Thanks for answers ! - About http://callimachusproject.org/ : interesting but I have to create application from scratch, because very specific
- About PA4RDF : It seems very interessant. Any other tutorial, related post or tip ? Olivier, what do you exactly mean by "a bean <-> graph mapper" ? I generate an OWL ontology, that is my structure of data. I will modelise beans inspiring this structure. Say owl properties will be java class properties. And RDF class's inheritance will be mapped to java inheritance. Do you agree ? However, it appears that the POJO class of PA4RDF limits the inheritance. The example here http://pa4rdf.sourceforge.net/examples/concreteClassSubject.html could feet with user <- student inheritance ? Or will I have to duplicate code for Teacher & Student as they inherite from User ? Thanks again for this link Olivier ! Nicolas PARIS 2015-01-05 15:44 GMT+01:00 Olivier Rossel <[email protected]>: > There was a discussion some weeks ago about PA4RDF. > It might be a good starting point, in you think a bean <-> graph mapper > could be useful in your case. > > Also http://callimachusproject.org/ could be another interesting > project to investigate in your case. > > On Mon, Jan 5, 2015 at 2:41 PM, Nicolas Paris <[email protected]> wrote: >> Hello, >> >> I am creating a web semantic application, were persistant data is all >> stored in triple store (TDB). >> I mean, users(foaf), parameters etc. >> This application is an e-learning application, with exercices >> proposition based on reasonners. >> >> I want to use a classic MVC design pattern (jsp / servlets / javabeans). >> So a javabeans user, teacher, and student with heritage. >> My naïve aproach would be to initialise jbeans from TDB, using jena >> model getInstance etc. Or Sparql Querys with ARQ >> and my setters will do both : >> - set jbeans propertys >> - modify triple (dataset jena setProperty ; dataset commit , OR SPARQL >> querys) >> >> Example bad pseudo-code: >> Class student extends user { >> private Integer age; >> private Ressource student = myModel.getIndividual( >> "http://www.myexample.com/mySchema#student1"; ); >> >> public void setAge(Integer age){ >> this.age = age; //modify jbeans property >> student.setPropertyValue("http://www.myexample.com/mySchema#age","1^^integer";) >> # modify TDB valyue >> } >> >> } >> >> >> 1) Are there good practice or some DAO to design ? >> 2) In term of performances, is it better to use ARQ (sparql) OR jena >> ontologie API ? >> (3) is it a good choice to store all in a triple store ? (versus >> traditional relational databases) ) >> >> Thanks a lot >> >> >> >> Nicolas PARIS
