Examples of com.hp.hpl.jena.sdb.Store

com.hp.hpl.jena.sdb.Store
A Store is one RDF dataset instance - it is the unit of query. The Store class is the SDB specific mechanisms need to implement an RDF Dataset. DatasetStore provide the dataset interface. A store consists of a number of handlers for different aspects of the process of setting up and querying a database-backed Store. This means Store for new databases can be assmelbed from those standard components that work, with database-specific code only where necessary. A common case if the formatting of the database - this is often DB-specific yet SQL generation of query is more standard.

 
public class ExModelSDB
{
    static public void main(String...argv)
    {
        Store store = StoreFactory.create("sdb.ttl") ;
        Model model = SDBFactory.connectDefaultModel(store) ;
        
        StmtIterator sIter = model.listStatements() ;
        for ( ; sIter.hasNext() ; )
        {
            Statement stmt = sIter.nextStatement() ;
            System.out.println(stmt) ;
        }
        sIter.close() ;
        store.close() ;
    }

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    {
        Query query = QueryFactory.create(queryString) ;


        SDBConnection conn = new SDBConnection(jdbcConnection) ;
        
        Store store = StoreFactory.create(storeDesc, conn) ;
        
        Dataset ds = DatasetStore.create(store) ;
        QueryExecution qe = QueryExecutionFactory.create(query, ds) ;
        try {
            ResultSet rs = qe.execSelect() ;
            ResultSetFormatter.out(rs) ;
        } finally { qe.close() ; }
        // Does not close the JDBC connection.
        // Do not call : store.getConnection().close() , which does close the underlying connection.
        store.close() ;
    }

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        // Passing null for user and password causes them to be extracted
        // from the environment variables SDB_USER and SDB_PASSWORD
        SDBConnection conn = new SDBConnection(jdbcURL, null, null) ; 


        // Make store from connection and store description. 
        Store store = SDBFactory.connectStore(conn, storeDesc) ;
        
        Dataset ds = DatasetStore.create(store) ;
        QueryExecution qe = QueryExecutionFactory.create(query, ds) ;
        try {
            ResultSet rs = qe.execSelect() ;
            ResultSetFormatter.out(rs) ;
        } finally { qe.close() ; }
        store.close() ;
    }

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{
    static public void main(String...argv)
    {
        String queryString = "SELECT * { ?s ?p ?o }" ;
        Query query = QueryFactory.create(queryString) ;
        Store store = SDBFactory.connectStore("sdb.ttl") ;
        
        // Must be a DatasetStore to trigger the SDB query engine.
        // Creating a graph from the Store, and adding it to a general
        // purpose dataset will not necesarily exploit full SQL generation.
        // The right answers will be obtained but slowly.
        
        Dataset ds = DatasetStore.create(store) ;
        QueryExecution qe = QueryExecutionFactory.create(query, ds) ;
        try {
            ResultSet rs = qe.execSelect() ;
            ResultSetFormatter.out(rs) ;
        } finally { qe.close() ; }
        
        // Close the SDB conenction which also closes the underlying JDBC connection.
        store.getConnection().close() ;
        store.close() ;
    }

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    /** 
     * Create a store, based on the store description and connection.
     */
    public static Store create(StoreDesc desc, SDBConnection sdb)
    {
        Store store = _create(sdb, desc) ;
        return store ;
    }

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        if ( cmdTruncate )  cmdError("Tuple truncate - not implemented (yet)", true) ;
    }


    private void execPrint(String tableName)
    {
        Store store = getStore() ;
        TupleTable table = null ;
        if ( tableName.equalsIgnoreCase(store.getNodeTableDesc().getTableName()))
        {
            // A hack.
            // Need to chage SQLBridge to work on Node tables directly (no special build of value getters)
            TableDesc desc = new TableDesc(tableName, store.getNodeTableDesc().getNodeRefColName()) ; 
            table = new TupleTable(store, desc) ;
        }
        else
            table = new TupleTable(store, tableName) ;
        divider() ;

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    }


    private void execLoad(String tableName)
    {
        cmdError("Tuple load - not implemented (yet)", true) ;
        Store store = getStore() ;


        TupleTable table = null ;
        if ( tableName.equalsIgnoreCase(store.getNodeTableDesc().getTableName()))
            cmdError("Can't load the node table as a tupole table" );
        else
            table = new TupleTable(store, tableName) ;
    }

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    }
    
    @Override
    protected void execCmd(List<String> args)
    {
        Store store = getModStore().getStore() ;
        if ( ! modConfig.format() && 
             ! modConfig.createStore() &&
             ! modConfig.dropIndexes() && 
             ! modConfig.addIndexes() )
        {

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    /** 
     * Create a store, based on the store description and connection.
     */
    public static Store create(StoreDesc desc, SDBConnection sdb)
    {
        Store store = _create(sdb, desc) ;
        return store ;
    }

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        String path = null;
        path = mConfiguration.getRDFDatabaseURL();


        LOG.debug("The RDF repository: " + path);


        Store store = SDBFactory.connectStore(path);
        if (store != null)
        {
            LOG.debug("Connection to the SDB store... Ok");
        }
        return store;

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