Package com.hp.hpl.jena.sparql.algebra

Examples of com.hp.hpl.jena.sparql.algebra.Transform

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     * so that the default graph is the union of named graphs. 
     */
    public static Op unionDefaultGraphQuads(Op op)
    {
        // Rewrite so that any explicitly named "default graph" is union graph.
        Transform t = new TransformGraphRename(Quad.defaultGraphNodeGenerated, Quad.unionGraph)  ;
        op = Transformer.transform(t, op) ;
        return op ;
    }
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    @Override
    protected Op modifyOp(Op op)
    {
        // Just property functions
        Transform t = new TransformPropertyFunction(context) ;
        op = Transformer.transform(t, op) ;
        return op ;
    }
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public class NodeTransformLib
{
    /** Do a node->node conversion of an Op - return original BGP for "no change" */
    public static Op transform(NodeTransform nodeTransform, Op op)
    {
        Transform opTransform = new NodeTransformOp(nodeTransform) ;
        return Transformer.transform(opTransform, op) ;
    }
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public class NodeTransformLib
{
    /** Do a node->node conversion of an Op - return original BGP for "no change" */
    public static Op transform(NodeTransform nodeTransform, Op op)
    {
        Transform opTransform = new NodeTransformOp(nodeTransform) ;
        return Transformer.transform(opTransform, op) ;
    }
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    public static void testNoBGP(String input , String output ) {
        test$(input, output, false) ;
    }
       
    public static void test$(String input, String output, boolean includeBGPs) {
        Transform t_placement = new TransformFilterPlacement(includeBGPs) ;
        Op op1 = SSE.parseOp(input) ;
        Op op2 = Transformer.transform(t_placement, op1) ;
        if ( output == null ) {
            // No transformation.
            Assert.assertEquals(op1, op2) ;
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    @Override
    public QueryIterator eval(Op op, DatasetGraph dsg, Binding initial, Context context)
    {
        // Extension point: access possible to all the parameters for execution.
        // Be careful to deal with initial bindings.
        Transform transform = new VirtTransform() ;
        op = Transformer.transform(transform, op) ;
       
        VirtGraph vg = (VirtGraph)dsg.getDefaultGraph();
        String query = fixQuery(eQuery.toString(), initial, vg);
 
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    @Override
    public QueryIterator eval(Op op, DatasetGraph dsg, Binding initial, Context context)
    {
        // Extension point: access possible to all the parameters for execution.
        // Be careful to deal with initial bindings.
        Transform transform = new VirtTransform() ;
        op = Transformer.transform(transform, op) ;
       
        VirtGraph vg = (VirtGraph)dsg.getDefaultGraph();
        String query = fixQuery(eQuery.toString(), initial, vg);
 
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Related Classes of com.hp.hpl.jena.sparql.algebra.Transform

  • arq.examples.engine.MyQueryEngine
  • com.hp.hpl.jena.sdb.compiler.QueryCompilerMain
  • com.hp.hpl.jena.sdb.layout2.QueryCompiler2
  • com.hp.hpl.jena.sparql.algebra.optimize.TestTransformFilterPlacement
  • com.hp.hpl.jena.sparql.algebra.optimize.TestTransformTopN
  • com.hp.hpl.jena.sparql.engine.ref.QueryEngineRef
  • com.hp.hpl.jena.sparql.graph.NodeTransformLib
  • com.hp.hpl.jena.tdb.migrate.A2
  • com.hp.hpl.jena.tdb.migrate.TransformDynamicDataset_Imperfect
  • virtuoso.jena.driver.VirtuosoQueryEngine
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