Package com.hp.hpl.jena.graph

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

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        BasicPattern bp = new BasicPattern() ;
        Var var_x = Var.alloc("x") ;
        Var var_z = Var.alloc("z") ;
       
        // ---- Build expression
        bp.add(new Triple(var_x, Node.createURI(BASE+"p"), var_z)) ;
        Op op = new OpBGP(bp) ;
        //Expr expr = ExprUtils.parse("?z < 2 ") ;
        Expr expr = new E_LessThan(new ExprVar(var_z), NodeValue.makeNodeInteger(2)) ;
        op = OpFilter.filter(expr, op) ;
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        ElementGroup elg = new ElementGroup() ;
       
        Var varTitle = Var.alloc("title") ;
        Var varX = Var.alloc("x") ;
       
        Triple t1 = new Triple(varX, DC.title.asNode(),  varTitle) ;
        elg.addTriplePattern(t1) ;
       
        // Adds a filter.  Need to wrap variable in a NodeVar.
        Expr expr = new E_Regex(new ExprVar(varTitle), "sparql", "i") ;
        ElementFilter filter = new  ElementFilter(expr) ;
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        ElementGroup elg = new ElementGroup() ;
       
        Var varTitle = Var.alloc("title") ;
        Var varX = Var.alloc("x") ;
       
        Triple t1 = new Triple(varX, DC.title.asNode(),  varTitle) ;
        elg.addTriplePattern(t1) ;
       
        // Don't use bNodes for anon variables.  The conversion is done in parsing.
        // BNodes here are assumed to be values from the target graph.
        Triple t2 = new Triple(varX, DC.description.asNode(), Var.alloc("desc")) ;
        elg.addTriplePattern(t2) ;
       
        // Attach the group to query. 
        query.setQueryPattern(elg) ;
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        // Better
        // Build a SPARQL algebra expression
        Var var2 = createNewVar() ;                     // Hidden variable
       
        BasicPattern bp = new BasicPattern() ;
        Triple t = new Triple(nodeVar, RDFS.label.asNode(), var2) ;
        bp.add(t) ;
        OpBGP op = new OpBGP(bp) ;
       
        Expr regex = new E_Regex(new ExprVar(var2.getName()), pattern, "i") ;
        Op filter = OpFilter.filter(regex, op) ;
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    private QueryIterator buildSyntax(QueryIterator input, Node nodeVar, String pattern, ExecutionContext execCxt)
    {
        Var var2 = createNewVar() ;
        // Triple patterns for   ?x rdfs:label ?hiddenVar
        ElementTriplesBlock elementBGP = new ElementTriplesBlock();
        Triple t = new Triple(nodeVar, RDFS.label.asNode(), var2) ;
        elementBGP.addTriple(t) ;
       
        // Regular expression for  regex(?hiddenVar, "pattern", "i")
        Expr regex = new E_Regex(new ExprVar(var2.getName()), pattern, "i") ;
       
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        Graph graph = execCxt.getActiveGraph() ;
       
        ExtendedIterator<Triple>iter = graph.find(Node.ANY, Node.ANY, Node.ANY) ;
        for ( ; iter.hasNext() ; )
        {
            Triple t = iter.next() ;
            slot(bindings, input, t.getSubject(),   subjVar, nodeLocalname) ;
            slot(bindings, input, t.getPredicate(), subjVar, nodeLocalname) ;
            slot(bindings, input, t.getObject(),    subjVar, nodeLocalname) ;
        }
        return new QueryIterPlainWrapper(bindings.iterator(), execCxt) ;
    }
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    InfGraph graph = context.getGraph();
    Node s = env.getGroundVersion(args[0]);
    Node p = env.getGroundVersion(args[1]);
    Node o = env.getGroundVersion(args[2]);
    try {
      Triple t = Triple.create(s,p,o);
      Reifier r = graph.getReifier();
      Node a = Node.createAnon();
      r.reifyAs(a,t);
      env.bind(args[3],a);
      return true;
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    InfGraph graph = context.getGraph();
    Node s = env.getGroundVersion(args[0]);
    Node p = env.getGroundVersion(args[1]);
    Node o = env.getGroundVersion(args[2]);
    try {
      Triple t = Triple.create(s,p,o);
      context.add(t);
      Node a = Node.createAnon();
      Reifier r = graph.getReifier();
      r.reifyAs(a,t);
      env.bind(args[3],a);
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        @Override
        public void visit(OpPropFunc opPropFunc)
        {
            Node s = processPropFuncArg(opPropFunc.getSubjectArgs()) ;
            Node o = processPropFuncArg(opPropFunc.getObjectArgs()) ;
            Triple t = new Triple(s, opPropFunc.getProperty(), o) ;
            currentGroup().addElement(process(t)) ;
        }
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        Node oNode = nodeTable.getNodeForNodeId(o) ;
        if ( oNode == null )
            throw new InternalErrorException("Invalid id node for object (null node): "+fmt(s,p,o)) ;
       
        return new Triple(sNode, pNode, oNode) ;
    }
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Related Classes of com.hp.hpl.jena.graph.Triple

  • arq.examples.AlgebraExec
  • arq.examples.ExProg1
  • arq.examples.ExProg2
  • arq.examples.propertyfunction.labelSearch
  • arq.examples.propertyfunction.localname
  • com.clarkparsia.pellet.sparqldl.parser.ARQParser
  • com.github.jsonldjava.jena.JenaRDFParser
  • com.github.jsonldjava.jena.JsonLDReader
  • com.hp.gloze.extension.Reify
  • com.hp.hpl.jena.graph.test.AbstractTestGraph
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