1/** 2 * Copyright (C) 2009 Google Inc. 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 17package com.google.inject.internal; 18 19import com.google.common.collect.Lists; 20import com.google.inject.Key; 21import com.google.inject.MembersInjector; 22import com.google.inject.Provider; 23import com.google.inject.TypeLiteral; 24import com.google.inject.spi.Element; 25import com.google.inject.spi.MembersInjectorLookup; 26import com.google.inject.spi.ProviderLookup; 27 28import java.util.List; 29 30/** 31 * Returns providers and members injectors that haven't yet been initialized. As a part of injector 32 * creation it's necessary to {@link #initialize initialize} these lookups. 33 * 34 * @author jessewilson@google.com (Jesse Wilson) 35 */ 36final class DeferredLookups implements Lookups { 37 private final InjectorImpl injector; 38 private final List<Element> lookups = Lists.newArrayList(); 39 40 DeferredLookups(InjectorImpl injector) { 41 this.injector = injector; 42 } 43 44 /** 45 * Initialize the specified lookups, either immediately or when the injector is created. 46 */ 47 void initialize(Errors errors) { 48 injector.lookups = injector; 49 new LookupProcessor(errors).process(injector, lookups); 50 } 51 52 public <T> Provider<T> getProvider(Key<T> key) { 53 ProviderLookup<T> lookup = new ProviderLookup<T>(key, key); 54 lookups.add(lookup); 55 return lookup.getProvider(); 56 } 57 58 public <T> MembersInjector<T> getMembersInjector(TypeLiteral<T> type) { 59 MembersInjectorLookup<T> lookup = new MembersInjectorLookup<T>(type, type); 60 lookups.add(lookup); 61 return lookup.getMembersInjector(); 62 } 63} 64