1 /* 2 * Copyright (C) 2016 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; 18 19 import static com.google.common.base.Preconditions.checkArgument; 20 import static dagger.internal.codegen.MapKeys.getMapKey; 21 import static dagger.internal.codegen.MoreAnnotationMirrors.wrapOptionalInEquivalence; 22 23 import com.google.auto.common.MoreElements; 24 import com.google.auto.common.MoreTypes; 25 import com.google.auto.value.AutoValue; 26 import com.google.auto.value.extension.memoized.Memoized; 27 import com.google.common.base.Equivalence; 28 import com.google.common.collect.Iterables; 29 import dagger.Binds; 30 import dagger.internal.codegen.ContributionType.HasContributionType; 31 import dagger.internal.codegen.langmodel.DaggerTypes; 32 import dagger.model.DependencyRequest; 33 import java.util.Optional; 34 import javax.inject.Inject; 35 import javax.lang.model.element.AnnotationMirror; 36 import javax.lang.model.element.Element; 37 import javax.lang.model.element.ExecutableElement; 38 import javax.lang.model.element.TypeElement; 39 import javax.lang.model.type.ExecutableType; 40 41 /** 42 * The declaration for a delegate binding established by a {@link Binds} method. 43 */ 44 @AutoValue 45 abstract class DelegateDeclaration extends BindingDeclaration implements HasContributionType { delegateRequest()46 abstract DependencyRequest delegateRequest(); 47 wrappedMapKey()48 abstract Optional<Equivalence.Wrapper<AnnotationMirror>> wrappedMapKey(); 49 50 @Memoized 51 @Override hashCode()52 public abstract int hashCode(); 53 54 @Override equals(Object obj)55 public abstract boolean equals(Object obj); 56 57 static final class Factory { 58 private final DaggerTypes types; 59 private final KeyFactory keyFactory; 60 private final DependencyRequestFactory dependencyRequestFactory; 61 62 @Inject Factory( DaggerTypes types, KeyFactory keyFactory, DependencyRequestFactory dependencyRequestFactory)63 Factory( 64 DaggerTypes types, 65 KeyFactory keyFactory, 66 DependencyRequestFactory dependencyRequestFactory) { 67 this.types = types; 68 this.keyFactory = keyFactory; 69 this.dependencyRequestFactory = dependencyRequestFactory; 70 } 71 create( ExecutableElement bindsMethod, TypeElement contributingModule)72 DelegateDeclaration create( 73 ExecutableElement bindsMethod, TypeElement contributingModule) { 74 checkArgument(MoreElements.isAnnotationPresent(bindsMethod, Binds.class)); 75 ExecutableType resolvedMethod = 76 MoreTypes.asExecutable( 77 types.asMemberOf(MoreTypes.asDeclared(contributingModule.asType()), bindsMethod)); 78 DependencyRequest delegateRequest = 79 dependencyRequestFactory.forRequiredResolvedVariable( 80 Iterables.getOnlyElement(bindsMethod.getParameters()), 81 Iterables.getOnlyElement(resolvedMethod.getParameterTypes())); 82 return new AutoValue_DelegateDeclaration( 83 ContributionType.fromBindingElement(bindsMethod), 84 keyFactory.forBindsMethod(bindsMethod, contributingModule), 85 Optional.<Element>of(bindsMethod), 86 Optional.of(contributingModule), 87 delegateRequest, 88 wrapOptionalInEquivalence(getMapKey(bindsMethod))); 89 } 90 } 91 } 92