/*
*
* * Copyright 2015. Appsi Mobile
* *
* * 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 net.jcip.annotations;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* The class to which this annotation is applied is immutable. This means that
* its state cannot be seen to change by callers, which implies that
* <ul>
* <li> all public fields are final, </li>
* <li> all public final reference fields refer to other immutable objects, and </li>
* <li> constructors and methods do not publish references to any internal state
* which is potentially mutable by the implementation. </li>
* </ul>
* Immutable objects may still have internal mutable state for purposes of performance
* optimization; some state variables may be lazily computed, so long as they are computed
* from immutable state and that callers cannot tell the difference.
* <p/>
* Immutable objects are inherently thread-safe; they may be passed between threads or
* published without synchronization.
*/
@Documented
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface Immutable {
}