| /** |
| * Copyright (C) 2008 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.spi; |
| |
| import com.google.inject.Binder; |
| import com.google.inject.ConfigurationException; |
| import com.google.inject.TypeLiteral; |
| import static com.google.inject.internal.util.Preconditions.checkNotNull; |
| import java.util.Set; |
| |
| /** |
| * A request to inject the instance fields and methods of an instance. Requests are created |
| * explicitly in a module using {@link com.google.inject.Binder#requestInjection(Object) |
| * requestInjection()} statements: |
| * <pre> |
| * requestInjection(serviceInstance);</pre> |
| * |
| * @author mikeward@google.com (Mike Ward) |
| * @since 2.0 |
| */ |
| public final class InjectionRequest<T> implements Element { |
| |
| private final Object source; |
| private final TypeLiteral<T> type; |
| private final T instance; |
| |
| public InjectionRequest(Object source, TypeLiteral<T> type, T instance) { |
| this.source = checkNotNull(source, "source"); |
| this.type = checkNotNull(type, "type"); |
| this.instance = checkNotNull(instance, "instance"); |
| } |
| |
| public Object getSource() { |
| return source; |
| } |
| |
| public T getInstance() { |
| return instance; |
| } |
| |
| public TypeLiteral<T> getType() { |
| return type; |
| } |
| |
| /** |
| * Returns the instance methods and fields of {@code instance} that will be injected to fulfill |
| * this request. |
| * |
| * @return a possibly empty set of injection points. The set has a specified iteration order. All |
| * fields are returned and then all methods. Within the fields, supertype fields are returned |
| * before subtype fields. Similarly, supertype methods are returned before subtype methods. |
| * @throws ConfigurationException if there is a malformed injection point on the class of {@code |
| * instance}, such as a field with multiple binding annotations. The exception's {@link |
| * ConfigurationException#getPartialValue() partial value} is a {@code Set<InjectionPoint>} |
| * of the valid injection points. |
| */ |
| public Set<InjectionPoint> getInjectionPoints() throws ConfigurationException { |
| return InjectionPoint.forInstanceMethodsAndFields(instance.getClass()); |
| } |
| |
| public <R> R acceptVisitor(ElementVisitor<R> visitor) { |
| return visitor.visit(this); |
| } |
| |
| public void applyTo(Binder binder) { |
| binder.withSource(getSource()).requestInjection(type, instance); |
| } |
| } |