[jacorb-developer] JacOrb extracting enum values

[Dimitris Zampouras]

I am currently trying to extract a Structured event from a notification 
service from a telecommunication server under the MTNM TMF 3.14 standard.

The standard provides the idl files needed for the communication server.

The problem happens when I try to extract the filterable data of the 
structured event. A sequence of filterable data is a sequence of 
Properties that contain a name and a type Any. Therefore I have a method 
extractAny(Any any) that extracts values of any.

    for (Property p : ev.filterable_data) {
             Object anything = extractAny(p.value);

         if(anything instanceof String) {....}
         ...

    }

The extractAny function uses a switch case on the TCKind of any and 
extracts accordingly. For the enum value:

    case TCKind._tk_enum:
             ArrayList<String> enumeration = new ArrayList<>();
             try {
             for (int v = 0; v < any.type().member_count(); v++) {
                 enumeration.add(any.type().member_name(v));
             }
             } catch (BadKind ex) {
             ex.printStackTrace();
             } catch (Bounds ex) {
             ex.printStackTrace();
             }
             return "" +enumeration.get(any.extract_long()); *<--problem
    here*

I take all the values of the enum add them to an array and then by 
extracting the integer value of /any/ I conclude to which of all the 
enum data /any/ wants to point to.
I assumed this since enums(Java at least) consist of a set of options 
but you have to choose only one(i.e. DAY.Monday , you can have only one 
present day), therefore the any enum value contains all options but has 
a pointer(an int maybe?) to what the actual chosen value is.

Previously I was compiling the idl files with idlj java v1.7 and that 
operation was working.


I hope I have given you enough information, and thank you for your support!

I have attached the StructuredEvent.java and the CosNotification.idl 
that generates the StructuredEvent


On 10/03/2017 01:06 μμ, Phil Mesnier wrote:
> Hi Dimitris,
>
> Can you show us the code that is causing your trouble?
>
> Are you using IDL enums, or Java Enums?
>
> The point behind enums is that they represent an ordered collection of 
> discrete identities. The values used to represent these identities is 
> an implementation detail. So it sounds like you are overthinking the 
> problem. Perhaps for your use case an enum isn't the correct type to use.
>
> Let see your failing code and go from there. Don't just send a line or 
> two, can you make a representative IDL, Client, and Server that 
> illustrates what you are trying, but failing to do?
>
>
> On Fri, Mar 10, 2017 at 3:54 AM, Dimitris Zampouras 
> <dzampouras at gmail.com <mailto:dzampouras at gmail.com>> wrote:
>
>     Hello everyone!
>
>     I am new to Corba and I am having a hard time extracting an enum
>     value from an any object.
>
>     From what I have gathered an enum value holds some data members
>     like an array containing all the enum types.
>     I suppose there should be some kind of integer inside the Any that
>     shows which one of the enums it refers to.
>
>     The problem is that I cannot extract from the enum Any that int
>     value. All integer extractions fail( the long too etc.).
>
>     Am I in the correct path here? Do you have any sample code that
>     can help?
>
>     I am currently using JacOrb 3.8 and Java 1.7
>
>     Prior to changing to JacOrb I could extract the integer value from
>     the enum type
>
>     Thank you in advance!
>
>     dzamp
>
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>
>
>
> -- 
>
> Phil Mesnier
> Principal Engineer & Partner
> OCI | WE ARE SOFTWARE ENGINEERS.
> tel (314) 579-0066 x225 <tel:%28314%29%20579-0066>
> ObjectComputing.com
> <http://objectcomputing.com/>
>
>