| /** |
| * Copyright (C) 2015 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.google.inject.daggeradapter; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.inject.Binder; |
| import com.google.inject.Key; |
| import com.google.inject.internal.UniqueAnnotations; |
| import com.google.inject.multibindings.Multibinder; |
| import com.google.inject.spi.InjectionPoint; |
| import com.google.inject.spi.ModuleAnnotatedMethodScanner; |
| |
| import dagger.Provides; |
| import dagger.Provides.Type; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Method; |
| import java.util.Set; |
| |
| /** |
| * A scanner to process provider methods on Dagger modules. |
| * |
| * @author cgruber@google.com (Christian Gruber) |
| */ |
| final class DaggerMethodScanner extends ModuleAnnotatedMethodScanner { |
| static DaggerMethodScanner INSTANCE = new DaggerMethodScanner(); |
| |
| @Override public Set<? extends Class<? extends Annotation>> annotationClasses() { |
| return ImmutableSet.of(dagger.Provides.class); |
| } |
| |
| @Override public <T> Key<T> prepareMethod( |
| Binder binder, Annotation rawAnnotation, Key<T> key, InjectionPoint injectionPoint) { |
| Method providesMethod = (Method) injectionPoint.getMember(); |
| Provides annotation = (Provides) rawAnnotation; |
| switch (annotation.type()) { |
| case UNIQUE: |
| return key; |
| case MAP: |
| /* TODO(cgruber) implement map bindings */ |
| binder.addError("Map bindings are not yet supported."); |
| case SET: |
| return processSetBinding(binder, key); |
| case SET_VALUES: |
| binder.addError(Type.SET_VALUES.name() + " contributions are not supported by Guice.", |
| providesMethod); |
| return key; |
| default: |
| binder.addError("Unknown @Provides type " + annotation.type() + ".", providesMethod); |
| return key; |
| } |
| } |
| |
| private static <T> Key<T> processSetBinding(Binder binder, Key<T> key) { |
| Multibinder<T> setBinder = Multibinder.newSetBinder(binder, key.getTypeLiteral()); |
| Key<T> newKey = Key.get(key.getTypeLiteral(), UniqueAnnotations.create()); |
| setBinder.addBinding().to(newKey); |
| return newKey; |
| } |
| |
| private DaggerMethodScanner() {} |
| } |