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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* AirportBaseStationConfigurator
*
* Copyright (C) 2000, Jonathan Sevy <jsevy@mcs.drexel.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
package snmp;
import java.math.*;
/**
* Defines a 32-bit unsigned integer value; wraps if initialized with a larger value.
* @see snmp.SNMPInteger
*/
public class SNMPUInteger32 extends SNMPInteger
{
// maximum value is 2^32 - 1
private static BigInteger maxValue = new BigInteger("4294967295");
protected byte tag = SNMPBERCodec.SNMPUINTEGER32;
/**
* Initialize value to 0.
*/
public SNMPUInteger32()
{
this(0); // initialize value to 0
}
/**
* Initialize value to newValue; wrap if newValue too big for 32 bits.
*/
public SNMPUInteger32(long newValue)
{
value = new BigInteger(new Long(newValue).toString());
// wrap if value > maxValue
value = value.mod(maxValue);
}
/**
* Used to initialize from the BER encoding, usually received in a response from
* an SNMP device responding to an SNMPGetRequest.
* @throws SNMPBadValueException Indicates an invalid BER encoding supplied. Shouldn't
* occur in normal operation, i.e., when valid responses are received from devices.
*/
public SNMPUInteger32(byte[] enc)
throws SNMPBadValueException
{
extractValueFromBEREncoding(enc);
// wrap if value > maxValue
value = value.mod(maxValue);
}
/**
* Used to set the value with an instance of java.lang.Integer or
* java.lang.BigInteger. The value of the constructed SNMPUInteger32 object is the
* supplied value mod 2^32.
* @throws SNMPBadValueException Indicates an incorrect object type supplied.
*/
public void setValue(Object newValue)
throws SNMPBadValueException
{
if (newValue instanceof BigInteger)
{
value = (BigInteger)newValue;
value = value.mod(maxValue); // wrap when value exceeds 2^32
}
else if (newValue instanceof Integer)
{
value = value = new BigInteger(newValue.toString());
value = value.mod(maxValue); // wrap when value exceeds 2^32
}
else if (newValue instanceof String)
{
value = value = new BigInteger((String)newValue);
value = value.mod(maxValue); // wrap when value exceeds 2^32
}
else
throw new SNMPBadValueException(" Unsigned Integer: bad object supplied to set value ");
}
}
|
