/**
* Converts variable to right object value
*
* @param variable snmp var
* @param clazz class type to narrow to
* @return object value
* @throws ClassCastException if error
* @throws java.net.UnknownHostException if error
*/
@SuppressWarnings("UnnecessaryBoxing")
private <T> T convert(Variable variable, Class<T> clazz)
throws ClassCastException, UnknownHostException {
switch (variable.getSyntax()) {
case org.snmp4j.smi.SMIConstants.EXCEPTION_END_OF_MIB_VIEW:
case org.snmp4j.smi.SMIConstants.EXCEPTION_NO_SUCH_INSTANCE:
case org.snmp4j.smi.SMIConstants.EXCEPTION_NO_SUCH_OBJECT:
return clazz.cast(new Exception(variable.toString()));
// case org.snmp4j.smi.SMIConstants.SYNTAX_BITS:
case org.snmp4j.smi.SMIConstants.SYNTAX_OCTET_STRING:
if (variable instanceof BitString) {
BitString bitString = (BitString) variable;
return clazz.cast(bitString.toString());
}
return clazz.cast(variable.toString());
case org.snmp4j.smi.SMIConstants.SYNTAX_COUNTER32:
return clazz.cast(new Integer(variable.toInt()));
case org.snmp4j.smi.SMIConstants.SYNTAX_COUNTER64:
return clazz.cast(new Long(variable.toLong()));
// case org.snmp4j.smi.SMIConstants.SYNTAX_GAUGE32:
case org.snmp4j.smi.SMIConstants.SYNTAX_UNSIGNED_INTEGER32:
if (variable instanceof Gauge32) {
Gauge32 bitString = (Gauge32) variable;
return clazz.cast(new Long(bitString.toLong()));
}
return clazz.cast(new Long(variable.toLong()));
// case org.snmp4j.smi.SMIConstants.SYNTAX_INTEGER:
case org.snmp4j.smi.SMIConstants.SYNTAX_INTEGER32:
return clazz.cast(new Integer(variable.toInt()));
case org.snmp4j.smi.SMIConstants.SYNTAX_IPADDRESS:
IpAddress ipAddress = (IpAddress) variable;
return clazz.cast(InetAddress.getByAddress(ipAddress.toByteArray()));
case org.snmp4j.smi.SMIConstants.SYNTAX_NULL:
return clazz.cast(variable.toString());
case org.snmp4j.smi.SMIConstants.SYNTAX_OBJECT_IDENTIFIER:
return clazz.cast(variable.toString());
case org.snmp4j.smi.SMIConstants.SYNTAX_OPAQUE:
return clazz.cast(variable.toString());
case org.snmp4j.smi.SMIConstants.SYNTAX_TIMETICKS:
return clazz.cast(new Long(variable.toLong()));
default:
throw new IllegalStateException();
}
}
private Object convertVar(Variable valueAsVar) {
Object retvalue = null;
if (valueAsVar != null) {
int type = valueAsVar.getSyntax();
if (valueAsVar instanceof OID) {
retvalue = valueAsVar;
} else if (valueAsVar instanceof UnsignedInteger32) {
if (valueAsVar instanceof TimeTicks) {
long epochcentisecond = valueAsVar.toLong();
retvalue = new Double(epochcentisecond / 100.0);
} else retvalue = valueAsVar.toLong();
} else if (valueAsVar instanceof Integer32) retvalue = valueAsVar.toInt();
else if (valueAsVar instanceof Counter64) retvalue = valueAsVar.toLong();
else if (valueAsVar instanceof OctetString) {
if (valueAsVar instanceof Opaque) {
retvalue = resolvOpaque((Opaque) valueAsVar);
} else {
// It might be a C string, try to remove the last 0;
// But only if the new string is printable
OctetString octetVar = (OctetString) valueAsVar;
int length = octetVar.length();
if (length > 1 && octetVar.get(length - 1) == 0) {
OctetString newVar = octetVar.substring(0, length - 1);
if (newVar.isPrintable()) {
valueAsVar = newVar;
logger.debug("Convertion an octet stream from " + octetVar + " to " + valueAsVar);
}
}
retvalue = valueAsVar.toString();
}
} else if (valueAsVar instanceof Null) {
retvalue = null;
} else if (valueAsVar instanceof IpAddress) {
retvalue = ((IpAddress) valueAsVar).getInetAddress();
} else {
logger.warn("Unknown syntax " + AbstractVariable.getSyntaxString(type));
}
}
return retvalue;
}
