Examples with Model org.apache.jena.rdf.model.Model used on opensource projects

Example 96 with Model

use of org.apache.jena.rdf.model.Model in project jena by apache.

the class ExJsonLD method parse.

/** Parse a jsonld string into a Model */
private Model parse(String jsonld) {
    Model m = ModelFactory.createDefaultModel();
    StringReader reader = new StringReader(jsonld);
    m.read(reader, null, "JSON-LD");
    return m;
}

Example 97 with Model

use of org.apache.jena.rdf.model.Model in project jena by apache.

the class ExJsonLD method moreControl.

/**
     * To get more control about the output,
     * we have to use a mechanism provided by jena to pass information
     * to the writing process
     * 
     * This requires a few lines of code, see {@link #write(DatasetGraph, RDFFormat, Context)}
     * 
     * Here we use this write method to see what can be customized.
     */
public void moreControl() {
    Model m = aSimpleModel();
    m.setNsPrefix("ex", "http://www.ex.com/");
    m.setNsPrefix("sh", "http://schema.org/");
    // the write method takes a DatasetGraph as input to represent the data that we want to output
    // Let's create one from our model:
    DatasetGraph g = DatasetFactory.create(m).asDatasetGraph();
    // and let's use the write method to output the data in json-ld compact format,
    // passing a null Context for the moment
    // (remember, "Context" here is not to be confused with "@context" in JSON-LD,
    // see {@link #write(DatasetGraph, RDFFormat, Context)})
    System.out.println("\n--- COMPACT with a null Context: same result as default ---");
    write(g, RDFFormat.JSONLD_COMPACT_PRETTY, null);
    // A Context is just a way to pass implementation-specific parameters as named values
    // to a given general interface (the WriterDatasetRIOT, in this case).
    // In order to make it easier to define the named values relevant here,
    // there is a subclass of Context that defines setters for the values:
    // the JsonLDWriteContext class
    // so, the way to proceed is:
    // JsonLDWriteContext ctx = new JsonLDWriteContext();       
    // ctx.setSomething(...)
    // write(g, RDFFormat.JSONLD_COMPACT_PRETTY, ctx);
    // let's see now what can be customized with the JsonLDWriteContext object
    controllingAtContext();
    settingAtContextToURI();
    frame();
    controllingJsonLDApiOptions();
}

Example 98 with Model

use of org.apache.jena.rdf.model.Model in project jena by apache.

the class ExRIOT_1 method main.

public static void main(String... argv) {
    Model m = ModelFactory.createDefaultModel();
    // read into the model.
    m.read("data.ttl");
    // Alternatively, use the RDFDataMgr, which reads from the web,
    // with content negotiation.  Plain names are assumed to be 
    // local files where file extension indicates the syntax.  
    Model m2 = RDFDataMgr.loadModel("data.ttl");
    // read in more data, the remote server serves up the data
    // with the right MIME type.
    RDFDataMgr.read(m2, "http://host/some-published-data");
    // Read some data but also give a hint for the synatx if it is not
    // discovered by inspectying the file or by HTTP content negotiation.  
    RDFDataMgr.read(m2, "some-more-data.out", RDFLanguages.TURTLE);
}

Example 99 with Model

use of org.apache.jena.rdf.model.Model in project jena by apache.

the class ExRIOT_out1 method main.

public static void main(String[] args) {
    Model model = RDFDataMgr.loadModel("D.ttl");
    System.out.println();
    System.out.println("#### ---- Write as Turtle");
    System.out.println();
    RDFDataMgr.write(System.out, model, Lang.TURTLE);
    System.out.println();
    System.out.println("#### ---- Write as Turtle (streaming)");
    System.out.println();
    RDFDataMgr.write(System.out, model, RDFFormat.TURTLE_BLOCKS);
    System.out.println();
    System.out.println("#### ---- Write as Turtle via model.write");
    System.out.println();
    model.write(System.out, "TTL");
}

Example 100 with Model

use of org.apache.jena.rdf.model.Model in project jena by apache.

the class ExRIOT_out2 method main.

public static void main(String[] args) {
    Model model = RDFDataMgr.loadModel("D.ttl");
    System.out.println();
    System.out.println("#### ---- Write as TriG");
    System.out.println();
    // This wil be the default graph of the dataset written.
    RDFDataMgr.write(System.out, model, Lang.TRIG);
    // Loading Turtle as Trig reads into the default graph.
    Dataset dataset = RDFDataMgr.loadDataset("D.ttl");
    System.out.println();
    System.out.println("#### ---- Write as NQuads");
    System.out.println();
    RDFDataMgr.write(System.out, dataset, Lang.NQUADS);
}