blob: 22180cf4a8e7d9d26c1227574c07efa5fc5d4fe4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
// Copyright (c) 1999-2004 Brian Wellington (bwelling@xbill.org)
package org.xbill.DNS;
/**
* Constants and functions relating to DNS classes. This is called DClass
* to avoid confusion with Class.
*
* @author Brian Wellington
*/
public final class DClass {
/** Internet */
public static final int IN = 1;
/** Chaos network (MIT) */
public static final int CH = 3;
/** Chaos network (MIT, alternate name) */
public static final int CHAOS = 3;
/** Hesiod name server (MIT) */
public static final int HS = 4;
/** Hesiod name server (MIT, alternate name) */
public static final int HESIOD = 4;
/** Special value used in dynamic update messages */
public static final int NONE = 254;
/** Matches any class */
public static final int ANY = 255;
private static class DClassMnemonic extends Mnemonic {
public
DClassMnemonic() {
super("DClass", CASE_UPPER);
setPrefix("CLASS");
}
public void
check(int val) {
DClass.check(val);
}
}
private static Mnemonic classes = new DClassMnemonic();
static {
classes.add(IN, "IN");
classes.add(CH, "CH");
classes.addAlias(CH, "CHAOS");
classes.add(HS, "HS");
classes.addAlias(HS, "HESIOD");
classes.add(NONE, "NONE");
classes.add(ANY, "ANY");
}
private
DClass() {}
/**
* Checks that a numeric DClass is valid.
* @throws InvalidDClassException The class is out of range.
*/
public static void
check(int i) {
if (i < 0 || i > 0xFFFF)
throw new InvalidDClassException(i);
}
/**
* Converts a numeric DClass into a String
* @return The canonical string representation of the class
* @throws InvalidDClassException The class is out of range.
*/
public static String
string(int i) {
return classes.getText(i);
}
/**
* Converts a String representation of a DClass into its numeric value
* @return The class code, or -1 on error.
*/
public static int
value(String s) {
return classes.getValue(s);
}
}
|
