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;
27 
28 import java.util.Objects;
29 
30 /**
31  * JsonNull implementation class
32  */
33 final class JsonNullImpl implements JsonNull, JsonValueImpl {
34 
35     private final JsonDocumentInfo docInfo;
36     private final int endIndex;
37 
38     static final JsonNullImpl NULL = new JsonNullImpl();
39     static final String VALUE = "null";
40     static final int HASH = Objects.hash(VALUE);
41 
42     JsonNullImpl() {
43         endIndex = 0;
44         docInfo = null;
45     }
46 
47     JsonNullImpl(JsonDocumentInfo doc, int index) {
48         docInfo = doc;
49         endIndex = docInfo.nextIndex(index);
50     }
51 
52     @Override
53     public int getEndIndex() {
54         return endIndex;
55     }
56 
57     @Override
58     public boolean equals(Object o) {
59         return o instanceof JsonNullImpl;
60     }
61 
62     @Override
63     public int hashCode() {
64         return HASH;
65     }
66 
67     @Override
68     public Object toUntyped() {
69         return null;
70     }
71 
72     @Override
73     public String toString() {
74         return VALUE;
75     }
76 }