1 /*
2 * Grapht, an open source dependency injector.
3 * Copyright 2014-2015 various contributors (see CONTRIBUTORS.txt)
4 * Copyright 2010-2014 Regents of the University of Minnesota
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU Lesser General Public License as
8 * published by the Free Software Foundation; either version 2.1 of the
9 * License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
14 * details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc., 51
18 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20 package org.grouplens.grapht.annotation;
21
22 import org.grouplens.grapht.CachePolicy;
23
24 import javax.inject.Qualifier;
25 import java.lang.annotation.*;
26
27 /**
28 * A default implementation for a {@link Qualifier}.
29 */
30 @Retention(RetentionPolicy.RUNTIME)
31 @Target({ ElementType.TYPE, ElementType.ANNOTATION_TYPE })
32 @Documented
33 public @interface DefaultImplementation {
34 /**
35 * The implementation class.
36 * @return The implementation class.
37 */
38 Class<?> value();
39
40 /**
41 * The default cache policy of this default.
42 * @return The default cache policy for this binding.
43 */
44 CachePolicy cachePolicy() default CachePolicy.NO_PREFERENCE;
45
46 /**
47 * Whether the default binding should be skipped if its dependencies cannot be satisfied.
48 * @return {@code true} if this default should be skipped if its dependencies cannot be satisfied.
49 */
50 boolean skipIfUnusable() default false;
51 }