Entire row's content added to each individual cell

[elsheepo]

Background
After refactoring all of the database access code to DBController.java the TableView no longer displays correctly. Initially I had a connect() inside Controller.java which connected to database, ran several queries, and formatted the Tabs/TableViews. Here is the code for that method.

    private void connect() {
        StringBuilder dbUrl = new StringBuilder("jdbc:sqlite:");
        if (dbUrlTxt.getText().isEmpty()) {
            new Alert(Alert.AlertType.ERROR, "Database url must be specified.").showAndWait();
        } else {
            try {
                connection = getConnection(dbUrl.append(dbUrlTxt.getText()).toString());
            } catch (SQLException e) {
                e.printStackTrace();
            }
            String tableQuery = "SELECT * FROM sqlite_master WHERE type='table' ORDER BY name";
            try (PreparedStatement tableQueryPS = connection.prepareStatement(tableQuery)) {
                ResultSet tableNames = tableQueryPS.executeQuery();

                while (tableNames.next()) {

                    Tab tab = new Tab(tableNames.getString("name"));
                    tabPane.getTabs().add(tab);

                    TableView<ObservableList> tableView = new TableView<>();
                    tab.setContent(tableView);

                    String dataQuery = "SELECT * from " + tableNames.getString("name");
                    ResultSet tableValues = connection.createStatement().executeQuery(dataQuery);

                    for (int i = 0; i < tableValues.getMetaData().getColumnCount(); i++) {
                        final int j = i;
                        int dataValue = tableValues.getMetaData().getColumnType(i + 1);
                        // I need to use some generics here on the TableColumn to get rid of the Unchecked call to setCellValueFactory()
                        TableColumn tableColumn = new TableColumn(tableValues.getMetaData().getColumnName(i + 1));
                        if (dataValue == 4) {
                            tableColumn.setCellValueFactory((Callback<TableColumn.CellDataFeatures<ObservableList, Integer>, ObservableValue<String>>) param ->
                                    new SimpleStringProperty(param.getValue().get(j).toString()));
                        } else if (dataValue == 7) {
                            tableColumn.setCellValueFactory((Callback<TableColumn.CellDataFeatures<ObservableList, Double>, ObservableValue<String>>) param ->
                                    new SimpleStringProperty(param.getValue().get(j).toString()));
                        } else if (dataValue == 12) {
                            tableColumn.setCellValueFactory((Callback<TableColumn.CellDataFeatures<ObservableList, String>, ObservableValue<String>>) param ->
                                    new SimpleStringProperty(param.getValue().get(j).toString()));
                        }
                        tableView.getColumns().addAll(tableColumn);
                    }

                    ObservableList<ObservableList> data = FXCollections.observableArrayList();

                    while (tableValues.next()) {
                        ObservableList<String> row = FXCollections.observableArrayList();
                        for (int i = 1; i <= tableValues.getMetaData().getColumnCount(); i++) {
                            row.add(tableValues.getString(i));
                        }
                        data.add(row);
                    }
                    tableValues.close();
                    tableView.getItems().addAll(data);
                }
                tableNames.close();

            } catch (SQLException tableQueryException) {
                System.err.println(tableQueryException.toString());
            }
            connectBtn.setDisable(true);
            disconnectBtn.setDisable(false);
            addBtn.setDisable(false);
            updateBtn.setDisable(false);
            deleteBtn.setDisable(false);
            saveBtn.setDisable(false);
        }
    }

This method generated the expected results.
Expected Results

After refactoring, I get these results
Results

I have been stuck on this for several weeks now. Any help would be immensely appreciated.