protected KeyedGraph<V, E> prepareGraph() throws SQLException {
        LOGGER.info("Loading graph into memory...");
        final long start = System.currentTimeMillis();
        // Initialize the graph.
        KeyedGraph<V, E> graph;
        if (!globalOrientation.equals(GraphFunctionParser.Orientation.UNDIRECTED)) {
            if (weightColumn != null) {
                graph = new DirectedWeightedPseudoG<V, E>(vertexClass, edgeClass);
            } else {
                graph = new DirectedPseudoG<V, E>(vertexClass, edgeClass);
            }
        } else {
            if (weightColumn != null) {
                graph = new WeightedPseudoG<V, E>(vertexClass, edgeClass);
            } else {
                graph = new PseudoG<V, E>(vertexClass, edgeClass);
            }
        }
        final Statement st = connection.createStatement();
        final ResultSet edges = st.executeQuery("SELECT * FROM " +
                TableUtilities.parseInputTable(connection, inputTable));
        // Initialize the indices.
        initIndices(edges);
        try {
            // Add the edges.
            while (edges.next()) {
                loadEdge(graph, edges);
            }
            logTime(LOGGER, start);
            return graph;
        } catch (SQLException e) {
            LOGGER.error("Could not store edges in graph.", e);
            return null;
        } finally {
            edges.close();
            st.close();
        }
    }
protected KeyedGraph < V , E > prepareGraph ( ) throws SQLException { LOGGER . info ( "Loading graph into memory..." ) ; final long start = System . currentTimeMillis ( ) ; KeyedGraph < V , E > graph ; if ( ! globalOrientation . equals ( GraphFunctionParser . Orientation . UNDIRECTED ) ) { if ( weightColumn != null ) { graph = new DirectedWeightedPseudoG < V , E > ( vertexClass , edgeClass ) ; } else { graph = new DirectedPseudoG < V , E > ( vertexClass , edgeClass ) ; } } else { if ( weightColumn != null ) { graph = new WeightedPseudoG < V , E > ( vertexClass , edgeClass ) ; } else { graph = new PseudoG < V , E > ( vertexClass , edgeClass ) ; } } final Statement st = connection . createStatement ( ) ; final ResultSet edges = st . executeQuery ( "SELECT * FROM " + TableUtilities . parseInputTable ( connection , inputTable ) ) ; initIndices ( edges ) ; try { while ( edges . next ( ) ) { loadEdge ( graph , edges ) ; } logTime ( LOGGER , start ) ; return graph ; } catch ( SQLException e ) { LOGGER . error ( "Could not store edges in graph." , e ) ; return null ; } finally { edges . close ( ) ; st . close ( ) ; } }
Prepares a graph.

@return The newly prepared graph, or null if the graph could not
be created

@throws java.sql.SQLException