org.apache.rocketmq.shaded.com.google.common.net.ParametricNullness Maven / Gradle / Ivy
/*
* Copyright (C) 2021 The Guava Authors
*
* 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 org.apache.rocketmq.shaded.com.google.common.net;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import org.apache.rocketmq.shaded.com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
/**
* Marks a "top-level" type-variable usage as the closest we can get to "non-nullable when
* non-nullable; nullable when nullable" (like the Android {@code
* NullFromTypeParam}).
*
* Consumers of this annotation include:
*
*
* - Kotlin, for which it makes the type-variable usage (a) a Kotlin platform type when the type
* argument is non-nullable and (b) nullable when the type argument is nullable. We use this
* to "undo" {@link ElementTypesAreNonnullByDefault}.
*
- J2ObjC
*
- {@code NullPointerTester}, at least in the Android backport (where the type-use annotations
* {@code NullPointerTester} would need are not available) and in case of JDK-8202469
*
*
*/
@GwtCompatible
@Retention(RUNTIME)
@Target({FIELD, METHOD, PARAMETER})
@javax.annotation.meta.TypeQualifierNickname
@javax.annotation.Nonnull(when = javax.annotation.meta.When.UNKNOWN)
@interface ParametricNullness {}