Examples of com.hp.hpl.jena.util.FileManager

com.hp.hpl.jena.util.FileManager
FileManager A FileManager provides access to named file-like resources by opening InputStreams to things in the filing system, by URL (http: and file:) and found by the classloader. It can also load RDF data from such a system resource into an existing model or create a new (Memory-based) model. There is a global FileManager which provide uniform access to system resources: applications may also create specialised FileManagers. A FileManager contains a list of location functions to try: the global FileManger has one {@link LocatorFile}, one {@link LocatorClassLoader} andone {@link LocatorURL}Main operations: *
- loadModel, readModel : URI to model
- open, openNoMap : URI to input stream
- mapURI : map URI to another by {@link LocationMapper}
Utilities:
- readWholeFileAsUTF8
- optional caching of models
A FileManager works in conjunction with a LocationMapper. A {@link LocationMapper} is a set of alternative locations for systemresources and a set of alternative prefix locations. For example, a local copy of a common RDF dataset may be used whenever the usual URL is used by the application. The {@link LocatorFile} also supports the idea of "current directory". @see LocationMapper @see FileUtils

        closeInputStream(in) ;
    }


    public void testFileManagerLocatorZipNonFound()
    {
        FileManager fileManager = new FileManager() ;
        try {
            fileManager.addLocatorZip(zipname) ;
        } catch (Exception ex)
        { fail("Failed to create a filemanager and add a zip locator") ; }
        try {
            InputStream in = fileManager.open(filenameNonExistent) ;
            closeInputStream(in) ;
            assertNull("Found non-existant zip file member", in) ;
        } catch (NotFoundException ex) {}
    }

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        } catch (NotFoundException ex) {}
    }
    
    public void testFileManagerClone()
    {
        FileManager fileManager1 = new FileManager() ;
        FileManager fileManager2 = fileManager1.clone() ;
        
        // Should not affect fileManager2
        fileManager1.addLocatorFile() ;
        {
            InputStream in = fileManager1.open(testingDir+"/"+filename) ;
            assertNotNull(in) ;
            closeInputStream(in) ;
        }
        // Should not work.
        try {
            InputStream in = fileManager2.open(testingDir+"/"+filename) ;
            closeInputStream(in) ;
            assertNull("Found file via wrong FileManager", in) ;
        } catch (NotFoundException ex) {}
    }

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    }
    
    public void testLocationMappingURLtoFileOpen()
    {
        LocationMapper locMap = new LocationMapper(TestLocationMapper.mapping) ;
        FileManager fileManager = new FileManager(locMap) ;
        fileManager.addLocatorFile() ;
        InputStream in = fileManager.open("http://example.org/file") ;
        assertNotNull(in) ;
        closeInputStream(in) ;
    }

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    }


    public void testLocationMappingURLtoFileOpenNotFound()
    {
        LocationMapper locMap = new LocationMapper(TestLocationMapper.mapping) ;
        FileManager fileManager = new FileManager(locMap) ;
        fileManager.addLocatorClassLoader(fileManager.getClass().getClassLoader()) ;
        try {
            InputStream in = fileManager.open("http://example.org/file") ;
            closeInputStream(in) ;
            assertNull("Found nont-existant URL", null) ;
        } catch (NotFoundException ex) {}
    }

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        } catch (NotFoundException ex) {}
    }


    public void testCache1()
    {
        FileManager fileManager = new FileManager() ;
        fileManager.addLocatorFile(testingDir) ;
        Model m1 = fileManager.loadModel(fileModel) ;
        Model m2 = fileManager.loadModel(fileModel) ;
        assertNotSame(m1, m2) ;
    }

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        assertNotSame(m1, m2) ;
    }
    
    public void testCache2()
    {
        FileManager fileManager = FileManager.get() ;
        fileManager.addLocatorFile(testingDir) ;
        fileManager.setModelCaching(true) ;
        Model m1 = fileManager.loadModel(fileModel) ;
        Model m2 = fileManager.loadModel(fileModel) ;
        assertSame(m1, m2) ;
    }

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        assertSame(m1, m2) ;
    }
    
    public void testCache3()
    {
        FileManager fileManager = FileManager.get() ;
        fileManager.addLocatorFile(testingDir) ;
        fileManager.setModelCaching(true) ;
        Model m1 = fileManager.loadModel(fileModel) ;
        Model m2 = fileManager.loadModel(fileModel) ;
        assertSame(m1, m2) ;
        
        fileManager.removeCacheModel(fileModel) ;
        Model m3 = fileManager.loadModel(fileModel) ;
        assertNotSame(m1, m3) ;
        
        fileManager.resetCache() ;
        Model m4 = fileManager.loadModel(fileModel) ;
        Model m5 = fileManager.loadModel(fileModel) ;


        assertSame(m4, m5) ;
        assertNotSame(m1, m4) ;
        assertNotSame(m3, m4) ;
    }

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    public void testFollowOwlImports()
        {
        final Model modelToLoad = model( "this hasMarker B5" );
        Model  m = model( "x ja:reasoner y; _x owl:imports eh:/loadMe" );
        FileManager fm = new FixedFileManager().add( "eh:/loadMe", modelToLoad ); 
        Model m2 = new ImportManager().withImports( fm, m );
        assertInstanceOf( MultiUnion.class, m2.getGraph() );
        assertIsoModels( modelToLoad.union( m ), m2 );
        }

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    public void testFollowJAImports()
        {
        final Model modelToLoad = model( "this hasMarker B5" );
        Model  m = model( "x ja:reasoner y; _x ja:imports eh:/loadMe" );
        FileManager fm = new FixedFileManager().add( "eh:/loadMe", modelToLoad ); 
        Model m2 = new ImportManager().withImports( fm, m );
        assertInstanceOf( MultiUnion.class, m2.getGraph() );
        assertIsoModels( modelToLoad.union( m ), m2 );
        }

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    public void testImportMayBeLiteral()
        {
        final Model modelToLoad = model( "this hasMarker B5" );
        Model  m = model( "x ja:reasoner y; _x ja:imports 'eh:/loadMe'" );
        FileManager fm = new FixedFileManager().add( "eh:/loadMe", modelToLoad ); 
        Model m2 = new ImportManager().withImports( fm, m );
        assertInstanceOf( MultiUnion.class, m2.getGraph() );
        assertIsoModels( modelToLoad.union( m ), m2 );
        }

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