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
