = 67 Processors.getAnnotationMirror(element, ClassNames.DEFINE_COMPONENT_CLASSES); 68 69 ImmutableMap<String, AnnotationValue> values = 70 Processors.getAnnotationValues(elements, annotationMirror); 71 72 String componentName = AnnotationValues.getString(values.get("component")); 73 String builderName = AnnotationValues.getString(values.get("builder")); 74 75 ProcessorErrors.checkState( 76 !(componentName.isEmpty() && builderName.isEmpty()), 77 element, 78 "@DefineComponentClasses missing both `component` and `builder` members."); 79 80 ProcessorErrors.checkState( 81 componentName.isEmpty() || builderName.isEmpty(), 82 element, 83 "@DefineComponentClasses should not include both `component` and `builder` members."); 84 85 boolean isComponent = !componentName.isEmpty(); 86 String componentOrBuilderName = isComponent ? componentName : builderName; 87 TypeElement componentOrBuilderElement = elements.getTypeElement(componentOrBuilderName); 88 ProcessorErrors.checkState( 89 componentOrBuilderElement != null, 90 componentOrBuilderElement, 91 "%s.%s(), has invalid value: `%s`.", 92 ClassNames.DEFINE_COMPONENT_CLASSES.simpleName(), 93 isComponent ? "component" : "builder", 94 componentOrBuilderName); 95 return new AutoValue_DefineComponentClassesMetadata(componentOrBuilderElement, isComponent); 96 } 97 } 98