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.solver;
21
22 import java.util.EnumSet;
23
24 /**
25 * Flags controlling binding behavior.
26 */
27 public enum BindingFlag {
28 /**
29 * The binding is fixed (its result cannot be rewritten in graph rewriting).
30 */
31 FIXED,
32 /**
33 * The binding's resulting desire should have subsequent resolution deferred.
34 */
35 DEFERRED,
36 /**
37 * The binding is terminal (no further rules should be applied).
38 */
39 TERMINAL,
40 /**
41 * The binding should be skipped if one of its results' dependencies cannot be satisfied.
42 */
43 SKIPPABLE;
44
45 public static EnumSet<BindingFlag> emptySet() {
46 return EnumSet.noneOf(BindingFlag.class);
47 }
48
49 public static EnumSet<BindingFlag> set(BindingFlag... flags) {
50 EnumSet<BindingFlag> set = emptySet();
51 for (BindingFlag flag: flags) {
52 set.add(flag);
53 }
54 return set;
55 }
56 }