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 21 import androidx.room.compiler.processing.XMethodElement; 22 import androidx.room.compiler.processing.XTypeElement; 23 import com.google.auto.value.AutoValue; 24 import com.google.auto.value.extension.memoized.Memoized; 25 import dagger.BindsOptionalOf; 26 import dagger.internal.codegen.javapoet.TypeNames; 27 import dagger.spi.model.Key; 28 import java.util.Optional; 29 import javax.inject.Inject; 30 31 /** A {@link BindsOptionalOf} declaration. */ 32 @AutoValue 33 abstract class OptionalBindingDeclaration extends BindingDeclaration { 34 35 /** 36 * {@inheritDoc} 37 * 38 * <p>The key's type is the method's return type, even though the synthetic bindings will be for 39 * {@code Optional} of derived types. 40 */ 41 @Override key()42 public abstract Key key(); 43 44 @Memoized 45 @Override hashCode()46 public abstract int hashCode(); 47 48 @Override equals(Object obj)49 public abstract boolean equals(Object obj); 50 51 static class Factory { 52 private final KeyFactory keyFactory; 53 54 @Inject Factory(KeyFactory keyFactory)55 Factory(KeyFactory keyFactory) { 56 this.keyFactory = keyFactory; 57 } 58 forMethod(XMethodElement method, XTypeElement contributingModule)59 OptionalBindingDeclaration forMethod(XMethodElement method, XTypeElement contributingModule) { 60 checkArgument(method.hasAnnotation(TypeNames.BINDS_OPTIONAL_OF)); 61 return new AutoValue_OptionalBindingDeclaration( 62 Optional.of(method), 63 Optional.of(contributingModule), 64 keyFactory.forBindsOptionalOfMethod(method, contributingModule)); 65 } 66 } 67 } 68