1 /*
 2  * Copyright (c) 2025, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package hat.tools.json.impl;
27 
28 
29 import hat.tools.json.JsonNull;
30 
31 import java.util.Objects;
32 
33 /**
34  * JsonNull implementation class
35  */
36 public final class JsonNullImpl implements JsonNull {
37 
38     public static final JsonNullImpl NULL = new JsonNullImpl();
39     private static final String VALUE = "null";
40     private static final int HASH = Objects.hash(VALUE);
41 
42     private JsonNullImpl() {}
43 
44     @Override
45     public String toString() {
46         return VALUE;
47     }
48 
49     @Override
50     public boolean equals(Object obj) {
51         return obj instanceof JsonNull;
52     }
53 
54     @Override
55     public int hashCode() {
56         return HASH;
57     }
58 }