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 > >
