Examples of com.hp.hpl.jena.graph.Graph

com.hp.hpl.jena.graph.Graph
The interface to be satisfied by implementations maintaining collections of RDF triples. The core interface is small (add, delete, find, contains) and is augmented by additional classes to handle more complicated matters such as reification, query handling, bulk update, event management, and transaction handling.
For add(Triple) see GraphAdd.

        return graph ; 
    }
    
    private static Graph data(Triple... triples)
    {
        Graph graph = Factory.createDefaultGraph();
        graph.getBulkUpdateHandler().add(triples);
        return graph;
    }

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    @Test public void graph_03()
    {
        Node g = Node.createURI("g") ;
        DatasetGraph dsg = emptyDataset() ;
        Graph data = SSE.parseGraph("(graph (<s> <p> <o>))") ;
        dsg.addGraph(g, data) ;
        Quad quad = SSE.parseQuad("(quad <g> <s> <p> <o>)") ;
        assertTrue(dsg.contains(quad)) ;
    }

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                InputStream instream = entity.getContent() ;
//                String mimeType = ConNeg.chooseContentType(request, rdfOffer, ConNeg.acceptRDFXML).getAcceptType() ;
//                String charset = ConNeg.chooseCharset(request, charsetOffer, ConNeg.charsetUTF8).getAcceptType() ;
                ts = new TypedInputStream(instream, contentType, charset) ;
            }
            Graph graph = GraphFactory.createGraphMem() ;
            if ( processBody )
                readGraph(graph, ts, null) ;
            if ( ts != null )
                ts.close() ;
            Graph graph2 = new UnmodifiableGraph(graph) ;
            return graph2 ;
        } catch (IOException ex)
        {
            httpRequest.abort() ;
            return null ;

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{
    // ---- Model level
    
    public static Model readModel(String uri, int limit)
    {
        Graph g = Factory.createGraphMem() ;
        readUtil(g, uri, limit) ;
        return ModelFactory.createModelForGraph(g) ;
    }

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        return ModelFactory.createModelForGraph(g) ;
    }
    
    public static void loadModel(Model model, String uri, int limit) 
    {
        Graph g = model.getGraph() ;
        readUtil(g, uri, limit) ;
    }

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    // ---- Graph level
    
    public static Graph readGraph(String uri, int limit)
    {
        Graph g = Factory.createGraphMem() ;
        readUtil(g, uri, limit) ;
        return g ;
    }

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        ServletFileUpload upload = new ServletFileUpload();
        // Locking only needed over the insert into dataset
        try {
            String graphName = null ;
            Graph graphTmp = GraphFactory.createGraphMem() ;
            Node gn = null ;
            String name = null ;  
            ContentType ct = null ;
            Lang lang = null ;
            int tripleCount = 0 ;
            
            FileItemIterator iter = upload.getItemIterator(request);
            while (iter.hasNext()) {
                FileItemStream item = iter.next();
                String fieldName = item.getFieldName();
                InputStream stream = item.openStream();
                if (item.isFormField())
                {
                    // Graph name.
                    String value = Streams.asString(stream, "UTF-8") ;
                    if ( fieldName.equals(HttpNames.paramGraph) )
                    {
                        graphName = value ;
                        if ( graphName != null && ! graphName.equals(HttpNames.valueDefault) )
                        {
                            IRI iri = IRIResolver.parseIRI(value) ;
                            if ( iri.hasViolation(false) )
                                errorBadRequest("Bad IRI: "+graphName) ;
                            if ( iri.getScheme() == null )
                                errorBadRequest("Bad IRI: no IRI scheme name: "+graphName) ;
                            if ( iri.getScheme().equalsIgnoreCase("http") || iri.getScheme().equalsIgnoreCase("https")) 
                            {
                                // Redundant??
                                if ( iri.getRawHost() == null ) 
                                    errorBadRequest("Bad IRI: no host name: "+graphName) ;
                                if ( iri.getRawPath() == null || iri.getRawPath().length() == 0 )
                                    errorBadRequest("Bad IRI: no path: "+graphName) ;
                                if ( iri.getRawPath().charAt(0) != '/' )
                                    errorBadRequest("Bad IRI: Path does not start '/': "+graphName) ;
                            } 
                            gn = Node.createURI(graphName) ;
                        }
                    }
                    else if ( fieldName.equals(HttpNames.paramDefaultGraphURI) )
                        graphName = null ;
                    else
                        // Add file type?
                        log.info(format("[%d] Upload: Field="+fieldName+" - ignored")) ;
                } else {
                    // Process the input stream
                    name = item.getName() ; 
                    if ( name == null || name.equals("") || name.equals("UNSET FILE NAME") ) 
                        errorBadRequest("No name for content - can't determine RDF syntax") ;
                    
                    String contentTypeHeader = item.getContentType() ;
                    ct = ContentType.parse(contentTypeHeader) ;
                    
                    lang = FusekiLib.langFromContentType(ct.getContentType()) ;
                    if ( lang == null )
                        lang = Lang.guess(name) ;
                    if ( lang == null )
                        // Desperate.
                        lang = Lang.RDFXML ;
                    
                    String base = "http://example/upload-base/" ;
                    // We read into a in-memory graph, then (if successful) update the dataset.
                    // This isolates errors.
                    Sink<Triple> sink = new SinkTriplesToGraph(graphTmp) ;
                    LangRIOT parser = RiotReader.createParserTriples(stream, lang, base, sink) ;
                    parser.getProfile().setHandler(errorHandler) ;
                    try {
                        parser.parse() ;
                    } 
                    catch (RiotException ex) { errorBadRequest("Parse error: "+ex.getMessage()) ; }
                    finally { sink.close() ; }
                    
                    tripleCount = graphTmp.size() ;
                    //DatasetGraph dsgTmp = DatasetGraphFactory.create(graphTmp) ;
                }
            }    
                
            if ( graphName == null )

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            { super( name ); }
    
        @Override
        public Graph getGraph()
            {
            Graph base = Factory.createDefaultGraph();            
            return new ReificationWrapperGraph( base, ReificationStyle.Standard ); 
            }

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    protected static void clearGraph(Target target)
    {
        if ( ! target.isGraphSet() )
        {
            Graph g = target.graph() ;
            g.getBulkUpdateHandler().removeAll() ;
        }
    }

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    }


    protected static void addDataInto(Graph data, HttpActionREST action)
    {   
        Target dest = action.getTarget() ;
        Graph g = dest.graph() ;
        if ( g == null )
        {
            if ( dest.isDefault )
                errorOccurred("Dataset does not have a default graph") ;
            log.info(format("[%d] Creating in-memory graph for <%s>", action.id, dest.graphName)) ;
            // Not default graph.
            // Not an autocreate dataset - create something.
            g = GraphFactory.createDefaultGraph() ;
            dest.dsg.addGraph(dest.graphName, g) ;
        }
        g.getBulkUpdateHandler().add(data) ;
    }

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