content: /*
   * 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
   * <a href="http://code.google.com/webtoolkit/">Google Web Toolkit</a> (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,
   *
   * <pre style="code">
   * {@literal @}GwtCompatible
   * class Lists {
   *   ...
   *   {@literal @}GwtCompatible(serializable = true)
   *   static &lt;E> List&lt;E> newArrayList(E... elements) {
   *     ...
   *   }
   * }
   * </pre>
   * <p>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,
   *
   * <pre style="code">
   * {@literal @}GwtCompatible
   * interface ListFactory {
   *   ...
   *   {@literal @}GwtCompatible(serializable = true)
   *   &lt;E> List&lt;E> newArrayList(E... elements);
   * }
   * </pre>
   * <p>The {@code newArrayList(E[])} method of all implementations of {@code
   * ListFactory} is expected to return a value with a GWT serializable type.
   *
   * <p>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 <a href="http://code.google.com/webtoolkit/doc/latest/DevGuideServerCommunication.html#DevGuideSerializableTypes">
     *     Documentation about GWT serialization</a>
     */
    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 <a href="http://code.google.com/webtoolkit/doc/latest/DevGuideOrganizingProjects.html#DevGuideModules">
     *     Documentation about GWT emulated source</a>
     */
    boolean emulated() default false;
  }
  
  