com.google.common.annotations.GwtCompatible Maven / Gradle / Ivy
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/*
* Copyright (C) 2009 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 com.google.common.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 presence of this annotation on a type indicates that the type may be used with the Google Web Toolkit (GWT). When applied to a method,
* the return type of the method is GWT compatible. It's useful to indicate that an instance created
* by factory methods has a GWT serializable type. In the following example,
*
*
* {@literal @}GwtCompatible
* class Lists {
* ...
* {@literal @}GwtCompatible(serializable = true)
* {@literal static List} newArrayList(E... elements) {
* ...
* }
* }
*
*
* The return value of {@code Lists.newArrayList(E[])} has GWT serializable type. It is also
* useful in specifying contracts of interface methods. In the following example,
*
*
* {@literal @}GwtCompatible
* interface ListFactory {
* ...
* {@literal @}GwtCompatible(serializable = true)
* {@literal List} newArrayList(E... elements);
* }
*
*
* The {@code newArrayList(E[])} method of all implementations of {@code ListFactory} is expected
* to return a value with a GWT serializable type.
*
*
Note that a {@code GwtCompatible} type may have some {@link GwtIncompatible} methods.
*
* @author Charles Fry
* @author Hayward Chan
*/
@Retention(RetentionPolicy.CLASS)
@Target({ElementType.TYPE, ElementType.METHOD})
@Documented
@GwtCompatible
public @interface GwtCompatible {
/**
* When {@code true}, the annotated type or the type of the method return value is GWT
* serializable.
*
* @see
* Documentation about GWT serialization
*/
boolean serializable() default false;
/**
* When {@code true}, the annotated type is emulated in GWT. The emulated source (also known as
* super-source) is different from the implementation used by the JVM.
*
* @see
* Documentation about GWT emulated source
*/
boolean emulated() default false;
}