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 oracle.code.json.impl;
27 
28 import oracle.code.json.JsonNull;
29 
30 import java.util.Objects;
31 
32 /**
33  * JsonNull implementation class
34  */
35 public final class JsonNullImpl implements JsonNull {
36 
37     public static final JsonNullImpl NULL = new JsonNullImpl();
38     private static final String VALUE = "null";
39     private static final int HASH = Objects.hash(VALUE);
40 
41     private JsonNullImpl() {}
42 
43     @Override
44     public String toString() {
45         return VALUE;
46     }
47 
48     @Override
49     public boolean equals(Object obj) {
50         return obj instanceof JsonNull;
51     }
52 
53     @Override
54     public int hashCode() {
55         return HASH;
56     }
57 }