Thanks a lot sir Lorenz.
On Sun, Oct 2, 2016 at 5:30 AM, Lorenz B. < buehm...@informatik.uni-leipzig.de> wrote: > Yes, but according to Javadoc only if there is at most one value, > otherwise you get one of the values randomly. For multiple values you > would have to use listPropertyValues > > > Is it the right way to get int value from a property? > > > > RDFNode intValue =team1.getPropertyValue(wins); > > > > On Sun, Oct 2, 2016 at 4:27 AM, Lorenz B. < > > buehm...@informatik.uni-leipzig.de> wrote: > > > >> > >>> "You have to get the "wins" value for "team1" first" > >>> This is the basic problem I do not know how to get the int value from > >>> "wins"? > >> Not from "wins" but from the resource "team1" which is related by the > >> property "wins" to an integer value. If you do not understand this, you > >> will never be able to solve the problem and also do not ask the right > >> questions here. > >>> "you first have to get the "team1" individual/resource." > >>> I have individual like this: > >>> Individual team1 = team.createIndividual(ns + name); //name java > >> variable. > >> I told you to use Javadoc and the documentation of Jena which is quite > >> good. You have to learn to use Javadoc if you're programming in Java... > >> > >> https://jena.apache.org/documentation/javadoc/jena/ > >> org/apache/jena/ontology/Individual.html > >> > >> Now, try to find out which method makes sense for your needs. You have a > >> property and want its value(s) > >>> On Sat, Oct 1, 2016 at 8:20 AM, Lorenz B. < > >>> buehm...@informatik.uni-leipzig.de> wrote: > >>> > >>>> You have to get the "wins" value for "team1" first, then set the new > >>>> "wins" value for "team1" . That means you first have to get the > "team1" > >>>> individual/resource. > >>>> > >>>> RDF data model: > >>>> > >>>> team1 wins 3 > >>>> > >>>> team1 = is an individual resp. a resource > >>>> wins = is a data property > >>>> 3 = is a literal value > >>>> > >>>>> I am sorry Lorenz sir, > >>>>> Basically what I want to sum a team wins. When value is entered in > text > >>>>> field, it is saved as data property "Wins" value in the file i-e > team1 > >>>> Wins > >>>>> 3. Since this value 3 is stored in owl file, when another entry is > made > >>>> for > >>>>> Wins property, say 2, I want to sum this new value with the previous > >>>> value > >>>>> of Wins property so that it does not stored in the file as: > >>>>> team1 wins 2 > >>>>> team1 wins 3 > >>>>> > >>>>> *but rather it is stored as:* > >>>>> *team1 wins 5* > >>>>> > >>>>> // variable is java variable having integer value i-e 2 > >>>>> *Literal wins=model.createTypedLiteral(variable);* > >>>>> *int win_value=wins.getInt();* > >>>>> > >>>>> *I just want to sum win_value (i-e 2) with the value in data > property > >>>>> "Wins"* > >>>>> > >>>>> OntProperty winsProperty = model.getOntProperty(ns+ "Wins"); > >>>>> > >>>>> So without SPARQL, can we get integer value of data property Wins so > >> that > >>>>> we can do > >>>>> > >>>>> int total_wins= win_value+ (The value from data property Wins). > >>>>> > >>>>> Sorry again for these types of questions, but I am learning Jena > course > >>>> my > >>>>> own and I have not studied it in my Bachelor degree (But have to use > it > >>>> in > >>>>> my BS project) > >>>>> > >>>>> > >>>>> > >>>>> On Sat, Oct 1, 2016 at 7:07 AM, Lorenz B. < > >>>>> buehm...@informatik.uni-leipzig.de> wrote: > >>>>> > >>>>>> What the hell are you doing here?! Javadoc + Jena documentation is > >> your > >>>>>> friend. > >>>>>> > >>>>>> It does not fetch any data, but creates a property and a literal > with > >>>>>> the value that is the property object which is totally wrong. > >>>>>> > >>>>>> First, use proper variable names. > >>>>>> > >>>>>> > >>>>>>> Is this a proper way to fetch the int value from data property? > >>>>>>> > >>>>>>> OntProperty value=model.getOntProperty(ns+ "Wins"); > >>>>>> Obviously, this line creates a property object, i.e. call it > >> "property" > >>>>>> or "p" or "winsProperty" or whatever, but not value. > >>>>>> > >>>>>> OntProperty winsProperty = model.getOntProperty(ns+ "Wins"); > >>>>>> > >>>>>> > >>>>>>> Literal myliteral = model.createTypedLiteral(value); > >>>>>> This line creates a Literal object whose value is the property > object, > >>>>>> but that's totally wrong. If you want to create an int literal, use > an > >>>>>> integer as argument > >>>>>> > >>>>>> Literal myliteral = model.createTypedLiteral(3); > >>>>>> > >>>>>> > >>>>>> > >>>>>>> int sum=myliteral.getInt(); > >>>>>> Again weird naming of Java variables which makes the code unreadable > >> and > >>>>>> even more nobody will understand what you want to achieve. > >>>>>> The sum of what? > >>>>>>> sum=sum+1; > >>>>>> It should be clear that data is assigned to RDF resources, that > means > >>>>>> you need a resource as well ,that's why the RDF data model is made > of > >>>>>> triples (subject, predicate, object), and from the above code you > only > >>>>>> have predicate and object. > >>>>>> > >>>>>> -- > >>>>>> Lorenz Bühmann > >>>>>> AKSW group, University of Leipzig > >>>>>> Group: http://aksw.org - semantic web research center > >>>>>> > >>>>>> > >>>> -- > >>>> Lorenz Bühmann > >>>> AKSW group, University of Leipzig > >>>> Group: http://aksw.org - semantic web research center > >>>> > >>>> > >> -- > >> Lorenz Bühmann > >> AKSW group, University of Leipzig > >> Group: http://aksw.org - semantic web research center > >> > >> > -- > Lorenz Bühmann > AKSW group, University of Leipzig > Group: http://aksw.org - semantic web research center > >
