If you really want to write each user to a separate file
I dont want each user to a separate file, rather I want to save all the
individuals/students in one file. Some times ago, it worked for me but I
have made some changes to my code and now when I enter an individual, it
replaces the existing one and hence saves only one at a time.
I have checked the model before saving it to a file, and the model contains
only one individual (replaces existing one), so I think the problem is not
in the file saving itself.
On Fri, Dec 2, 2016 at 12:23 PM, Claude Warren <cla...@xenei.com> wrote:
> It sounds to me like Kumar is thinking that he needs to store each student
> in an individual file and load that. Kumar, if that is the case then I
> think you misunderstand how the graph storage works. Or you have an
> unusual use case. In most cases you would simply write the entire graph to
> disk (Ususally using TDB as the storage engine as it will handle all the
> persistence for you). If you really want to write each user to a separate
> file then I would suggest creating a model using the Construct select to
> pull all the data about the user and then write that graph to disk using
> the standard graph.write() functionality.
>
> Claude
>
> On Fri, Dec 2, 2016 at 8:18 AM, Lorenz B. <
> buehm...@informatik.uni-leipzig.de> wrote:
>
> >
> >
> > > Hi
> > > I want to create student instances of my Student class and enter his
> > > details. Then at the end I writes model to the file.
> > >
> > > OntClass std = model.getOntClass(ns + "Student");
> > > Individual mystd = std.createIndividual(ns + stdname);
> > >
> > > In the file when I enter name of a student, i-e Bob, it saves to the
> file
> > > along other information like department, address etc.
> > > Next time, when I enter another student name, i-e Alice, it replaces
> > > previous instances of students and currently only one student is saved
> to
> > > file.
> > >
> > > I want record of all students so need all student instances. I used for
> > > file writing.
> > I don't understand the problem. You have to load the existing model and
> > add new individuals to it. If you don't open the existing model, indeed
> > only what's added to your new model will be saved to the file.
> > > try (FileOutputStream write = new FileOutputStream("D://
> students.owl"))
> > {
> > > model.write(write, "RDF/XML");
> > >
> > --
> > Lorenz Bühmann
> > AKSW group, University of Leipzig
> > Group: http://aksw.org - semantic web research center
> >
> >
>
>
> --
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>
