https://github.com/google/guice/guice: Guice is a lightweight dependency injection framework for Java 6 and above (Google, Inc.) 
/*
 * 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.Scope;
import java.lang.annotation.Annotation;


Visits each of the strategies used to scope an injection.

Type parameters:
  • <V> – any type to be returned by the visit method. Use Void with return null if no return type is needed.
Since:2.0
/**
 * Visits each of the strategies used to scope 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 BindingScopingVisitor<V> {

  
Visit an eager singleton or single instance. This scope strategy is found on both module and
injector bindings.

/**
   * Visit an eager singleton or single instance. This scope strategy is found on both module and
   * injector bindings.
   */
  V visitEagerSingleton();

  
Visit a scope instance. This scope strategy is found on both module and injector bindings. 
/** Visit a scope instance. This scope strategy is found on both module and injector bindings. */
  V visitScope(Scope scope);

  
Visit a scope annotation. This scope strategy is found only on module bindings. The instance that implements this scope is registered by Binder.bindScope(). 
/**
   * Visit a scope annotation. This scope strategy is found only on module bindings. The instance
   * that implements this scope is registered by {@link com.google.inject.Binder#bindScope(Class,
   * Scope) Binder.bindScope()}.
   */
  V visitScopeAnnotation(Class<? extends Annotation> scopeAnnotation);

  
Visit an unspecified or unscoped strategy. On a module, this strategy indicates that the
injector should use scoping annotations to find a scope. On an injector, it indicates that no
scope is applied to the binding. An unscoped binding will behave like a scoped one when it is
linked to a scoped binding.

/**
   * Visit an unspecified or unscoped strategy. On a module, this strategy indicates that the
   * injector should use scoping annotations to find a scope. On an injector, it indicates that no
   * scope is applied to the binding. An unscoped binding will behave like a scoped one when it is
   * linked to a scoped binding.
   */
  V visitNoScoping();
}