datasource.java

sun公司的petstore,一个J2ee的示例应用程序.

                            result = new Integer(-1);
                        }
                        break;
                    case 1:
                        result = order.getUserId();
                        break;
                    case 2:
                        result = order.getDate();
                        break;
                    case 3:
                        result = new Float(order.getAmount());
                        break;
                    case 4:
                        result = order.getStatus();
                        break;
                    default:
                        System.err.println("This shouldn't happen: (" + column
                        + ").  Defaulting to null value");
                }
                return result;
            }

            public Class getColumnClass(int column) {
                Class result = Object.class;
                switch (column) {
                    case 0:
                        result = Integer.class;
                        break;
                    case 1:
                        result = String.class;
                        break;
                    case 2:
                        result = Date.class;
                        break;
                    case 3:
                        result = Float.class;
                        break;
                    case 4:
                        result = String.class;
                        break;
                    default:
                        System.err.println("This shouldn't happen: (" + column
                        + ").  Defaulting to Object.class");
                }
                return result;
            }

            public int getRowCount() {
                if (indexMapping != null) {
                    return indexMapping.length;
                }
                return 0;
            }

            /**
             * Do not allow setting of data in view mode.
             */
            public boolean isCellEditable(int row, int column) {
                return false;
            }
        }

        /**
         * This class is used to modify orders with the status of PENDING.  The new
         * status of the orders can either be APPROVED or DENIED.  These changes
         * will then be send back to the server, or cached until a network
         * connection is available.
         */
        protected class OrdersApproveTableModel extends OrdersViewTableModel {
            public OrdersApproveTableModel() {
                super();
                statusList = new String[] { PetStoreProxy.Order.PENDING };
            }

            public void commit() {
                Vector approvedRows = new Vector();
                Vector deniedRows = new Vector();
                for (int i = 0; i < getRowCount(); i++) {
                    if (PetStoreProxy.Order.APPROVED.equals(
                    (String)getValueAt(i, 4))) {
                        approvedRows.add(new Integer(i));
                    } else if (PetStoreProxy.Order.DENIED.equals(
                    (String)getValueAt(i, 4))) {
                        deniedRows.add(new Integer(i));
                    }
                }

                // Return if we don't have anything to update.
                if (approvedRows.size() == 0 &&
                deniedRows.size() == 0) {
                    return;
                }

                final PetStoreProxy.Order[] approvedOrders =
                new PetStoreProxy.Order[approvedRows.size()];
                int row;
                for (int i = 0; i < approvedRows.size(); i++) {
                    row = ((Integer)approvedRows.elementAt(i)).intValue();
                    approvedOrders[i] = orders[indexMapping[row]];
                }

                final PetStoreProxy.Order[] deniedOrders =
                new PetStoreProxy.Order[deniedRows.size()];
                for (int i = 0; i < deniedRows.size(); i++) {
                    row = ((Integer)deniedRows.elementAt(i)).intValue();
                    deniedOrders[i] = orders[indexMapping[row]];
                }

                ServerAction action = new ServerAction() {
                    public void actionPerformed(final ActionEvent action) {
                        // Notify listener to disable actions.
                        pcs.firePropertyChange(DISABLE_ACTIONS, null, null);

                        StatusBar.getInstance().setMessage(
                        PetStoreAdminClient.getString("Status.update"));
                        super.actionPerformed(action);
                    }

                    protected Object request(ActionEvent e) {
                        if (approvedOrders.length > 0) {
                            server.updateStatus(approvedOrders,
                            PetStoreProxy.Order.APPROVED);
                        }
                        if (deniedOrders.length > 0) {
                            server.updateStatus(deniedOrders,
                            PetStoreProxy.Order.DENIED);
                        }
                        return getServerOrderData();
                    }

                    protected void response(Object requestValue) {
                        orders = (PetStoreProxy.Order[])requestValue;

                        if (ordersViewTableModel != null) {
                            ordersViewTableModel.updateModel();
                        }
                        if (ordersApproveTableModel != null) {
                            ordersApproveTableModel.updateModel();
                        }
                        StatusBar.getInstance().setMessage(null);
                        // Notify listener to enable actions.
                        pcs.firePropertyChange(ENABLE_ACTIONS, null, null);
                    }

                    protected void handleException(Exception e) {
                        e.printStackTrace();
                        fatalServerError(e.getMessage());
                    }
                };
                action.actionPerformed(null);
            }

            public boolean isCellEditable(int row, int column) {
                // Only the status column is editable.
                boolean result = false;
                if (column == 4) {
                    result = true;
                }
                return result;
            }

            public void setValueAt(Object value, final int row, int column) {
                final PetStoreProxy.Order order = orders[indexMapping[row]];
                final String val = (String)value;

                // Update the order manually since we don't want to refresh
                // all the data.
                orders[indexMapping[row]] = new PetStoreProxy.Order(
                order.getId(), order.getUserId(), order.getDate(),
                order.getAmount(), val);
                fireTableRowsUpdated(row, row);
            }
        }

        public abstract class ChartModel {
            /** The default start date is 1/12/2001 for the demo. TODO In the
             * released application this should default to the present day. */
            private Date startDate = new Date("1/1/2001");

            /** The default end date is the present day. */
            private Date endDate = new Date("12/31/2002");

            /** The default view mode is the top level view. */
            private String viewMode = null;

            protected String keys[];
            protected PetStoreProxy.Sales[] sales;

            public ChartModel() {
            }

            public String[] getKeys() {
                if (sales == null) {
                    return null;
                }
                if (keys == null) {
                    keys = new String[sales.length];
                    for (int i = 0; i < keys.length; i++) {
                        keys[i] = sales[i].getKey();
                    }
                }
                return keys;
            }

            /**
             * Returns the revenue associated with a particular category.
             */
            public float getOrders(String category) {
                if (sales == null) {
                    return 0f;
                }

                float result = 0f;
                for (int i = 0; i < sales.length; i++) {
                    if (sales[i].getKey().equals(category)) {
                        result = sales[i].getOrders();
                    }
                }
                return result;
            }

            /**
             * Returns the revenue associated with a particular category.
             */
            public float getRevenue(String category) {
                if (sales == null) {
                    return 0f;
                }

                float result = 0f;
                for (int i = 0; i < sales.length; i++) {
                    if (sales[i].getKey().equals(category)) {
                        result = sales[i].getRevenue();
                    }
                }
                return result;
            }

            /**
             * Returns the current category we are using for the view mode.  If the
             * returned value is null we are using the top level view.
             */
            public String getViewMode() {
                return viewMode;
            }

            public Date getStartDate() {
                return (Date)startDate.clone();
            }

            public Date getEndDate() {
                return (Date)endDate.clone();
            }

            public void setDates(Date startDate, Date endDate) {
                this.startDate = startDate;
                this.endDate = endDate;

                new RefreshChartAction(this).actionPerformed(null);
            }

            private class RefreshChartAction extends ServerAction {
                private ChartModel chartModel;

                public RefreshChartAction(ChartModel chartModel) {
                    this.chartModel = chartModel;
                }

                public void actionPerformed(final ActionEvent action) {
                    // Notify listener to disable actions.
                    pcs.firePropertyChange(DISABLE_ACTIONS, null, null);

                    StatusBar.getInstance().setMessage(
                    PetStoreAdminClient.getString("Status.retrieve"));
                    super.actionPerformed(action);
                }

                protected Object request(ActionEvent e) {
                    return getServerChartData();
                }

                protected void response(Object requestValue) {
                    if (chartModel instanceof PieChartModel) {
                        pieChartSales = (PetStoreProxy.Sales[])requestValue;
                    } else if (chartModel instanceof BarChartModel) {
                        barChartSales = (PetStoreProxy.Sales[])requestValue;
                    }
                    updateModel();
                    StatusBar.getInstance().setMessage(null);
                    // Notify listener to enable actions.
                    pcs.firePropertyChange(ENABLE_ACTIONS, null, null);
                }

                protected void handleException(Exception e) {
                    e.printStackTrace();
                    fatalServerError(e.getMessage());
                }
            }

            protected abstract PetStoreProxy.Sales[] getServerChartData();
            protected abstract void updateModel();
        }

        public class PieChartModel extends ChartModel {
            public PieChartModel() {
                super();
            }

            protected PetStoreProxy.Sales[] getServerChartData() {
                return getServerPieChartData();
            }

            protected void updateModel() {
                // Update the reference to the sales array.
                sales = pieChartSales;

                // Reset the keys to null.
                keys = null;

                // Notify listeners that the pie chart data has changed.
                pcs.firePropertyChange(PIE_CHART_DATA_CHANGED, null, null);
            }
        }

        public class BarChartModel extends ChartModel {
            public BarChartModel() {
                super();
            }

            protected PetStoreProxy.Sales[] getServerChartData() {
                return getServerBarChartData();
            }

            protected void updateModel() {
                // Update the reference to the sales array.
                sales = barChartSales;

                // Reset the keys to null.
                keys = null;

                // Notify listeners that the bar chart data has changed.
                pcs.firePropertyChange(BAR_CHART_DATA_CHANGED, null, null);
            }
        }
}