"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"?
"you first have to get the "team1" individual/resource." I have individual like this: Individual team1 = team.createIndividual(ns + name); //name java variable. 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 > >
