Examples of com.hp.hpl.jena.reasoner.InfGraph

com.hp.hpl.jena.reasoner.InfGraph
Extends the Graph interface to give additional means to query an inferred graph. Many entailments from the raw data are made to appear as if they are extract triples in the inferred graph and so appear through the normal Graph.find interface. However, here are two extensions required. Firstly, the ability to ask about global properties of the whole graph (e.g. consistency). Secondly, the ability to temporarily construct expressions (encoded in RDF) which form more complex queries.

  /* (non-Javadoc)
   * @see com.hp.hpl.jena.reasoner.rulesys.Builtin#bodyCall(com.hp.hpl.jena.graph.Node[], int, com.hp.hpl.jena.reasoner.rulesys.RuleContext)
   */
  public boolean bodyCall(Node[] args, int length, RuleContext context) {
    BindingEnvironment env = context.getEnv();
    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;
    } catch (Exception e) {

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    }
  }
  
  public void headAction(Node[] args, int length, RuleContext context) {
    BindingEnvironment env = context.getEnv();
    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);
    } catch (Exception e) {
      e.printStackTrace(System.err);
    }

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    return "http://www.hp.com/gloze/extension/countValues";
  }


  public boolean bodyCall(Node[] args, int length, RuleContext context) {
    BindingEnvironment env = context.getEnv();
    InfGraph graph = context.getGraph();


    Node s = env.getGroundVersion(args[0]);
    Node p = env.getGroundVersion(args[1]);
    ExtendedIterator i = graph.find(s,p,null);
    int n = i.toSet().size();
    
    TypeMapper tm = TypeMapper.getInstance();
    RDFDatatype type = tm.getTypeByName(XSD.xint.getURI());
    Node count = Node.createLiteral(Integer.toString(n),null,type);

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     *
     * @param model the Model containing both instance data and schema assertions to be inferenced over
     */
    public static InfModel createRDFSModel(Model model) {
         Reasoner reasoner = ReasonerRegistry.getRDFSReasoner();
         InfGraph graph = reasoner.bind( model.getGraph() );
         return new InfModelImpl( graph );
    }

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     * @param model a Model containing instance data assertions
     * @param schema a Model containing RDFS schema data
     */
    public static InfModel createRDFSModel( Model schema, Model model ) {
         Reasoner reasoner = ReasonerRegistry.getRDFSReasoner();
         InfGraph graph  = reasoner.bindSchema(schema.getGraph()).bind(model.getGraph());
         return new InfModelImpl( graph );
    }

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     * @param reasoner the reasoner to use to process the data
     * @param model the Model containing both instance data and schema assertions to be inferenced over, 
     * any statements added to the InfModel will be added to this underlying data model.
     */
    public static InfModel createInfModel( Reasoner reasoner, Model model ) {
         InfGraph graph = reasoner.bind(model.getGraph());
         return new InfModelImpl(graph);
    }

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     * @param schema a Model containing RDFS schema data
     * @param model a Model containing instance data assertions, any statements added to the InfModel
     * will be added to this underlying data model.
     */
    public static InfModel createInfModel(Reasoner reasoner, Model schema, Model model) {
         InfGraph graph = reasoner.bindSchema(schema.getGraph()).bind(model.getGraph());
         return new InfModelImpl( graph );
    }

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            return hasPropertyValue( getProfile().SUB_CLASS_OF(), "SUB_CLASS_OF", cls );
        }
        else {
            // we want the direct, not general relationship
            // first try to find an inf graph that can do the work for us
            InfGraph ig = null;
            if (getGraph() instanceof InfGraph) {
                ig = (InfGraph) getGraph();
            }
            else if (getGraph() instanceof OntModel) {
                OntModel m = (OntModel) getGraph();
                if (m.getGraph() instanceof InfGraph) {
                    ig = (InfGraph) m.getGraph();
                }
            }


            if (ig != null && ig.getReasoner().supportsProperty( ReasonerVocabulary.directSubClassOf )) {
                // we can look this up directly
                return hasPropertyValue( ReasonerVocabulary.directSubClassOf, "direct sub-class", cls );
            }
            else {
                // otherwise, not an inf-graph or the given inf-graph does not support direct directly (:-)

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     * @param context an execution context giving access to other relevant data
     */
    @Override
    public void headAction(Node[] args, int length, RuleContext context) {
        boolean ok = false;
        InfGraph inf = context.getGraph();
        Graph raw = inf.getRawGraph();
        Graph deductions = inf.getDeductionsGraph();
        for (int i = 0; i < length; i++) {
            Node clauseN = getArg(i, args, context);
            if (Util.isNumeric(clauseN)) {
                int clauseIndex = Util.getIntValue(clauseN);
                Object clause = context.getRule().getBodyElement(clauseIndex);

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    /**
     * Shared implementation applicable to head or body
     */
    private void doHide(Node[] args, int length, RuleContext context ) {
        InfGraph g = context.getGraph();
        if (g instanceof FBRuleInfGraph) {
            for (int i = 0; i < length; i++) {
                ((FBRuleInfGraph)g).hideNode(args[i]);
            }
        } else {

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