| /** |
| * 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; |
| |
| /** |
| * Visits each of the strategies used to find an instance to satisfy an injection. |
| * |
| * @param <V> any type to be returned by the visit method. Use {@link Void} with |
| * {@code return null} if no return type is needed. |
| * @since 2.0 |
| */ |
| public interface BindingTargetVisitor<T, V> { |
| |
| /** |
| * Visit a instance binding. The same instance is returned for every injection. This target is |
| * found in both module and injector bindings. |
| */ |
| V visit(InstanceBinding<? extends T> binding); |
| |
| /** |
| * Visit a provider instance binding. The provider's {@code get} method is invoked to resolve |
| * injections. This target is found in both module and injector bindings. |
| */ |
| V visit(ProviderInstanceBinding<? extends T> binding); |
| |
| /** |
| * Visit a provider key binding. To resolve injections, the provider key is first resolved, then |
| * that provider's {@code get} method is invoked. This target is found in both module and injector |
| * bindings. |
| */ |
| V visit(ProviderKeyBinding<? extends T> binding); |
| |
| /** |
| * Visit a linked key binding. The other key's binding is used to resolve injections. This |
| * target is found in both module and injector bindings. |
| */ |
| V visit(LinkedKeyBinding<? extends T> binding); |
| |
| /** |
| * Visit a binding to a key exposed from an enclosed private environment. This target is only |
| * found in injector bindings. |
| */ |
| V visit(ExposedBinding<? extends T> binding); |
| |
| /** |
| * Visit an untargetted binding. This target is found only on module bindings. It indicates |
| * that the injector should use its implicit binding strategies to resolve injections. |
| */ |
| V visit(UntargettedBinding<? extends T> binding); |
| |
| /** |
| * Visit a constructor binding. To resolve injections, an instance is instantiated by invoking |
| * {@code constructor}. This target is found only on injector bindings. |
| */ |
| V visit(ConstructorBinding<? extends T> binding); |
| |
| /** |
| * Visit a binding created from converting a bound instance to a new type. The source binding |
| * has the same binding annotation but a different type. This target is found only on injector |
| * bindings. |
| */ |
| V visit(ConvertedConstantBinding<? extends T> binding); |
| |
| /** |
| * Visit a binding to a {@link com.google.inject.Provider} that delegates to the binding for the |
| * provided type. This target is found only on injector bindings. |
| */ |
| V visit(ProviderBinding<? extends T> binding); |
| } |