1/** 2 * Copyright (C) 2008 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.ImmutableList; 20import com.google.common.collect.Lists; 21import com.google.inject.ConfigurationException; 22import com.google.inject.Stage; 23import com.google.inject.spi.InjectionPoint; 24import com.google.inject.spi.InjectionRequest; 25import com.google.inject.spi.StaticInjectionRequest; 26 27import java.util.List; 28import java.util.Set; 29 30/** 31 * Handles {@code Binder.requestInjection} and {@code Binder.requestStaticInjection} commands. 32 * 33 * @author crazybob@google.com (Bob Lee) 34 * @author jessewilson@google.com (Jesse Wilson) 35 * @author mikeward@google.com (Mike Ward) 36 */ 37final class InjectionRequestProcessor extends AbstractProcessor { 38 39 private final List<StaticInjection> staticInjections = Lists.newArrayList(); 40 private final Initializer initializer; 41 42 InjectionRequestProcessor(Errors errors, Initializer initializer) { 43 super(errors); 44 this.initializer = initializer; 45 } 46 47 @Override public Boolean visit(StaticInjectionRequest request) { 48 staticInjections.add(new StaticInjection(injector, request)); 49 return true; 50 } 51 52 @Override public Boolean visit(InjectionRequest<?> request) { 53 Set<InjectionPoint> injectionPoints; 54 try { 55 injectionPoints = request.getInjectionPoints(); 56 } catch (ConfigurationException e) { 57 errors.merge(e.getErrorMessages()); 58 injectionPoints = e.getPartialValue(); 59 } 60 61 initializer.requestInjection( 62 injector, request.getInstance(), null, request.getSource(), injectionPoints); 63 return true; 64 } 65 66 void validate() { 67 for (StaticInjection staticInjection : staticInjections) { 68 staticInjection.validate(); 69 } 70 } 71 72 void injectMembers() { 73 /* 74 * TODO: If you request both a parent class and one of its 75 * subclasses, the parent class's static members will be 76 * injected twice. 77 */ 78 for (StaticInjection staticInjection : staticInjections) { 79 staticInjection.injectMembers(); 80 } 81 } 82 83 /** A requested static injection. */ 84 private class StaticInjection { 85 final InjectorImpl injector; 86 final Object source; 87 final StaticInjectionRequest request; 88 ImmutableList<SingleMemberInjector> memberInjectors; 89 90 public StaticInjection(InjectorImpl injector, StaticInjectionRequest request) { 91 this.injector = injector; 92 this.source = request.getSource(); 93 this.request = request; 94 } 95 96 void validate() { 97 Errors errorsForMember = errors.withSource(source); 98 Set<InjectionPoint> injectionPoints; 99 try { 100 injectionPoints = request.getInjectionPoints(); 101 } catch (ConfigurationException e) { 102 errorsForMember.merge(e.getErrorMessages()); 103 injectionPoints = e.getPartialValue(); 104 } 105 if (injectionPoints != null) { 106 memberInjectors = injector.membersInjectorStore.getInjectors( 107 injectionPoints, errorsForMember); 108 } else { 109 memberInjectors = ImmutableList.of(); 110 } 111 112 errors.merge(errorsForMember); 113 } 114 115 void injectMembers() { 116 try { 117 injector.callInContext(new ContextualCallable<Void>() { 118 public Void call(InternalContext context) { 119 for (SingleMemberInjector memberInjector : memberInjectors) { 120 // Run injections if we're not in tool stage (ie, PRODUCTION or DEV), 121 // or if we are in tool stage and the injection point is toolable. 122 if(injector.options.stage != Stage.TOOL || memberInjector.getInjectionPoint().isToolable()) { 123 memberInjector.inject(errors, context, null); 124 } 125 } 126 return null; 127 } 128 }); 129 } catch (ErrorsException e) { 130 throw new AssertionError(); 131 } 132 } 133 } 134} 135