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.binding; 18 19 import static com.google.common.base.Preconditions.checkArgument; 20 import static dagger.internal.codegen.binding.MapKeys.getMapKey; 21 22 import androidx.room.compiler.processing.XElement; 23 import androidx.room.compiler.processing.XMethodElement; 24 import androidx.room.compiler.processing.XMethodType; 25 import androidx.room.compiler.processing.XTypeElement; 26 import com.google.auto.value.AutoValue; 27 import com.google.auto.value.extension.memoized.Memoized; 28 import com.google.common.collect.Iterables; 29 import dagger.Binds; 30 import dagger.internal.codegen.base.ContributionType; 31 import dagger.internal.codegen.base.ContributionType.HasContributionType; 32 import dagger.internal.codegen.javapoet.TypeNames; 33 import dagger.internal.codegen.model.DaggerAnnotation; 34 import dagger.internal.codegen.model.DependencyRequest; 35 import java.util.Optional; 36 import javax.inject.Inject; 37 38 /** The declaration for a delegate binding established by a {@link Binds} method. */ 39 @AutoValue 40 public abstract class DelegateDeclaration extends Declaration 41 implements HasContributionType { delegateRequest()42 abstract DependencyRequest delegateRequest(); 43 44 // Note: We're using DaggerAnnotation instead of XAnnotation for its equals/hashcode mapKey()45 abstract Optional<DaggerAnnotation> mapKey(); 46 47 @Memoized 48 @Override hashCode()49 public abstract int hashCode(); 50 51 @Override equals(Object obj)52 public abstract boolean equals(Object obj); 53 54 /** A {@link DelegateDeclaration} factory. */ 55 public static final class Factory { 56 private final KeyFactory keyFactory; 57 private final DependencyRequestFactory dependencyRequestFactory; 58 59 @Inject Factory( KeyFactory keyFactory, DependencyRequestFactory dependencyRequestFactory)60 Factory( 61 KeyFactory keyFactory, 62 DependencyRequestFactory dependencyRequestFactory) { 63 this.keyFactory = keyFactory; 64 this.dependencyRequestFactory = dependencyRequestFactory; 65 } 66 create(XMethodElement bindsMethod, XTypeElement contributingModule)67 public DelegateDeclaration create(XMethodElement bindsMethod, XTypeElement contributingModule) { 68 checkArgument(bindsMethod.hasAnnotation(TypeNames.BINDS)); 69 XMethodType resolvedMethod = bindsMethod.asMemberOf(contributingModule.getType()); 70 DependencyRequest delegateRequest = 71 dependencyRequestFactory.forRequiredResolvedVariable( 72 Iterables.getOnlyElement(bindsMethod.getParameters()), 73 Iterables.getOnlyElement(resolvedMethod.getParameterTypes())); 74 return new AutoValue_DelegateDeclaration( 75 ContributionType.fromBindingElement(bindsMethod), 76 keyFactory.forBindsMethod(bindsMethod, contributingModule), 77 Optional.<XElement>of(bindsMethod), 78 Optional.of(contributingModule), 79 delegateRequest, 80 getMapKey(bindsMethod).map(DaggerAnnotation::from)); 81 } 82 } 83 } 84