1 
 2 /*
 3  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
 4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 5  *
 6  * This code is free software; you can redistribute it and/or modify it
 7  * under the terms of the GNU General Public License version 2 only, as
 8  * published by the Free Software Foundation.  Oracle designates this
 9  * particular file as subject to the "Classpath" exception as provided
10  * by Oracle in the LICENSE file that accompanied this code.
11  *
12  * This code is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15  * version 2 for more details (a copy is included in the LICENSE file that
16  * accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License version
19  * 2 along with this work; if not, write to the Free Software Foundation,
20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21  *
22  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
23  * or visit www.oracle.com if you need additional information or have any
24  * questions.
25  */
26 package optkl.util;
27 
28 import java.util.LinkedHashMap;
29 import java.util.Map;
30 
31 public class BiMap<From, To> {
32     public Map<From, To> fromTo = new LinkedHashMap<>();
33     public Map<To, From> toFrom = new LinkedHashMap<>();
34 
35     public void add(From from, To to) {
36         fromTo.put(from, to);
37         toFrom.put(to, from);
38     }
39 
40     public From getFrom(To to) {
41         return toFrom.get(to);
42     }
43 
44     public To getTo(From from) {
45         return fromTo.get(from);
46     }
47 
48     public boolean containsFrom(From from) {
49         return fromTo.containsKey(from);
50     }
51 
52     public boolean containsTo(To to) {
53         return toFrom.containsKey(to);
54     }
55 }