https://github.com/google/guice/guice: Guice is a lightweight dependency injection framework for Java 6 and above (Google, Inc.) 
/*
 * Copyright (C) 2006 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;

import static java.lang.annotation.ElementType.ANNOTATION_TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;


Annotates annotations which are used for scoping. Only one such annotation may apply to a single implementation class. You must also annotate scope annotations with @Retention(RUNTIME). For example: 
 @Retention(RUNTIME) @Target(TYPE, METHOD) @ScopeAnnotation public @interface SessionScoped {} 


Author:crazybob@google.com (Bob Lee)
/**
 * Annotates annotations which are used for scoping. Only one such annotation may apply to a single
 * implementation class. You must also annotate scope annotations with {@code @Retention(RUNTIME)}.
 * For example:
 *
 * <pre>
 *   {@code @}Retention(RUNTIME)
 *   {@code @}Target(TYPE, METHOD)
 *   {@code @}ScopeAnnotation
 *   public {@code @}interface SessionScoped {}
 * </pre>
 *
 * @author crazybob@google.com (Bob Lee)
 */
@Target(ANNOTATION_TYPE)
@Retention(RUNTIME)
public @interface ScopeAnnotation {}