1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/annotation/Immutable.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,58 @@
1.4 +/*
1.5 + * ====================================================================
1.6 + *
1.7 + * Licensed to the Apache Software Foundation (ASF) under one or more
1.8 + * contributor license agreements. See the NOTICE file distributed with
1.9 + * this work for additional information regarding copyright ownership.
1.10 + * The ASF licenses this file to You under the Apache License, Version 2.0
1.11 + * (the "License"); you may not use this file except in compliance with
1.12 + * the License. You may obtain a copy of the License at
1.13 + *
1.14 + * http://www.apache.org/licenses/LICENSE-2.0
1.15 + *
1.16 + * Unless required by applicable law or agreed to in writing, software
1.17 + * distributed under the License is distributed on an "AS IS" BASIS,
1.18 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.19 + * See the License for the specific language governing permissions and
1.20 + * limitations under the License.
1.21 + * ====================================================================
1.22 + *
1.23 + * This software consists of voluntary contributions made by many
1.24 + * individuals on behalf of the Apache Software Foundation. For more
1.25 + * information on the Apache Software Foundation, please see
1.26 + * <http://www.apache.org/>.
1.27 + *
1.28 + */
1.29 +package ch.boye.httpclientandroidlib.annotation;
1.30 +
1.31 +import java.lang.annotation.Documented;
1.32 +import java.lang.annotation.ElementType;
1.33 +import java.lang.annotation.Retention;
1.34 +import java.lang.annotation.RetentionPolicy;
1.35 +import java.lang.annotation.Target;
1.36 +
1.37 +/**
1.38 + * The class to which this annotation is applied is immutable. This means that
1.39 + * its state cannot be seen to change by callers, which implies that
1.40 + * <ul>
1.41 + * <li> all public fields are final, </li>
1.42 + * <li> all public final reference fields refer to other immutable objects, and </li>
1.43 + * <li> constructors and methods do not publish references to any internal state
1.44 + * which is potentially mutable by the implementation. </li>
1.45 + * </ul>
1.46 + * Immutable objects may still have internal mutable state for purposes of performance
1.47 + * optimization; some state variables may be lazily computed, so long as they are computed
1.48 + * from immutable state and that callers cannot tell the difference.
1.49 + * <p>
1.50 + * Immutable objects are inherently thread-safe; they may be passed between threads or
1.51 + * published without synchronization.
1.52 + * <p>
1.53 + * Based on code developed by Brian Goetz and Tim Peierls and concepts
1.54 + * published in 'Java Concurrency in Practice' by Brian Goetz, Tim Peierls,
1.55 + * Joshua Bloch, Joseph Bowbeer, David Holmes and Doug Lea.
1.56 + */
1.57 +@Documented
1.58 +@Target(ElementType.TYPE)
1.59 +@Retention(RetentionPolicy.CLASS) // The original version used RUNTIME
1.60 +public @interface Immutable {
1.61 +}
