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

com.hp.hpl.jena.reasoner.TriplePattern
Datastructure which defines a triple pattern as used in simple rules and in find interfaces.
Wildcards are recorded by using Node_RuleVariable entries rather than nulls because they can be named. If a null is specified that is converted to a variable of name "". Note that whilst some engines might simply require Node_Variables the forward engine requires variables represented using the more specialized subclass - Node_RuleVariable.

It would make more sense to have TriplePattern subclass Triple but that is final for some strange reason.

    public void testEquivalencesSimple() {
        TransitiveGraphCache cache = new TransitiveGraphCache(directP, closedP);
        cache.addRelation(new Triple(a, closedP, b));
        cache.addRelation(new Triple(b, closedP, a));
        TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(null, closedP, null)),
                new Object[] {
                new Triple(a, closedP, b),
                new Triple(b, closedP, a),
                new Triple(b, closedP, b),
                new Triple(a, closedP, a),
        });
        TestUtil.assertIteratorLength( cache.find(new TriplePattern(null, closedP, null)), 4);
    }

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        cache.addRelation(new Triple(d, closedP, c));
        
        cache.addRelation(new Triple(b, closedP, d));
        cache.addRelation(new Triple(d, closedP, b));


        assertTrue("Test eq", cache.contains(new TriplePattern(a, closedP, d)));
    }

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  private Triple makeSubOfSomeFact(ATermAppl t1, ATermAppl t2, ATermAppl t3) {
    return Triple.create(m_Names.get( t1 ), m_Names.get( t2 ), m_Names.get( t3 ));
  }
  
  private TriplePattern makeSubclassTriple(Node t1, Node t2) {
    return new TriplePattern(t1, PRED_SUB, t2);
  }

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  private TriplePattern makeSubOfSomeTriple(Node t1, ATermAppl p, Node t2) {
    return makeSubOfSomeTriple(t1, m_Names.get(p), t2);
  }
  
  private TriplePattern makeSubOfSomeTriple(Node t1, Node p, Node t2) {
    return new TriplePattern(t1, p, t2);
  }

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    ExtendedIterator<Triple> i = GraphQueryHandler.findTriple( kb, this, subject, predicate, object );


    // always look at asserted triples at the end
    if( finder != null ) {
      TriplePattern tp = new TriplePattern( subject, predicate, object );
      i = i.andThen( finder.find( tp ) );
    }


    // make sure we don't have duplicates
    return UniqueExtendedIterator.create( i );

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    ExtendedIterator<Triple> i = GraphQueryHandler.findTriple( kb, loader, subject, predicate, object );


    // always look at asserted triples at the end
    if( finder != null ) {
      TriplePattern tp = new TriplePattern( subject, predicate, object );
      i = i.andThen( finder.find( tp ) );
    }


    // make sure we don't have duplicates
    return UniqueExtendedIterator.create( i );

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  private Triple makeSubOfSomeFact(ATermAppl t1, ATermAppl t2, ATermAppl t3) {
    return Triple.create(m_Names.get( t1 ), m_Names.get( t2 ), m_Names.get( t3 ));
  }
  
  private TriplePattern makeSubclassTriple(Node t1, Node t2) {
    return new TriplePattern(t1, PRED_SUB, t2);
  }

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  private TriplePattern makeSubOfSomeTriple(Node t1, ATermAppl p, Node t2) {
    return makeSubOfSomeTriple(t1, m_Names.get(p), t2);
  }
  
  private TriplePattern makeSubOfSomeTriple(Node t1, Node p, Node t2) {
    return new TriplePattern(t1, p, t2);
  }

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        object = object.substring(1, object.length()-1);
      }
      classNode = Node_RuleVariable.createURI(object);
    }
    
    ClauseEntry clauseEntry = new TriplePattern(argumnetNode, Node_RuleVariable.createURI(RDF.type.getURI()), classNode);
    return new JenaClauseEntryImpl(clauseEntry, jenaVariableMap);
  }

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        predicate = predicate.substring(1, predicate.length()-1);
      }
      predicateNode = Node_RuleVariable.createURI(predicate);
    }
    
    ClauseEntry clauseEntry = new TriplePattern(subjectNode, predicateNode, objectNode);
    return new JenaClauseEntryImpl(clauseEntry, jenaVariableMap);
  }

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