Examples of com.hp.hpl.jena.tdb.store.DatasetGraphTDB

com.hp.hpl.jena.tdb.store.DatasetGraphTDB
This is the class that creates a dataset over the storage via TripleTable, QuadTable and prefixes. These may be transactional. See also:
- {@link DatasetGraphTxn} – the sublcass that provides a single tranasaction
- {@link DatasetGraphTransaction} – class that provides the application with the right DatasetGraphTDB (base or transaction).

            {
                case READ : System.out.print("r") ; break ;
                case WRITE : System.out.print("w") ; break ;
            }
        
        DatasetGraphTDB dsg = baseDataset ;
        // *** But, if there are pending, committed transactions, use latest.
        if ( ! commitedAwaitingFlush.isEmpty() )
        {  
            if ( DEBUG ) System.out.print(commitedAwaitingFlush.size()) ;
            dsg = commitedAwaitingFlush.get(commitedAwaitingFlush.size()-1).getActiveDataset().getView() ;

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        //    lastreader
        
        if ( mode == ReadWrite.READ )
        {   
            // If a READ transaction, and a previously built one is cached, use it.
            DatasetGraphTDB dsgCached = currentReaderView.get();
            if ( dsgCached != null )
            {
                // No components so we don't need to notify them.
                // We can just reuse the storage dataset.
                return new DatasetGraphTxn(dsgCached, txn) ;

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    public static void replay(Transaction transaction)
    {
        if ( syslog.isDebugEnabled())
            syslog.debug("Replay "+transaction.getLabel()) ;
        Journal journal = transaction.getJournal() ;
        DatasetGraphTDB dsg = transaction.getBaseDataset() ;
        // Currently, we (crudely) replay the whole journal.
        replay(journal, dsg.getConfig()) ;
    }

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        this.blockMgrs = dsg.getConfig().blockMgrs ;
        this.nodeTables = dsg.getConfig().nodeTables ;
        this.txn = transaction ;
        this.dsg = dsg ;
        
        DatasetGraphTDB dsgTDB ;
            
        switch(mode)
        {
            case READ : dsgTDB = buildReadonly() ; break ;
            case WRITE : dsgTDB = buildWritable() ;  break ;

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    private DatasetGraphTDB buildReadonly()
    {
        BlockMgrBuilder blockMgrBuilder = new BlockMgrBuilderReadonly() ;
        NodeTableBuilder nodeTableBuilder = new NodeTableBuilderReadonly() ;
        DatasetBuilderStd x = new DatasetBuilderStd(blockMgrBuilder, nodeTableBuilder) ;
        DatasetGraphTDB dsg2 = x._build(dsg.getLocation(), dsg.getConfig().params, false, dsg.getReorderTransform()) ;
        
        return dsg2 ;
    }

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    private DatasetGraphTDB buildWritable()
    {
        BlockMgrBuilder blockMgrBuilder = new BlockMgrBuilderTx() ;
        NodeTableBuilder nodeTableBuilder = new NodeTableBuilderTx() ;
        DatasetBuilderStd x = new DatasetBuilderStd(blockMgrBuilder, nodeTableBuilder) ;
        DatasetGraphTDB dsg2 = x._build(dsg.getLocation(), dsg.getConfig().params, true, dsg.getReorderTransform()) ;
        dsg2.getContext().putAll(dsg.getContext()) ;
        return dsg2 ;
    }

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        // (filter (quadpattern ...))
        if ( opFilter.getSubOp() instanceof OpQuadPattern )
        {
            OpQuadPattern quadPattern = (OpQuadPattern)opFilter.getSubOp() ;
            DatasetGraphTDB ds = (DatasetGraphTDB)execCxt.getDataset() ;
            return optimizeExecuteQuads(ds, input,
                                        quadPattern.getGraphNode(), quadPattern.getBasicPattern(),
                                        opFilter.getExprs(), execCxt) ;
        }

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    //        DatasetGraph dg = execCxt.getDataset() ;
    //        if ( ! ( dg instanceof DatasetGraphTDB ) )
    //            throw new InternalErrorException("Not a TDB backed dataset in quad pattern execution") ;
        
        DatasetGraphTDB ds = (DatasetGraphTDB)execCxt.getDataset() ;
        BasicPattern bgp = quadPattern.getBasicPattern() ;
        Node gn = quadPattern.getGraphNode() ;
        return optimizeExecuteQuads(ds, input, gn, bgp, null, execCxt) ;
    }

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    {
        // Is it the real default graph (normal route or explicitly named)?
        if ( ! isDefaultGraphStorage(graph.getGraphName()))
        {
            // Not default storage - it's a named graph in storage. 
            DatasetGraphTDB ds = graph.getDSG() ;
            return optimizeExecuteQuads(ds, input, graph.getGraphName(), opBGP.getPattern(), exprs, execCxt) ;
        }
        
        // Execute a BGP on the real default graph
        return optimizeExecuteTriples(graph, input, opBGP.getPattern(), exprs, execCxt) ;

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    }
    
    @Override
    protected QueryIterator execute(OpDatasetNames dsNames, QueryIterator input)
    { 
        DatasetGraphTDB ds = (DatasetGraphTDB)execCxt.getDataset() ;
        Filter<Tuple<NodeId>> filter = QC2.getFilter(execCxt.getContext()) ;
        Node gn = dsNames.getGraphNode() ;
        if ( Var.isVar(gn) )
            return SolverLib.graphNames(ds, dsNames.getGraphNode(), input, filter, execCxt) ;
        else

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