1 /*
2 * Copyright (C) 2009 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14
15 package com.google.common.util.concurrent;
16
17 import com.google.common.annotations.GwtCompatible;
18 import java.lang.annotation.Documented;
19 import java.lang.annotation.ElementType;
20 import java.lang.annotation.Retention;
21 import java.lang.annotation.RetentionPolicy;
22 import java.lang.annotation.Target;
23
24 /**
25 * Outer class that exists solely to let us write {@code Partially.GwtIncompatible} instead of plain
26 * {@code GwtIncompatible}. This is more accurate for {@link Futures#catching}, which is available
27 * under GWT but with a slightly different signature.
28 *
29 * <p>We can't use {@code PartiallyGwtIncompatible} because then the GWT compiler wouldn't recognize
30 * it as a {@code GwtIncompatible} annotation. And for {@code Futures.catching}, we need the GWT
31 * compiler to autostrip the normal server method in order to expose the special, inherited GWT
32 * version.
33 */
34 @GwtCompatible
35 @ElementTypesAreNonnullByDefault
36 final class Partially {
37 /**
38 * The presence of this annotation on an API indicates that the method <i>may</i> be used with the
39 * <a href="http://www.gwtproject.org/">Google Web Toolkit</a> (GWT) but that it has <i>some
40 * restrictions</i>.
41 */
42 @Retention(RetentionPolicy.CLASS)
43 @Target({ElementType.TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.FIELD})
44 @Documented
45 @interface GwtIncompatible {
46 String value();
47 }
48
49 private Partially() {}
50 }