| /** |
| * 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.Binding; |
| |
| /** |
| * No-op visitor for subclassing. All interface methods simply delegate to |
| * {@link #visitOther(Element)}, 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 sberlin@gmail.com (Sam Berlin) |
| * @since 2.0 |
| */ |
| public abstract class DefaultElementVisitor<V> implements ElementVisitor<V> { |
| |
| /** |
| * Default visit implementation. Returns {@code null}. |
| */ |
| protected V visitOther(Element element) { |
| return null; |
| } |
| |
| public V visit(Message message) { |
| return visitOther(message); |
| } |
| |
| public <T> V visit(Binding<T> binding) { |
| return visitOther(binding); |
| } |
| |
| /*if[AOP]*/ |
| public V visit(InterceptorBinding interceptorBinding) { |
| return visitOther(interceptorBinding); |
| } |
| /*end[AOP]*/ |
| |
| public V visit(ScopeBinding scopeBinding) { |
| return visitOther(scopeBinding); |
| } |
| |
| public V visit(TypeConverterBinding typeConverterBinding) { |
| return visitOther(typeConverterBinding); |
| } |
| |
| public <T> V visit(ProviderLookup<T> providerLookup) { |
| return visitOther(providerLookup); |
| } |
| |
| public V visit(InjectionRequest<?> injectionRequest) { |
| return visitOther(injectionRequest); |
| } |
| |
| public V visit(StaticInjectionRequest staticInjectionRequest) { |
| return visitOther(staticInjectionRequest); |
| } |
| |
| public V visit(PrivateElements privateElements) { |
| return visitOther(privateElements); |
| } |
| |
| public <T> V visit(MembersInjectorLookup<T> lookup) { |
| return visitOther(lookup); |
| } |
| |
| public V visit(TypeListenerBinding binding) { |
| return visitOther(binding); |
| } |
| |
| public V visit(ProvisionListenerBinding binding) { |
| return visitOther(binding); |
| } |
| |
| public V visit(DisableCircularProxiesOption option) { |
| return visitOther(option); |
| } |
| |
| public V visit(RequireExplicitBindingsOption option) { |
| return visitOther(option); |
| } |
| |
| public V visit(RequireAtInjectOnConstructorsOption option) { |
| return visitOther(option); |
| } |
| |
| public V visit(RequireExactBindingAnnotationsOption option) { |
| return visitOther(option); |
| } |
| |
| public V visit(ModuleAnnotatedMethodScannerBinding binding) { |
| return visitOther(binding); |
| } |
| } |