Examples with Dataset org.apache.jena.query.Dataset used on opensource projects

Example 26 with Dataset

use of org.apache.jena.query.Dataset in project jena by apache.

the class SpatialDatasetAssembler method open.

//    private DatasetAssembler datasetAssembler = new DatasetAssembler() ;
//    
//    public static Resource getType() { return textDataset ; }
/*
<#spatial_dataset> rdf:type     spatial:SpatialDataset ;
    spatial:dataset <#dataset> ;
    spatial:index   <#index> ;
    .

    */
@Override
public Dataset open(Assembler a, Resource root, Mode mode) {
    Resource dataset = GraphUtils.getResourceValue(root, pDataset);
    Resource index = GraphUtils.getResourceValue(root, pIndex);
    Dataset ds = (Dataset) a.open(dataset);
    SpatialIndex textIndex = (SpatialIndex) a.open(index);
    Dataset dst = SpatialDatasetFactory.create(ds, textIndex);
    return dst;
}

Example 27 with Dataset

use of org.apache.jena.query.Dataset in project jena by apache.

the class ExTDB_Txn2 method main.

public static void main(String... argv) {
    String directory = "MyDatabases/DB1";
    Dataset dataset = TDBFactory.createDataset(directory);
    // Start WRITE transaction. 
    //   It's possible to read from the datet inside the write transaction.
    //   An application can have other Datasets, in the same JVM, 
    //   tied to the same TDB database performing read
    //   transactions concurrently. If another write transaction
    //   starts, the call of dataset.begin(WRITE) blocks until
    //   existing writer finishes.
    dataset.begin(ReadWrite.WRITE);
    try {
        GraphStore graphStore = GraphStoreFactory.create(dataset);
        // Do a SPARQL Update.
        String sparqlUpdateString = StrUtils.strjoinNL("PREFIX . <http://example/>", "INSERT { :s :p ?now } WHERE { BIND(now() AS ?now) }");
        execUpdate(sparqlUpdateString, graphStore);
        dataset.commit();
    // Or call .abort()
    } finally {
        // Notify the end of the transaction.
        // The transaction was finished at the point .commit or .abort was called.
        // .end will force an abort() if no previous call to .commit() or .abort()
        // has occurred, so .end() help manage track the state of the transaction.
        // .end() can be called multiple times for the same .begin(WRITE)
        dataset.end();
    }
}

Example 28 with Dataset

use of org.apache.jena.query.Dataset in project jena by apache.

the class TestSpatialDatasetAssembler method testSimpleDatasetAssembler.

@Test
public void testSimpleDatasetAssembler() {
    Dataset dataset = (Dataset) Assembler.general.open(spec1);
    assertTrue(dataset.getContext().get(SpatialQuery.spatialIndex) instanceof SpatialIndexLucene);
}

Example 29 with Dataset

use of org.apache.jena.query.Dataset in project jena by apache.

the class ExTDB1 method main.

public static void main(String... argv) {
    // Direct way: Make a TDB-back Jena model in the named directory.
    String directory = "MyDatabases/DB1";
    Dataset ds = TDBFactory.createDataset(directory);
    Model model = ds.getDefaultModel();
    // ... do work ...
    // Close the dataset.
    ds.close();
}

Example 30 with Dataset

use of org.apache.jena.query.Dataset in project jena by apache.

the class ExTDB2 method main.

public static void main(String... argv) {
    String assemblerFile = "Store/tdb-assembler.ttl";
    Dataset ds = TDBFactory.assembleDataset(assemblerFile);
    // ... do work ...
    ds.close();
}