Re: Getting multiple classes for an Individual

[tina sani]

My individual employee is a type of Technical, Manager and Programmer. I
want to replace all these classes with only one class Worker.  I used the
following code, it supposed to replace it but it does not.
All these classes are defined in the code.

 if ((employee.hasOntClass(technical)) &&
(employee.hasOntClass(programmer)) && (employee.hasOntClass(manager)))
  {
  employee.setOntClass(worker);
  JOptionPane.showMessageDialog(null, "here are the three  classes");
  }

Though it display the message in the Dialog.

On Fri, Jan 27, 2017 at 12:57 PM, Lorenz B. <
buehm...@informatik.uni-leipzig.de> wrote:

> Why should a method called "listOntClasses" just return a single class?
> The usage of the plural form should be clear enough. And Javadoc Javadoc
> Javadoc,...
> > Dave, I have read some where that Individual#listOntClasses will only
> list
> > one class at one time.
> >
> > And yes employee is individual and programmer, manager and worker are
> class
> > variables.
> >
> > On Fri, Jan 27, 2017 at 12:23 AM, Dave Reynolds <
> dave.e.reyno...@gmail.com>
> > wrote:
> >
> >> On 26/01/2017 21:08, tina sani wrote:
> >>
> >>> Hi Dave, Will this work?
> >>>
> >>> if ((employee1.hasOntClass(programmer)) &&
> >>> ((employee1.hasOntClass(manager)) &&((employee1.hasOntClass(worker))
> >>> {
> >>>
> >>> }
> >>>
> >> Try it and see!
> >>
> >> There's not enough there for us to tell for sure. If the variable
> >> employee1 is an Individual and if variables programmer, manager and
> worker
> >> are all Resources correctly corresponding to your classes then that will
> >> test if that Individual has all three of those classes in the model
> >> (whether asserted or inferred by rules).
> >>
> >> To add to my earlier answer, if you have an Individual rather than just
> >> and OntResource then Individual#listOntClasses will enable you to
> enumerate
> >> the classes conveniently.
> >>
> >> Dave
> >>
> >>
> >> On Thu, Jan 26, 2017 at 11:32 PM, Dave Reynolds <
> dave.e.reyno...@gmail.com
> >>> wrote:
> >>>
> >>> On 26/01/2017 15:20, tina sani wrote:
>  How can I get all the classes of which an individual is a type? After
> > Jena
> > rules executed, my individual has multiple class like:
> > Employee001 is of type: Worker, Programmer, Manager.
> >
> > So can I get all these three classes in Jena ? I have read somewhere
> > that
> > getOntClass() only return one class at a time and that is on random
> > basis.
> >
> > See OntResource#listRDFTypes or, if you just have a Resource then
> >
>  Resource#listProperties(RDF.type) or, as Charles says, use SPARQL.
> 
>  Dave
> 
> 
> 
>  ---
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> 
> 
> >> ---
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> >>
> --
> Lorenz Bühmann
> AKSW group, University of Leipzig
> Group: http://aksw.org - semantic web research center
>
>

Re: Getting multiple classes for an Individual

[Lorenz B.]

Why should a method called "listOntClasses" just return a single class?
The usage of the plural form should be clear enough. And Javadoc Javadoc
Javadoc,...
> Dave, I have read some where that Individual#listOntClasses will only list
> one class at one time.
>
> And yes employee is individual and programmer, manager and worker are class
> variables.
>
> On Fri, Jan 27, 2017 at 12:23 AM, Dave Reynolds 
> wrote:
>
>> On 26/01/2017 21:08, tina sani wrote:
>>
>>> Hi Dave, Will this work?
>>>
>>> if ((employee1.hasOntClass(programmer)) &&
>>> ((employee1.hasOntClass(manager)) &&((employee1.hasOntClass(worker))
>>> {
>>>
>>> }
>>>
>> Try it and see!
>>
>> There's not enough there for us to tell for sure. If the variable
>> employee1 is an Individual and if variables programmer, manager and worker
>> are all Resources correctly corresponding to your classes then that will
>> test if that Individual has all three of those classes in the model
>> (whether asserted or inferred by rules).
>>
>> To add to my earlier answer, if you have an Individual rather than just
>> and OntResource then Individual#listOntClasses will enable you to enumerate
>> the classes conveniently.
>>
>> Dave
>>
>>
>> On Thu, Jan 26, 2017 at 11:32 PM, Dave Reynolds >> wrote:
>>>
>>> On 26/01/2017 15:20, tina sani wrote:
 How can I get all the classes of which an individual is a type? After
> Jena
> rules executed, my individual has multiple class like:
> Employee001 is of type: Worker, Programmer, Manager.
>
> So can I get all these three classes in Jena ? I have read somewhere
> that
> getOntClass() only return one class at a time and that is on random
> basis.
>
> See OntResource#listRDFTypes or, if you just have a Resource then
>
 Resource#listProperties(RDF.type) or, as Charles says, use SPARQL.

 Dave



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>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>>
>>
-- 
Lorenz Bühmann
AKSW group, University of Leipzig
Group: http://aksw.org - semantic web research center

Re: Getting multiple classes for an Individual

[Dave Reynolds]

On 26/01/17 21:28, tina sani wrote:

Dave, I have read some where that Individual#listOntClasses will only list
one class at one time.


No idea what you mean. It's an Iterator which will iterate over all of 
the OntClasses, and since it's also an ExtendedIterator it has 
convenience methods to gather all of the results into a Set or List for you.


Dave


And yes employee is individual and programmer, manager and worker are class
variables.

On Fri, Jan 27, 2017 at 12:23 AM, Dave Reynolds 
wrote:


On 26/01/2017 21:08, tina sani wrote:


Hi Dave, Will this work?

if ((employee1.hasOntClass(programmer)) &&
((employee1.hasOntClass(manager)) &&((employee1.hasOntClass(worker))
{

}



Try it and see!

There's not enough there for us to tell for sure. If the variable
employee1 is an Individual and if variables programmer, manager and worker
are all Resources correctly corresponding to your classes then that will
test if that Individual has all three of those classes in the model
(whether asserted or inferred by rules).

To add to my earlier answer, if you have an Individual rather than just
and OntResource then Individual#listOntClasses will enable you to enumerate
the classes conveniently.

Dave


On Thu, Jan 26, 2017 at 11:32 PM, Dave Reynolds 

Re: Getting multiple classes for an Individual

[tina sani]

Dave, I have read some where that Individual#listOntClasses will only list
one class at one time.

And yes employee is individual and programmer, manager and worker are class
variables.

On Fri, Jan 27, 2017 at 12:23 AM, Dave Reynolds 
wrote:

> On 26/01/2017 21:08, tina sani wrote:
>
>> Hi Dave, Will this work?
>>
>> if ((employee1.hasOntClass(programmer)) &&
>> ((employee1.hasOntClass(manager)) &&((employee1.hasOntClass(worker))
>> {
>>
>> }
>>
>
> Try it and see!
>
> There's not enough there for us to tell for sure. If the variable
> employee1 is an Individual and if variables programmer, manager and worker
> are all Resources correctly corresponding to your classes then that will
> test if that Individual has all three of those classes in the model
> (whether asserted or inferred by rules).
>
> To add to my earlier answer, if you have an Individual rather than just
> and OntResource then Individual#listOntClasses will enable you to enumerate
> the classes conveniently.
>
> Dave
>
>
> On Thu, Jan 26, 2017 at 11:32 PM, Dave Reynolds > >
>> wrote:
>>
>> On 26/01/2017 15:20, tina sani wrote:
>>>
>>> How can I get all the classes of which an individual is a type? After
 Jena
 rules executed, my individual has multiple class like:
 Employee001 is of type: Worker, Programmer, Manager.

 So can I get all these three classes in Jena ? I have read somewhere
 that
 getOntClass() only return one class at a time and that is on random
 basis.

 See OntResource#listRDFTypes or, if you just have a Resource then

>>> Resource#listProperties(RDF.type) or, as Charles says, use SPARQL.
>>>
>>> Dave
>>>
>>>
>>>
>>> ---
>>> This email has been checked for viruses by Avast antivirus software.
>>> https://www.avast.com/antivirus
>>>
>>>
>>>
>>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>

Re: Getting multiple classes for an Individual

[Dave Reynolds]

On 26/01/2017 21:08, tina sani wrote:

Hi Dave, Will this work?

if ((employee1.hasOntClass(programmer)) &&
((employee1.hasOntClass(manager)) &&((employee1.hasOntClass(worker))
{

}


Try it and see!

There's not enough there for us to tell for sure. If the variable 
employee1 is an Individual and if variables programmer, manager and 
worker are all Resources correctly corresponding to your classes then 
that will test if that Individual has all three of those classes in the 
model (whether asserted or inferred by rules).


To add to my earlier answer, if you have an Individual rather than just 
and OntResource then Individual#listOntClasses will enable you to 
enumerate the classes conveniently.


Dave


On Thu, Jan 26, 2017 at 11:32 PM, Dave Reynolds 
wrote:


On 26/01/2017 15:20, tina sani wrote:


How can I get all the classes of which an individual is a type? After Jena
rules executed, my individual has multiple class like:
Employee001 is of type: Worker, Programmer, Manager.

So can I get all these three classes in Jena ? I have read somewhere that
getOntClass() only return one class at a time and that is on random basis.

See OntResource#listRDFTypes or, if you just have a Resource then

Resource#listProperties(RDF.type) or, as Charles says, use SPARQL.

Dave



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Re: Getting multiple classes for an Individual

[tina sani]

Hi Dave, Will this work?

if ((employee1.hasOntClass(programmer)) &&
((employee1.hasOntClass(manager)) &&((employee1.hasOntClass(worker))
{

}

On Thu, Jan 26, 2017 at 11:32 PM, Dave Reynolds 
wrote:

> On 26/01/2017 15:20, tina sani wrote:
>
>> How can I get all the classes of which an individual is a type? After Jena
>> rules executed, my individual has multiple class like:
>> Employee001 is of type: Worker, Programmer, Manager.
>>
>> So can I get all these three classes in Jena ? I have read somewhere that
>> getOntClass() only return one class at a time and that is on random basis.
>>
>> See OntResource#listRDFTypes or, if you just have a Resource then
> Resource#listProperties(RDF.type) or, as Charles says, use SPARQL.
>
> Dave
>
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>

Re: Getting multiple classes for an Individual

[Dave Reynolds]

On 26/01/2017 20:58, Olatunde Ayanleye wrote:

Hello Dave,
Thanks for the prompt reply, but i have tried this approach but i only get the 
Super classes inferred.I can't get the subclass which i was expecting jena to 
infer based on data property restriction.


That will depend on how you have inference set up, whether your model 
includes the ontology declarations and whether your declarations are 
correct.


In particular you said you were running your own rule. To get OWL 
inference on top of those you will either need to include the OWL rules 
in your rule set (and set the reasoner config accordingly) or you will 
need to layer an OWL InfModel on top of your GenericReasoner InfModel.


Dave


Kind regards,Olatunde

On Thursday, 26 January 2017, 20:32, Dave Reynolds 
 wrote:


 On 26/01/2017 15:20, tina sani wrote:

How can I get all the classes of which an individual is a type? After Jena
rules executed, my individual has multiple class like:
Employee001 is of type: Worker, Programmer, Manager.

So can I get all these three classes in Jena ? I have read somewhere that
getOntClass() only return one class at a time and that is on random basis.


See OntResource#listRDFTypes or, if you just have a Resource then
Resource#listProperties(RDF.type) or, as Charles says, use SPARQL.

Dave



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