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.

                
        /** Return an list of variables or nodes in a ClauseEntry, in flattened order */
        private List<Node> termVars(ClauseEntry term) {
            List<Node> result = new ArrayList<Node>();
            if (term instanceof TriplePattern) {
                TriplePattern goal = (TriplePattern)term;
                result.add(goal.getSubject());
                result.add(goal.getPredicate());
                Node obj = goal.getObject();
                if (Functor.isFunctor(obj)) {
                    result.add(obj);
                    result.addAll(termVars((Functor)obj.getLiteralValue()));
                } else {
                    result.add(obj);

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    /**
     * Helper - returns the (singleton) value for the given property on the given
     * root node in the data graph.
     */
    public static Node getPropValue(Node root, Node prop, Finder context) {
        return doGetPropValue(context.find(new TriplePattern(root, prop, null)));
    }

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    }
            
    public void doBasicTest(TransitiveGraphCache cache) {
         // Test forward property patterns
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, directP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, closedP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(a, closedP, c),
                new Triple(a, closedP, e),
                new Triple(a, closedP, f),
                new Triple(a, closedP, g)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, closedP, g)),
            new Object[] {
                new Triple(a, closedP, g),
            });
            
        // Test backward patterns
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(null, directP, f)),
            new Object[] {
                new Triple(e, closedP, f),
                new Triple(f, closedP, f),
                new Triple(c, closedP, f)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(null, closedP, f)),
            new Object[] {
                new Triple(f, closedP, f),
                new Triple(e, closedP, f),
                new Triple(b, closedP, f),
                new Triple(c, closedP, f),
                new Triple(a, closedP, f),
                new Triple(d, closedP, f)
            });
        
        // List all cases
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(null, directP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(d, closedP, d),
                new Triple(d, closedP, b),
                new Triple(b, closedP, b),
                new Triple(b, closedP, e),
                new Triple(b, closedP, c),
                new Triple(e, closedP, e),
                new Triple(e, closedP, f),
                new Triple(c, closedP, c),
                new Triple(c, closedP, f),
                new Triple(f, closedP, f),
                new Triple(f, closedP, g),
                new Triple(g, closedP, g)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(null, closedP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(a, closedP, c),
                new Triple(a, closedP, e),
                new Triple(a, closedP, f),
                new Triple(a, closedP, g),
                new Triple(d, closedP, d),
                new Triple(d, closedP, b),
                new Triple(d, closedP, e),
                new Triple(d, closedP, c),
                new Triple(d, closedP, f),
                new Triple(d, closedP, g),
                new Triple(b, closedP, b),
                new Triple(b, closedP, e),
                new Triple(b, closedP, c),
                new Triple(b, closedP, f),
                new Triple(b, closedP, g),
                new Triple(e, closedP, e),
                new Triple(e, closedP, f),
                new Triple(e, closedP, g),
                new Triple(c, closedP, c),
                new Triple(c, closedP, f),
                new Triple(c, closedP, g),
                new Triple(f, closedP, f),
                new Triple(f, closedP, g),
                new Triple(g, closedP, g)
             });
        
        // Add a look in the graph and check the loop from each starting position
        cache.addRelation(new Triple(g, closedP, e));
        
        TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(e, directP, null)),
                new Object[] {
                    new Triple(e, closedP, e),
                    new Triple(e, closedP, f),
                    new Triple(e, closedP, g)
                });
            TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(f, directP, null)),
                new Object[] {
                    new Triple(f, closedP, f),
                    new Triple(f, closedP, g),
                    new Triple(f, closedP, e)
                });
            TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(g, directP, null)),
                new Object[] {
                    new Triple(g, closedP, g),
                    new Triple(g, closedP, e),
                    new Triple(g, closedP, f)
                });
            TestUtil.assertIteratorValues(this, 
                    cache.find(new TriplePattern(null, directP, e)),
                    new Object[] {
                        new Triple(e, closedP, e),
                        new Triple(f, closedP, e),
                        new Triple(b, closedP, e),
                        new Triple(c, closedP, e),
                        new Triple(g, closedP, e)
                    });
                TestUtil.assertIteratorValues(this, 
                    cache.find(new TriplePattern(null, directP, f)),
                    new Object[] {
                        new Triple(f, closedP, f),
                        new Triple(g, closedP, f),
                        new Triple(b, closedP, f),
                        new Triple(c, closedP, f),
                        new Triple(e, closedP, f)
                    });
                TestUtil.assertIteratorValues(this, 
                    cache.find(new TriplePattern(null, directP, g)),
                    new Object[] {
                        new Triple(g, closedP, g),
                        new Triple(e, closedP, g),
                        new Triple(b, closedP, g),
                        new Triple(c, closedP, g),
                        new Triple(f, closedP, g)
                    });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(g, closedP, null)),
            new Object[] {
                new Triple(g, closedP, g),
                new Triple(g, closedP, e),
                new Triple(g, closedP, f)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(e, closedP, null)),
            new Object[] {
                new Triple(e, closedP, g),
                new Triple(e, closedP, e),
                new Triple(e, closedP, f)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(f, closedP, null)),
            new Object[] {
                new Triple(f, closedP, g),
                new Triple(f, closedP, e),
                new Triple(f, closedP, f)
            });

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        cache.addRelation(new Triple(a, closedP, b));  
        cache.addRelation(new Triple(c, closedP, a));        
        cache.addRelation(new Triple(c, closedP, b));
        cache.addRelation(new Triple(a, closedP, c));     
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, directP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(a, closedP, c),
            });

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

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        cache.addRelation(new Triple(a, closedP, c));
        cache.addRelation(new Triple(b, closedP, d));
        cache.addRelation(new Triple(c, closedP, d));
        cache.addRelation(new Triple(d, closedP, e));
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, closedP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(a, closedP, b),
                new Triple(a, closedP, c),
                new Triple(a, closedP, d),
                new Triple(a, closedP, e)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(b, closedP, null)),
            new Object[] {
                new Triple(b, closedP, b),
                new Triple(b, closedP, d),
                new Triple(b, closedP, e)
            });
        cache.removeRelation(new Triple(b, closedP, d));
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, closedP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(a, closedP, b),
                new Triple(a, closedP, c),
                new Triple(a, closedP, d),
                new Triple(a, closedP, e)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(b, closedP, null)),
            new Object[] {
                new Triple(b, closedP, b),
            });
        cache.removeRelation(new Triple(a, closedP, c));
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, closedP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b)
            });
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(b, closedP, null)),
            new Object[] {
                new Triple(b, closedP, b),
            });
    }

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        cache.addRelation(new Triple(a, closedP, b));
        cache.addRelation(new Triple(c, closedP, d));
        cache.addRelation(new Triple(a, closedP, d));
        cache.addRelation(new Triple(b, closedP, c));
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, directP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
            });
    }

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        cache.addRelation(new Triple(a, closedP, b));
        cache.addRelation(new Triple(b, closedP, c));
        cache.addRelation(new Triple(a, closedP, c));
        cache.addRelation(new Triple(c, closedP, b));
        TestUtil.assertIteratorValues(this, 
            cache.find(new TriplePattern(a, directP, null)),
            new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(a, closedP, c),
            });

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        cache.addRelation(new Triple(d, closedP, c));
        cache.addRelation(new Triple(d, closedP, e));
        cache.addRelation(new Triple(c, closedP, e));
        cache.addRelation(new Triple(c, closedP, b));
        TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(c, directP, null)),
                new Object[] {
                    new Triple(c, closedP, e),
                    new Triple(c, closedP, g),
                    new Triple(c, closedP, b),
                    new Triple(c, closedP, d),
                    new Triple(c, closedP, c),
                });
        TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(null, directP, c)),
                new Object[] {
                    new Triple(a, closedP, c),
                    new Triple(b, closedP, c),
                    new Triple(d, closedP, c),
                    new Triple(f, closedP, c),
                    new Triple(c, closedP, c),
                });
        TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(f, closedP, null)),
                new Object[] {
                    new Triple(f, closedP, f),
                    new Triple(f, closedP, b),
                    new Triple(f, closedP, c),
                    new Triple(f, closedP, d),

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        cache.addRelation(new Triple(e, closedP, f));
        cache.addRelation(new Triple(f, closedP, d));
        cache.addRelation(new Triple(b, closedP, d));
        cache.addRelation(new Triple(f, closedP, c));
        TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(a, directP, null)),
                new Object[] {
                new Triple(a, closedP, a),
                new Triple(a, closedP, b),
                new Triple(a, closedP, c),
                new Triple(a, closedP, d),
                new Triple(a, closedP, e),
                new Triple(a, closedP, f),
                });
        TestUtil.assertIteratorValues(this, 
                cache.find(new TriplePattern(null, directP, a)),
                new Object[] {
                new Triple(a, closedP, a),
                new Triple(b, closedP, a),
                new Triple(c, closedP, a),
                new Triple(d, closedP, a),

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