1 /* 2 * Copyright (C) 2017 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.internal.codegen.writing; 18 19 import static com.google.common.base.Preconditions.checkArgument; 20 21 import com.squareup.javapoet.AnnotationSpec; 22 import dagger.internal.codegen.binding.Binding; 23 import java.util.Optional; 24 import javax.lang.model.element.AnnotationMirror; 25 import javax.lang.model.element.Element; 26 import javax.lang.model.element.Name; 27 28 final class GwtCompatibility { 29 30 /** 31 * Returns a {@code @GwtIncompatible} annotation that is applied to {@code binding}'s {@link 32 * Binding#bindingElement()} or any enclosing type. 33 */ gwtIncompatibleAnnotation(Binding binding)34 static Optional<AnnotationSpec> gwtIncompatibleAnnotation(Binding binding) { 35 checkArgument(binding.bindingElement().isPresent()); 36 Element element = binding.bindingElement().get(); 37 while (element != null) { 38 Optional<AnnotationSpec> gwtIncompatible = 39 element 40 .getAnnotationMirrors() 41 .stream() 42 .filter(annotation -> isGwtIncompatible(annotation)) 43 .map(AnnotationSpec::get) 44 .findFirst(); 45 if (gwtIncompatible.isPresent()) { 46 return gwtIncompatible; 47 } 48 element = element.getEnclosingElement(); 49 } 50 return Optional.empty(); 51 } 52 isGwtIncompatible(AnnotationMirror annotation)53 private static boolean isGwtIncompatible(AnnotationMirror annotation) { 54 Name simpleName = annotation.getAnnotationType().asElement().getSimpleName(); 55 return simpleName.contentEquals("GwtIncompatible"); 56 } 57 } 58