Examples of org.apache.clerezza.rdf.core.Graph

org.apache.clerezza.rdf.core.Graph
A graph, modeled as a set of triples. This interface does not extend java.util.Set because of the different identity constraints, i.e. two Graphs may be equal (isomorphic) even if the set of triples are not. Implementations MUST be immutable and throw respective exceptions, when add/remove-methods are called. @see org.apache.clerezza.rdf.core.impl.AbstractGraph @author reto

        //      because an equals check will not work with BNodes. 
        Set<UriRef> graphNames = new HashSet<UriRef>();
        for( Iterator<Triple> iterator = graphNameIndex.getMGraph().iterator(); iterator.hasNext(); ) {
            Triple triple = iterator.next();
            UriRef graphName = new UriRef(triple.getSubject().toString());
            Graph currentGraph = getModelGraph(graphName, false, false).getGraph();
            if(graph.equals(currentGraph)){
                graphNames.add(graphName);
            }
        }
        return graphNames;

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        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
        MGraph mGraph = getMGraph(tcDir);
        mGraph.addAll(triples);
        Graph result = mGraph.getGraph();
        
        graphMap.put(name, result);
        return result;
    }

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    public void testCreateGraph() {
        TcProvider simpleTcmProvider = getInstance();
        MGraph mGraph = new SimpleMGraph();
        mGraph.add(new TripleImpl(uriRefA, uriRefA, uriRefA));


        Graph createdGraph = simpleTcmProvider.createGraph(uriRefA, mGraph);


        Iterator<Triple> iteratorInput = mGraph.iterator();
        Iterator<Triple> iteratorCreated = createdGraph.iterator();
        assertEquals(iteratorInput.next(), iteratorCreated.next());
        assertFalse(iteratorCreated.hasNext());


        try {
            simpleTcmProvider.createGraph(uriRefA, mGraph);

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        simpleTcmProvider.createGraph(uriRefB, mGraph);
        mGraph = new SimpleMGraph();
        mGraph.add(new TripleImpl(uriRefB1, uriRefB1, uriRefB1));
        simpleTcmProvider.createGraph(uriRefB1, mGraph);


        Graph bGraph = simpleTcmProvider.getGraph(uriRefB);
        Iterator<Triple> iterator = bGraph.iterator();
        assertEquals(new TripleImpl(uriRefB, uriRefB, uriRefB), iterator.next());
        assertFalse(iterator.hasNext());
    }

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    @Test
    public void testDeleteEntity() {
        TcProvider simpleTcmProvider = getInstance();
        MGraph mGraph = new SimpleMGraph();
        mGraph.add(new TripleImpl(uriRefA, uriRefA, uriRefA));
        Graph graph = mGraph.getGraph();
        simpleTcmProvider.createGraph(uriRefA, graph);
        simpleTcmProvider.createGraph(uriRefC, graph);


        simpleTcmProvider.deleteTripleCollection(uriRefA);
        try {
            simpleTcmProvider.getGraph(uriRefA);
            assertTrue(false);
        } catch (NoSuchEntityException e) {
            assertTrue(true);
        }


        // Check that graph is still available under uriRefC
        Graph cGraph = simpleTcmProvider.getGraph(uriRefC);
        assertNotNull(cGraph);
    }

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        graph = provider.getMGraph(graphUriRef);
        assertNotNull(graph);
        //check that there is no such graph, but only the mgraph
        boolean expThrown = false;
        try {
            Graph g = provider.getGraph(graphUriRef);
        } catch(NoSuchEntityException e) {
            expThrown = true;
        }


        assertTrue(expThrown);

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    @Test
    public void testCreateGraphExtended() throws Exception {


        TcProvider provider = getInstance();
        Graph graph = provider.createGraph(graphUriRef, null);


        assertNotNull(graph);


        //get a new provider and check that graph is there
        provider = getInstance();

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    @Test
    public void testCreateGraphNoDuplicateNames() throws Exception {


        TcProvider provider = getInstance();
        Graph graph = provider.createGraph(graphUriRef, null);
        assertNotNull(graph);
        boolean expThrown = false;
        try {
            Graph other = provider.createGraph(otherGraphUriRef, null);
        } catch(EntityAlreadyExistsException eaee) {
            expThrown = true;
        }
        assertTrue(expThrown);
    }

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        Triple t1 = createTestTriple();


        TcProvider provider = getInstance();


        Graph graph = provider.createGraph(graphUriRef, createTestTripleCollection(t1));


        assertEquals(1, graph.size());
        assertTrue(graph.contains(t1));
    }

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        Set<Triple> t = new HashSet<Triple>();
        t.add(t1);


        TcProvider provider = getInstance();


        Graph graph = provider.createGraph(graphUriRef, createTestTripleCollection(t1));


        boolean expThrown = false;


        try {
            graph.add(t1);
        } catch(UnsupportedOperationException uoe) {
            expThrown = true;
        }


        assertTrue(expThrown);
        expThrown = false;


        try {
            graph.remove(t1);
        } catch(UnsupportedOperationException uoe) {
            expThrown = true;
        }


        assertTrue(expThrown);
        expThrown = false;


        try {
            graph.addAll(t);
        } catch(UnsupportedOperationException uoe) {
            expThrown = true;
        }


        assertTrue(expThrown);


        expThrown = false;


        try {
            graph.clear();
        } catch(UnsupportedOperationException uoe) {
            expThrown = true;
        }


        assertTrue(expThrown);


        expThrown = false;


        try {
            graph.removeAll(t);
        } catch(UnsupportedOperationException uoe) {
            expThrown = true;
        }


        assertTrue(expThrown);

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