org.opennms.protocols.snmp

Class SnmpUtil

java.lang.Object

org.opennms.protocols.snmp.SnmpUtil

public class SnmpUtil
extends java.lang.Object

This class provides a set of utilities that may be used by other package members. The util class maintains a dynamically created list of SnmpSyntax object that is uses to lookup received messages. The typeId() method of each SnmpSyntax object provides the comparision data for the received ASN.1 type.

Author:

Brian Weaver

See Also:

SnmpInt32, SnmpCounter32, SnmpGauge32, SnmpTimeTicks, SnmpOctetString, SnmpIPAddress, SnmpObjectId

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static java.util.ArrayList	m_syntaxArray The array of dynamically registred SnmpSyntax objects

Constructor Summary

Constructors

Constructor and Description
SnmpUtil()

Method Summary

Methods

Modifier and Type	Method and Description
(package private) static void	dumpHex(java.io.PrintStream out, byte[] data, int offset, int length) Dumps an array of byte to the output string as a sequence of hexadecimal digits.
static SnmpSyntax	getSyntaxObject(byte asnType) Used to dynamically lookup registered SnmpSyntax objects
static boolean	registerSyntax(SnmpSyntax obj) Used to register a SnmpSyntax object with the SnmpUtil class.
(package private) static void	rotate(byte[] arrayBuf, int begin, int pivot, int end) Rotates a give buffer area marked by begin, pivot, and end.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

m_syntaxArray

static java.util.ArrayList m_syntaxArray

The array of dynamically registred SnmpSyntax objects

Constructor Detail

SnmpUtil

public SnmpUtil()

Method Detail

registerSyntax

public static boolean registerSyntax(SnmpSyntax obj)

Used to register a SnmpSyntax object with the SnmpUtil class. Once registered it can be dynamically found based on it's typeId().

Parameters:

obj - The SnmpSyntax object to add

Returns:

True if the object is successfully added

getSyntaxObject

public static SnmpSyntax getSyntaxObject(byte asnType)

Used to dynamically lookup registered SnmpSyntax objects

Parameters:

asnType - The ASN.1 type to search for

Returns:

A new SnmpSyntax object of the appropiate type

rotate

static void rotate(byte[] arrayBuf,
          int begin,
          int pivot,
          int end)

Rotates a give buffer area marked by begin, pivot, and end. The pivot marks the point where the array between [pivot..end) are moved to the position marked by begin. The bytes between [begin..pivot) are shifted such that begin is at [begin+(end-pivot)].

Parameters:

buf - The buffer containing the data to rotate

begin - The start of the rotation

pivot - The pivot point for the rotation

end - The end of the rotational buffer

dumpHex

static void dumpHex(java.io.PrintStream out,
           byte[] data,
           int offset,
           int length)

Dumps an array of byte to the output string as a sequence of hexadecimal digits.

Parameters:

out - The output stream

data - The data to dump

offset - The start location within the data

length - The length of data to dump