hunt.proton.codec.impl.NullElement source code

1 /*
2  * hunt-proton: AMQP Protocol library for D programming language.
3  *
4  * Copyright (C) 2018-2019 HuntLabs
5  *
6  * Website: https://www.huntlabs.net/
7  *
8  * Licensed under the Apache-2.0 License.
9  *
10  */
11 
12 module hunt.proton.codec.impl.NullElement;
13 
14 import hunt.io.ByteBuffer;
15 import std.conv;
16 import hunt.proton.codec.impl.AtomicElement;
17 import hunt.proton.codec.impl.Element;
18 import hunt.proton.codec.impl.ArrayElement;
19 import hunt.proton.codec.impl.AbstractElement;
20 
21 import hunt.proton.codec.Data;
22 import hunt.Object;
23 
24 class NullElement : AtomicElement!Void
25 {
26     this(IElement parent, IElement prev)
27     {
28         super(parent, prev);
29     }
30 
31     public int size()
32     {
33         return isElementOfArray() ? 0 : 1;
34     }
35 
36     public Object getValue()
37     {
38         return null;
39     }
40 
41     public Data.DataType getDataType()
42     {
43         return Data.DataType.NULL;
44     }
45 
46     public int encode(ByteBuffer b)
47     {
48         if(b.hasRemaining() && !isElementOfArray())
49         {
50             b.put(cast(byte)0x40);
51             return 1;
52         }
53         return 0;
54     }
55 }