Package com.hp.hpl.jena.sparql.engine

Examples of com.hp.hpl.jena.sparql.engine.ExecutionContext

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        try {
            String sqlStr = store.getSQLGenerator().generateSQL(request, b.getSqlNode()) ;
            //System.out.println(sqlStr) ;
            ResultSetJDBC tableData = store.getConnection().execQuery(sqlStr) ;
            ExecutionContext execCxt = new ExecutionContext(new Context(), null, null, null) ;
            return b.assembleResults(tableData, BindingRoot.create(), execCxt) ;
        } catch (SQLException ex)
        { throw new SDBExceptionSQL(ex) ; }
    }
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    }

    @Override
    public QueryIterator eval(Op op, DatasetGraph dsg, Binding binding, Context context)
    {
        ExecutionContext execCxt = new ExecutionContext(context, dsg.getDefaultGraph(), dsg, QC.getFactory(context)) ;
       
        // This pattern is common to QueryEngineMain - find a sharing pattern
        if ( ! ( op instanceof OpSQL ) )
        {
            // Not top - invoke the main query engine as a framework to
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                    }
                    else
                    {
                        // Default action
                        ARQ.getContext().set(ARQConstants.sysCurrentTime, NodeFactoryExtra.nowAsDateTime()) ;
                        FunctionEnv env = new ExecutionContext(ARQ.getContext(), null, null, null) ;
                        NodeValue r = expr.eval(null, env) ;
                        //System.out.println(r.asQuotedString()) ;
                        Node n = r.asNode() ;
                        String s = FmtUtils.stringForNode(n) ;
                        System.out.println(s) ;
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//            opRun = op ;
//            if ( env.getContext().isTrueOrUndef(ARQ.propertyFunctions) )
//                opRun = Optimize.apply("Property Functions", new TransformPropertyFunction(env.getContext()), opRun) ;
//        }
       
        ExecutionContext execCxt = new ExecutionContext(env.getContext(),
                                                        env.getActiveGraph(),
                                                        env.getDataset(),
                                                        QC.getFactory(env.getContext())
                                                        ) ;
        QueryIterator qIter1 = QueryIterSingleton.create(binding, execCxt) ;
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        // This is a placeholder for code to specially handle explicitly named
        // default graph and union graph.
       
        if ( Quad.isDefaultGraph(gn) )
        {
            ExecutionContext cxt2 = new ExecutionContext(execCxt, execCxt.getDataset().getDefaultGraph()) ;
            return execute(subOp, input, cxt2) ;
        }
       
        if ( gn == Quad.unionGraph )
            Log.warn(this, "Not implemented yet: union default graph in general OpExecutor") ;
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    {
        iterator.setCallback(new Callback() { @Override
        public void call() { /* do nothing */ } });
        assertEquals(0, iterator.getReturnedElementCount());
        Context context = new Context() ;
        ExecutionContext executionContext = new ExecutionContext(context, (Graph)null, (DatasetGraph)null, (OpExecutorFactory)null) ;
        QueryIterSort qIter = new QueryIterSort(iterator, comparator, executionContext) ;
        try
        {
            assertEquals(0, iterator.getReturnedElementCount()) ;
            assertEquals(0, DataBagExaminer.countTemporaryFiles(qIter.db)) ;
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        iterator.setCallback(new Callback() { @Override
        public void call() { /* do nothing */ } });
        assertEquals(0, iterator.getReturnedElementCount());
        Context context = new Context() ;
        context.set(ARQ.spillToDiskThreshold, 10L) ;
        ExecutionContext executionContext = new ExecutionContext(context, (Graph)null, (DatasetGraph)null, (OpExecutorFactory)null) ;
        QueryIterSort qIter = new QueryIterSort(iterator, comparator, executionContext) ;
        try
        {
            assertEquals(0, iterator.getReturnedElementCount()) ;
            assertEquals(0, DataBagExaminer.countTemporaryFiles(qIter.db)) ;
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        iterator.setCallback(new Callback() { @Override
        public void call() { /* do nothing */ } });
        assertEquals(0, iterator.getReturnedElementCount());
        Context context = new Context() ;
        context.set(ARQ.spillToDiskThreshold, 10L) ;
        ExecutionContext executionContext = new ExecutionContext(context, (Graph)null, (DatasetGraph)null, (OpExecutorFactory)null) ;
        QueryIterSort qIter = new QueryIterSort(iterator, comparator, executionContext) ;
       
        // Usually qIter should be in a try/finally block, but we are testing the case that the user forgot to do that.
        // As a failsafe, QueryIteratorBase should close it when the iterator is exhausted.
        assertEquals(0, iterator.getReturnedElementCount()) ;
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    {

        assertEquals(0, iterator.getReturnedElementCount());
        Context context = new Context() ;
        context.set(ARQ.spillToDiskThreshold, 10L) ;
        ExecutionContext executionContext = new ExecutionContext(context, (Graph)null, (DatasetGraph)null, (OpExecutorFactory)null) ;
        QueryIterSort qIter = new QueryIterSort(iterator, comparator, executionContext) ;
        try
        {
            assertEquals(0, iterator.getReturnedElementCount()) ;
            assertEquals(0, DataBagExaminer.countTemporaryFiles(qIter.db)) ;
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    public void testCancelInterruptsExternalSortAfterStartingIteration()
    {
        assertEquals(0, iterator.getReturnedElementCount());
        Context context = new Context() ;
        context.set(ARQ.spillToDiskThreshold, 10L) ;
        ExecutionContext executionContext = new ExecutionContext(context, (Graph)null, (DatasetGraph)null, (OpExecutorFactory)null) ;
        QueryIterSort qIter = new QueryIterSort(iterator, comparator, executionContext) ;
        try
        {
            assertEquals(0, iterator.getReturnedElementCount()) ;
            assertEquals(0, DataBagExaminer.countTemporaryFiles(qIter.db)) ;
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Related Classes of com.hp.hpl.jena.sparql.engine.ExecutionContext

  • arq.qexpr
  • com.hp.hpl.jena.sdb.engine.QueryEngineSDB
  • com.hp.hpl.jena.sdb.store.TupleTable
  • com.hp.hpl.jena.sparql.engine.iterator.TestQueryIterSort
  • com.hp.hpl.jena.sparql.engine.main.iterator.QueryIterGraph$QueryIterGraphInner
  • com.hp.hpl.jena.sparql.engine.main.OpExecutor
  • com.hp.hpl.jena.sparql.engine.main.QueryEngineMain
  • com.hp.hpl.jena.sparql.engine.ref.Eval
  • com.hp.hpl.jena.sparql.engine.ref.QueryEngineRef
  • com.hp.hpl.jena.sparql.engine.TestTableLib
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