001/*
002 * Copyright (C) 2010 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.annotations;
018
019import java.lang.annotation.Documented;
020import java.lang.annotation.ElementType;
021import java.lang.annotation.Retention;
022import java.lang.annotation.RetentionPolicy;
023import java.lang.annotation.Target;
024
025/**
026 * Signifies that a public API (public class, method or field) is subject to
027 * incompatible changes, or even removal, in a future release. An API bearing
028 * this annotation is exempt from any compatibility guarantees made by its
029 * containing library. Note that the presence of this annotation implies nothing
030 * about the quality or performance of the API in question, only the fact that
031 * it is not "API-frozen."
032 *
033 * <p>It is generally safe for <i>applications</i> to depend on beta APIs, at
034 * the cost of some extra work during upgrades. However it is generally
035 * inadvisable for <i>libraries</i> (which get included on users' CLASSPATHs,
036 * outside the library developers' control) to do so.
037 *
038 *
039 * @author Kevin Bourrillion
040 */
041@Retention(RetentionPolicy.CLASS)
042@Target({
043    ElementType.ANNOTATION_TYPE,
044    ElementType.CONSTRUCTOR,
045    ElementType.FIELD,
046    ElementType.METHOD,
047    ElementType.TYPE})
048@Documented
049@GwtCompatible
050public @interface Beta {}