Examples with BasicPattern org.apache.jena.sparql.core.BasicPattern used on opensource projects

Example 1 with BasicPattern

use of org.apache.jena.sparql.core.BasicPattern in project jena by apache.

the class OpExecutor method execute.

// ---- All the cases
protected QueryIterator execute(OpBGP opBGP, QueryIterator input) {
    BasicPattern pattern = opBGP.getPattern();
    QueryIterator qIter = stageGenerator.execute(pattern, input, execCxt);
    if (hideBNodeVars)
        qIter = new QueryIterDistinguishedVars(qIter, execCxt);
    return qIter;
}

Example 2 with BasicPattern

use of org.apache.jena.sparql.core.BasicPattern in project jena by apache.

the class GraphSPARQLService method graphBaseFind.

//    @Override
//    public Capabilities getCapabilities()
//    { 
//    	if (capabilities == null)
//            capabilities = new AllCapabilities()
//        	  { @Override public boolean handlesLiteralTyping() { return false; } };
//        return capabilities;
//    }
@Override
protected ExtendedIterator<Triple> graphBaseFind(Triple m) {
    Node s = m.getMatchSubject();
    Var sVar = null;
    if (s == null) {
        sVar = Var.alloc("s");
        s = sVar;
    }
    Node p = m.getMatchPredicate();
    Var pVar = null;
    if (p == null) {
        pVar = Var.alloc("p");
        p = pVar;
    }
    Node o = m.getMatchObject();
    Var oVar = null;
    if (o == null) {
        oVar = Var.alloc("o");
        o = oVar;
    }
    Triple triple = new Triple(s, p, o);
    // Evaluate as an algebra expression
    BasicPattern pattern = new BasicPattern();
    pattern.add(triple);
    Op op = new OpBGP(pattern);
    //        return WrappedIterator.createNoRemove(triples.iterator()) ;
    return null;
}

Example 3 with BasicPattern

use of org.apache.jena.sparql.core.BasicPattern in project jena by apache.

the class NodeTransformOp method transform.

@Override
public Op transform(OpQuadPattern opQuadPattern) {
    // The internal representation is (graph, BGP)
    BasicPattern bgp2 = NodeTransformLib.transform(transform, opQuadPattern.getBasicPattern());
    Node g2 = opQuadPattern.getGraphNode();
    g2 = transform.apply(g2);
    if (g2 == opQuadPattern.getGraphNode() && bgp2 == opQuadPattern.getBasicPattern())
        return super.transform(opQuadPattern);
    return new OpQuadPattern(g2, bgp2);
}

Example 4 with BasicPattern

use of org.apache.jena.sparql.core.BasicPattern in project jena by apache.

the class TransformReorder method transform.

/**
	 * Transforms BGPs with the reordering
	 */
@Override
public Op transform(OpBGP opBGP) {
    BasicPattern pattern = opBGP.getPattern();
    if (pattern.size() < 2)
        return opBGP;
    BasicPattern pattern2 = reorder.reorder(pattern);
    return new OpBGP(pattern2);
}

Example 5 with BasicPattern

use of org.apache.jena.sparql.core.BasicPattern in project jena by apache.

the class TransformMergeBGPs method transform.

@Override
public Op transform(OpJoin opJoin, Op left, Op right) {
    BasicPattern p1 = asBGP(left);
    BasicPattern p2 = asBGP(right);
    if (p1 != null && p2 != null) {
        BasicPattern p = merge(p1, p2);
        return new OpBGP(p);
    }
    return super.transform(opJoin, left, right);
}