[SNMP4J] SNMP4J and CORBA "Any" class

[Marco.Bresciani at alcatel.it]

I'm working on a SNMPv2c implementation, by replacing existing proprietary 
methods of a class with SNMP4J method and functionalities. I have to 
replace methods content only, without modifying methods signatures and so 
on... I have an "init" method that does the following...

/* protocol setup */
if (pUDP == true) {

    /* UDP protocol selected */
    protocol = new String("udp");
} else {

    /* TCP protocol selected */
    protocol = new String("tcp");
}

/* transport level selection */
transport = null;
try {
    if (pUDP == true) {
        transport = new DefaultUdpTransportMapping();
    } else {
        transport = new DefaultTcpTransportMapping();
    }
} catch (Exception e) {

    /* error on transport level creation */
    System.err.println("Converter.init(String, int, boolean) e1: " + e);
    ConverterInitialized = false;
    e.printStackTrace();
}

/* SNMP activation */
snmp = new Snmp(transport);

/* SNMP v2c message processor */
proc2c = (MPv2c) 
snmp.getMessageProcessingModel(MessageProcessingModel.MPv2c);
snmp.addTransportMapping(transport);

/* starting SNMP management */
try {
    transport.listen();
} catch (Exception e) {

    /* error on transport level activation */
    System.err.println("Converter.init(String, int, boolean) e2: " + e);
    ConverterInitialized = false;
    e.printStackTrace();
}
ConverterInitialized = true;

/* target device */
device = new CommunityTarget();
device.setCommunity(new OctetString("public"));
device.setVersion(SnmpConstants.version2c);
device.setAddress(targetURL);    // can't set it because target URL is 
received by each single "get*" and "set*" SNMP methods. Init does not know 
about URL...
device.setRetries(2);            // is this needed? It depends on SNMP 
device?
device.setTimeout(1500);         // is this needed? It depends on SNMP 
device?






and it seems to work fine. So, I'm working on a "getObject" method and I 
wrote the following code:

/* block variables definition */
String tmpAddr = null;
PDU pdu_data = new PDU();
ResponseEvent replyEvent = null;

/* IP address setup */
tmpAddr = getIpAddress(xmlProperty);
targetURL = GenericAddress.parse(protocol + ":" + tmpAddr + "/" + 
SNMP_WELL_KNOWN_PORT);
if (targetURL == null) {

    /* wrong target URL management */
    System.err.println("Converter.getObject(String, String, String, 
ApplicationStructure).");
    ConverterInitialized = false;
    return -1;
}
device.setAddress(targetURL);

/* SNMP query creation */
pdu_data.add(new VariableBinding(new OID(oid)));
pdu_data.setType(PDU.GET);
try {
    replyEvent = snmp.send(pdu_data, device, transport/*, null, 
receiver*/);
    if (replyEvent != null) {

        /* block variables declaration */
        Variable data;

        /* block variables definition */
        PDU response = replyEvent.getResponse();
        Vector result = response.getVariableBindings();

THEN... I HAVE THIS PART OF CODE THAT IS INHERITED FROM OLDER VERSION OF 
THIS METHOD AND THAT I HAVE TO USE TO PRODUCE THE SAME KIND OF DATA...

    Any[] pp1 = new Any[1];
    pp1[0] = orb.create_any();
    Any p3 = orb.create_any();
    AttrVal p0 = new AttrVal(oid, pp1, ASNSnmpType.Null, p3);
    AttrValHolder p1 = new AttrValHolder(p0);

SO I WROTE THIS PART OF CODE...

    /* used structure conversion */
    data = ((VariableBinding) result.get(0)).getVariable();

AND THE FINAL INSTRUCTION IS, AGAIN, AN OLD ONE I SHOULD KEEP TO ASSURE 
RETRO-COMPATIBILITY WITH THE REST OF THE CODE:

holder.setData((Object) 
Converter.convertToStructure(holder.getStructureClass(), fieldName, p1));



I HAVE TO DO THIS: how can I map a "Variable" data (or 
"VariableBinding"... or tell me which is the correct class...) on a CORBA 
"Any" class?! AttrVal and AttrValHolder are proprietary class but I can 
easily circumvent them by directly modifying the pp1[0] object that is a 
standard "Any" class of the org.omg.CORBA package so that the last 
"holder.setData" instruction (and the classes that will use those data) 
will manage the correct data format.

Please help me!!! :-) Thank you in advance for "Any" ;-) help,

Dott. Ing. Marco Bresciani

-- 
Alcatel - WTD R&D SW Lab. [Stage]
Via Trento, 30
20059 Vimercate (Mi) Italia
Phone: +39.039.686.5546
E-Mail: Marco.Bresciani at Alcatel.It