| /** |
| * 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.Key; |
| import com.google.inject.Provider; |
| import java.lang.reflect.Constructor; |
| import java.util.Set; |
| |
| /** |
| * No-op visitor for subclassing. All interface methods simply delegate to |
| * {@link #visitOther()}, returning its result. |
| * |
| * @param <V> any type to be returned by the visit method. Use {@link Void} with |
| * {@code return null} if no return type is needed. |
| * |
| * @author jessewilson@google.com (Jesse Wilson) |
| * @since 2.0 |
| */ |
| public abstract class DefaultBindingTargetVisitor<T, V> implements BindingTargetVisitor<T, V> { |
| |
| protected V visitOther() { |
| return null; |
| } |
| |
| public V visitInstance(T instance, Set<InjectionPoint> injectionPoints) { |
| return visitOther(); |
| } |
| |
| public V visitProvider(Provider<? extends T> provider, Set<InjectionPoint> injectionPoints) { |
| return visitOther(); |
| } |
| |
| public V visitProviderKey(Key<? extends Provider<? extends T>> providerKey) { |
| return visitOther(); |
| } |
| |
| public V visitKey(Key<? extends T> key) { |
| return visitOther(); |
| } |
| |
| public V visitUntargetted() { |
| return visitOther(); |
| } |
| |
| public V visitConstructor(Constructor<? extends T> constructor, |
| Set<InjectionPoint> injectionPoints) { |
| return visitOther(); |
| } |
| |
| public V visitConvertedConstant(T value) { |
| return visitOther(); |
| } |
| |
| public V visitProviderBinding(Key<?> provided) { |
| return visitOther(); |
| } |
| |
| public V visitExposed(PrivateEnvironment privateEnvironment) { |
| return visitOther(); |
| } |
| } |