Examples with Graph org.apache.jena.graph.Graph used on opensource projects

Example 16 with Graph

use of org.apache.jena.graph.Graph in project jena by apache.

the class sdbload method loadOne.

private void loadOne(String filename, boolean replace) {
    Model model = null;
    Dataset dataset = null;
    PrefixMapping pmap;
    Lang lang = RDFLanguages.filenameToLang(filename);
    if (lang == null)
        throw new CmdException("Data syntax not recognized: " + filename);
    // --graph or not
    if (modGraph.getGraphName() != null) {
        model = modGraph.getModel(getStore());
        pmap = model;
    } else {
        dataset = SDBFactory.connectDataset(getStore());
        pmap = dataset.asDatasetGraph().getDefaultGraph().getPrefixMapping();
    }
    // For monitoring only.
    Graph monitorGraph = (model == null) ? null : model.getGraph();
    if (replace) {
        if (model != null)
            model.removeAll();
        else
            dataset.asDatasetGraph().clear();
    }
    boolean showProgress = isVerbose() || getModTime().timingEnabled();
    if (showProgress)
        output.print("Start load: %s", filename);
    StreamRDF stream = streamToStore(pmap, getStore());
    if (modGraph.getGraphName() != null) {
        Node gn = NodeFactory.createURI(modGraph.getGraphName());
        stream = StreamRDFLib.extendTriplesToQuads(gn, stream);
    }
    ProgressMonitor progress = null;
    if (showProgress) {
        progress = new ProgressMonitor(filename, 100_000, 10, output);
        stream = new ProgressStreamRDF(stream, progress);
    }
    if (progress != null)
        progress.start();
    // Load!
    RDFDataMgr.parse(stream, filename, lang);
    if (progress != null) {
        progress.finish();
        progress.finishMessage();
    }
}

Example 17 with Graph

use of org.apache.jena.graph.Graph in project jena by apache.

the class RDFDataMgr method loadGraph.

/** Create a memory Graph and read in some data
     * @see #read(Graph,String,Lang) 
     */
public static Graph loadGraph(String uri, Lang lang) {
    Graph g = createGraph();
    read(g, uri, lang);
    return g;
}

Example 18 with Graph

use of org.apache.jena.graph.Graph in project jena by apache.

the class RDFDataMgr method read.

/** Read triples into a model with chars from a StringReader.
     * @param model     Destination for the RDF read.
     * @param in        InputStream
     * @param base      Base URI 
     * @param lang      Language syntax
     */
public static void read(Model model, StringReader in, String base, Lang lang) {
    Graph g = model.getGraph();
    StreamRDF dest = StreamRDFLib.graph(g);
    parseFromReader(dest, in, base, lang, (Context) null);
}

Example 19 with Graph

use of org.apache.jena.graph.Graph in project jena by apache.

the class DatasetGraphCollection method delete.

@Override
public void delete(Quad quad) {
    Graph g = fetchGraph(quad.getGraph());
    if (g == null)
        throw new JenaException("No such graph: " + quad.getGraph());
    g.delete(quad.asTriple());
}

Example 20 with Graph

use of org.apache.jena.graph.Graph in project jena by apache.

the class DynamicDatasets method dynamicDataset.

/** Given a DatasetGraph and a query, form a DatasetGraph that 
     * is the dynamic dataset from the collection of graphs from the dataset
     * that go to make up the default graph (union) and named graphs.  
     */
public static DatasetGraph dynamicDataset(Collection<Node> defaultGraphs, Collection<Node> namedGraphs, DatasetGraph dsg, boolean defaultUnionGraph) {
    Graph dft = new GraphUnionRead(dsg, defaultGraphs);
    DatasetGraph dsg2 = new DatasetGraphMapLink(dft);
    // The named graphs.
    for (Node gn : namedGraphs) {
        Graph g = GraphOps.getGraph(dsg, gn);
        if (g != null)
            dsg2.addGraph(gn, g);
    }
    if (dsg.getContext() != null)
        dsg2.getContext().putAll(dsg.getContext());
    if (defaultUnionGraph && defaultGraphs.size() == 0) {
        // Create a union graph - there were no defaultGraphs explicitly named.
        Graph unionGraph = new GraphUnionRead(dsg, namedGraphs);
        dsg2.setDefaultGraph(unionGraph);
    }
    // read-only, <urn:x-arq:DefaultGraph> and <urn:x-arq:UnionGraph> processing.
    dsg2 = new DynamicDatasetGraph(dsg2);
    // Record what we've done.
    // c.f. "ARQConstants.sysDatasetDescription" which is used to pass in a  DatasetDescription
    dsg2.getContext().set(ARQConstants.symDatasetDefaultGraphs, defaultGraphs);
    dsg2.getContext().set(ARQConstants.symDatasetNamedGraphs, namedGraphs);
    return dsg2;
}