1 /* Copyright (c) 2008 Sascha Kohlmann
2 *
3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU Affero General Public License as published by
5 * the Free Software Foundation, either version 3 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU Affero General Public License for more details.
12 *
13 * You should have received a copy of the GNU Affero General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16 package net.sf.eos;
17
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 * The presence of this annotation on a method parameter indicates that
26 * {@code null} is an acceptable value for that parameter. Cause of undefined
27 * semantic it must not be used for parameters of primitive types.
28 *
29 * <p><strong>Note:</strong> experimental - inspired by <em>guice</em></p>
30 *
31 * @author Sascha Kohlmann
32 * @since 0.1.0
33 */
34 @Experimental
35 @Documented
36 @Retention(RetentionPolicy.RUNTIME)
37 @Target(ElementType.PARAMETER)
38 public @interface Nullable { }