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.android.processor; 18 19 import static com.google.auto.common.AnnotationMirrors.getAnnotationValue; 20 21 import com.google.auto.common.MoreTypes; 22 import dagger.android.AndroidInjectionKey; 23 import java.util.Optional; 24 import javax.lang.model.element.AnnotationMirror; 25 import javax.lang.model.element.TypeElement; 26 import javax.lang.model.type.TypeMirror; 27 28 final class AndroidMapKeys { 29 /** 30 * If {@code mapKey} is {@link AndroidInjectionKey}, returns the string value for the map key. If 31 * it's {@link dagger.multibindings.ClassKey}, returns the fully-qualified class name of the 32 * annotation value. Otherwise returns {@link Optional#empty()}. 33 */ injectedTypeFromMapKey(AnnotationMirror mapKey)34 static Optional<String> injectedTypeFromMapKey(AnnotationMirror mapKey) { 35 Object mapKeyClass = getAnnotationValue(mapKey, "value").getValue(); 36 if (mapKeyClass instanceof String) { 37 return Optional.of((String) mapKeyClass); 38 } else if (mapKeyClass instanceof TypeMirror) { 39 TypeElement type = MoreTypes.asTypeElement((TypeMirror) mapKeyClass); 40 return Optional.of(type.getQualifiedName().toString()); 41 } else { 42 return Optional.empty(); 43 } 44 } 45 } 46