1
2
3
4
5
6
7 package org.mule.transport;
8
9 import java.io.ObjectStreamException;
10 import java.io.Serializable;
11
12
13
14
15
16 public final class NullPayload implements Serializable
17 {
18
19
20
21 private static final long serialVersionUID = 3530905899811505080L;
22
23 private static class NullPayloadHolder
24 {
25 private static final NullPayload instance = new NullPayload();
26 }
27
28 public static NullPayload getInstance()
29 {
30 return NullPayloadHolder.instance;
31 }
32
33 private NullPayload()
34 {
35 super();
36 }
37
38 private Object readResolve() throws ObjectStreamException
39 {
40 return NullPayloadHolder.instance;
41 }
42
43 @Override
44 public boolean equals(Object obj)
45 {
46 return obj instanceof NullPayload;
47 }
48
49 @Override
50 public int hashCode ()
51 {
52 return 1;
53 }
54
55 @Override
56 public String toString()
57 {
58 return "{NullPayload}";
59 }
60
61 }