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

(package private) static java.util.ArrayList

m_syntaxArray The array of dynamically registred SnmpSyntax objects

Constructor Summary

SnmpUtil()

Method Summary

(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