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.util;
21
22 import javax.inject.Provider;
23
24 /**
25 * A provider that can report at runtime the type it will provide. This is mostly to allow instance
26 * and wrapper providers to pass through type information.
27 *
28 * @since 0.6
29 * @author <a href="http://grouplens.org">GroupLens Research</a>
30 */
31 public interface TypedProvider<T> extends Provider<T> {
32 /**
33 * Get the type of object that will be provided by this provider. Any object returned from
34 * {@link #get()} must be of this type. This is used to help the injector refine its types.
35 *
36 * @return The type of objects that will be provided.
37 */
38 Class<?> getProvidedType();
39 }