Examples of com.hp.hpl.jena.graph.impl.FileGraph

com.hp.hpl.jena.graph.impl.FileGraph
A FileGraph is a memory-based graph that is optionally read in from a file when it is created, and is written back when it is closed. It supports (weak) transactions by using checkpoint files.

    public void testTransactionCommitThenAbort()
        {
        Graph initial = graphWith( "A pings B; B pings C" );
        Graph extra = graphWith( "C pingedBy B; fileGraph rdf:type Graph" );
        File foo = FileUtils.tempFileName( "fileGraph", ".nt" );
        Graph g = new FileGraph( foo, true, true );
        g.getTransactionHandler().begin();
        GraphUtil.addInto( g, initial );
        g.getTransactionHandler().commit();
        g.getTransactionHandler().begin();
        GraphUtil.addInto( g, extra );
        g.getTransactionHandler().abort();
        assertIsomorphic( initial, g );
        Model inFile = ModelFactory.createDefaultModel();
        inFile.read( "file:///" + foo, "N-TRIPLES" );
        assertIsomorphic( initial, inFile.getGraph() );
        }

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            @Override
            public void notifyClosed( File f )
                { history.add( f ); }
            };
        File file = FileUtils.tempFileName( "fileGraph", ".nt" );
        Graph g = new FileGraph( n, file, true, true );
        assertEquals( new ArrayList<File>(), history );
        g.close();
        assertEquals( oneElementList( file ), history );
        }

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        @Override
        public void runTest()
            {
            File foo = FileUtils.tempFileName( prefix, suffix );
            Graph original = graphWith( content );
            Graph g = new FileGraph( foo, true, true );
            GraphUtil.addInto( g, original );
            g.close();
            Graph g2 = new FileGraph( foo, false, true );
            assertIsomorphic( original, g2 );
            g2.close();
            }

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        {
        FileModelAssembler a = new FileModelAssembler();
        File x = FileUtils.tempFileName( "fileModelAssembler", ".n3" );
        Model m = a.createFileModel( x, "N3", true, false);
        assertInstanceOf( FileGraph.class, m.getGraph() );
        FileGraph fg = (FileGraph) m.getGraph();
        assertEquals( x, fg.name );
        }

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com.hp.hpl.jena.assembler.assemblers.FileModelAssembler

com.hp.hpl.jena.assembler.test.TestFileModelAssembler

com.hp.hpl.jena.graph.test.TestFileGraph

com.hp.hpl.jena.graph.test.TestFileGraph$Case

com.hp.hpl.jena.graph.test.TestFileGraphMaker

com.hp.hpl.jena.rdf.model.impl.ModelCom

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