transfer.java

一个用java写的开源的数据库系统

/* Copyrights and Licenses
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 * This product includes Hypersonic SQL.
 * Originally developed by Thomas Mueller and the Hypersonic SQL Group. 
 *
 * Copyright (c) 1995-2000 by the Hypersonic SQL Group. All rights reserved. 
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 *          product includes Hypersonic SQL." 
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 * For work added by the HSQL Development Group:
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 * All rights reserved.
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 * modification, are permitted provided that the following conditions are met:
 *
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 * list of conditions and the following disclaimer, including earlier
 * license statements (above) and comply with all above license conditions.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution, including earlier
 * license statements (above) and comply with all above license conditions.
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 * contributors may be used to endorse or promote products derived from this
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 */


package org.hsqldb.util;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.applet.*;
import java.util.*;
import java.sql.*;

// fredt@users 20011220 - patch 481239 by xponsard@users - enhancements
// enhancements to support saving and loading of transfer settings,
// transfer of blobs, and catalog and schema names in source db
// changes by fredt to allow saving and loading of transfer settings
// fredt@users 20020215 - patch 516309 by Nicolas Bazin - enhancements
// sqlbob@users 20020401 - patch 1.7.0 - reengineering
// nicolas BAZIN 20020430 - add Catalog selection, correct a bug preventing table
//    edition, change double quotes to simple quotes for default values of CHAR type

/**
 *  Utility program (or applet) for transferring tables between different
 *  databases via JDBC. Understands HSQLDB database particularly well.
 *
 * @version 1.7.0
 */
public class Transfer extends Applet
implements WindowListener, ActionListener, ItemListener, Traceable {

    Frame            fMain;
    Image            imgEmpty;
    DataAccessPoint  sourceDb;
    DataAccessPoint  targetDb;
    TransferTable    tCurrent;
    int              iMaxRows;
    int              iSelectionStep;
    Vector           tTable;
    java.awt.List    lTable;
    String           sSourceSchemas[];
    String           sSourceCatalog, sDestSchema, sDestCatalog;
    TextField tSourceTable, tDestTable, tDestDropIndex, tDestCreateIndex;
    TextField        tDestDrop, tDestCreate, tDestDelete, tDestAlter;
    TextField        tSourceSelect, tDestInsert;
    Checkbox         cTransfer, cDrop, cCreate, cDelete, cInsert, cAlter;
    Checkbox         cCreateIndex, cDropIndex;
    Checkbox         cFKForced, cIdxForced;
    Button           bStart, bContinue;
    TextField        tMessage;
    int              iTransferMode;
    static boolean   bMustExit;
    int              CurrentTransfer, CurrentAlter;
    final static int SELECT_SOURCE_CATALOG = 1;
    final static int SELECT_SOURCE_SCHEMA  = 2;
    final static int SELECT_DEST_CATALOG   = 3;
    final static int SELECT_DEST_SCHEMA    = 4;
    final static int SELECT_SOURCE_TABLES  = 5;
    final static int TRFM_TRANSFER         = 1;
    final static int TRFM_DUMP             = 2;
    final static int TRFM_RESTORE          = 3;

    /**
     * Method declaration
     *
     *
     * @param s
     */
    public void trace(String s) {

        if ((s != null) &&!s.equals("")) {
            tMessage.setText(s);

            if (TRACE) {
                System.out.println(s);
            }
        }
    }

    /**
     * Method declaration
     *
     */
    public void init() {

        Transfer m = new Transfer();

        m._main(null);
    }

    /**
     * Method declaration
     *
     */
    public static void work(String arg[]) {

        Transfer m = new Transfer();

        m._main(arg);
    }

    /**
     * Method declaration
     *
     *
     * @param arg
     */
    public static void main(String arg[]) {

        System.getProperties().put("sun.java2d.noddraw", "true");

        bMustExit = true;

        work(arg);
    }

    private boolean CatalogToSelect() {

        Vector result = null;

        try {
            lTable.removeAll();

            if (iSelectionStep == this.SELECT_SOURCE_CATALOG) {
                result = sourceDb.getCatalog();
            } else if (iSelectionStep == this.SELECT_DEST_CATALOG) {
                result = targetDb.getCatalog();
            } else {
                Exit();
            }

            if (result.size() > 1) {
                lTable.setMultipleMode(true);

                if (iSelectionStep == this.SELECT_SOURCE_CATALOG) {
                    bStart.setLabel("Select Catalog: Source");
                } else {
                    bStart.setLabel("Select Catalog: Destination");
                }

                bStart.invalidate();
                bStart.setEnabled(true);

                for (Enumeration e =
                        result.elements(); e.hasMoreElements(); ) {
                    lTable.add(e.nextElement().toString());
                }

                lTable.repaint();
                trace("Select correct Catalog");
            } else {
                if (result.size() == 1) {
                    if (iSelectionStep == this.SELECT_SOURCE_CATALOG) {
                        sSourceCatalog = (String) result.firstElement();
                        sSourceSchemas = null;
                    } else {
                        sDestCatalog = (String) result.firstElement();
                        sDestSchema  = null;
                    }
                } else {
                    if (iSelectionStep == this.SELECT_SOURCE_CATALOG) {
                        sSourceCatalog = null;
                        sSourceSchemas = null;
                    } else {
                        sDestCatalog = null;
                        sDestSchema  = null;
                    }
                }

                if ((iSelectionStep == this.SELECT_DEST_CATALOG)
                        && (sDestCatalog != null)) {
                    try {
                        targetDb.setCatalog(sDestCatalog);
                    } catch (Exception ex) {
                        trace("Catalog " + sSourceCatalog
                              + " could not be selected in the target database");

                        sSourceCatalog = null;
                    }
                }

                iSelectionStep++;

                ProcessNextStep();

                return false;
            }
        } catch (Exception exp) {
            lTable.removeAll();
            trace("Exception reading catalog: " + exp);
            exp.printStackTrace();
        }

        return (lTable.getItemCount() > 0);
    }

    private boolean SchemaToSelect() {

        Vector result = null;

        try {
            lTable.removeAll();

            if (iSelectionStep == this.SELECT_SOURCE_SCHEMA) {
                result = sourceDb.getSchemas();
            } else if (iSelectionStep == this.SELECT_DEST_SCHEMA) {
                result = targetDb.getSchemas();
            } else {
                Exit();
            }

            if (result.size() > 1) {
                lTable.setMultipleMode(true);

                if (iSelectionStep == this.SELECT_SOURCE_SCHEMA) {
                    bStart.setLabel("Select Schema: Source");
                } else {
                    bStart.setLabel("Select Schema: Destination");
                }

                bStart.invalidate();
                bStart.setEnabled(true);

                for (Enumeration e =
                        result.elements(); e.hasMoreElements(); ) {
                    lTable.add(e.nextElement().toString());
                }

                lTable.repaint();
                trace("Select correct Schema or load Settings file");
            } else {
                if (result.size() == 1) {
                    if (iSelectionStep == this.SELECT_SOURCE_SCHEMA) {
                        sSourceSchemas    = new String[1];
                        sSourceSchemas[0] = (String) result.firstElement();
                    } else {
                        sDestSchema = (String) result.firstElement();
                    }
                } else {
                    if (iSelectionStep == this.SELECT_SOURCE_SCHEMA) {
                        sSourceSchemas = null;
                    } else {
                        sDestSchema = null;
                    }
                }

                if (iTransferMode == TRFM_DUMP) {
                    iSelectionStep = this.SELECT_SOURCE_TABLES;
                } else {
                    iSelectionStep++;
                }

                ProcessNextStep();

                return false;
            }
        } catch (Exception exp) {
            lTable.removeAll();
            trace("Exception reading schemas: " + exp);
            exp.printStackTrace();
        }

        return (lTable.getItemCount() > 0);
    }

    /**
     * Method declaration
     *
     */
    void _main(String arg[]) {

        /*
        ** What function is asked from the transfer tool?
        */
        iTransferMode = TRFM_TRANSFER;

        if ((arg != null) && (arg.length > 0)) {
            if ((arg[0].toLowerCase().equals("-r"))
                    || (arg[0].toLowerCase().equals("--restore"))) {
                iTransferMode = TRFM_RESTORE;
            } else if ((arg[0].toLowerCase().equals("-d"))
                       || (arg[0].toLowerCase().equals("--dump"))) {
                iTransferMode = TRFM_DUMP;
            }
        }

        fMain = new Frame("HSQL Transfer Tool");
        imgEmpty = createImage(new MemoryImageSource(2, 2, new int[4 * 4], 2,
                2));

        fMain.setIconImage(imgEmpty);
        fMain.addWindowListener(this);
        fMain.setSize(640, 480);
        fMain.add("Center", this);

        MenuBar bar      = new MenuBar();
        String  extras[] = {
            "Insert 10 rows only", "Insert 1000 rows only", "Insert all rows",
            "-", "Load Settings...", "Save Settings...", "-", "Exit"
        };
        Menu menu = new Menu("Options");

        addMenuItems(menu, extras);
        bar.add(menu);
        fMain.setMenuBar(bar);
        initGUI();

        Dimension d    = Toolkit.getDefaultToolkit().getScreenSize();
        Dimension size = fMain.getSize();

        // (ulrivo): full size on screen with less than 640 width
        if (d.width >= 640) {
            fMain.setLocation((d.width - size.width) / 2,
                              (d.height - size.height) / 2);
        } else {
            fMain.setLocation(0, 0);
            fMain.setSize(d);
        }

        fMain.setVisible(true);

        CurrentTransfer = CurrentAlter = 0;

        try {
            if ((iTransferMode == TRFM_DUMP)
                    || (iTransferMode == TRFM_TRANSFER)) {
                sourceDb = new TransferDb(
                    ConnectionDialog.createConnection(
                        fMain, "Source Database"), this);

                if (!sourceDb.isConnected()) {
                    Exit();

                    return;
                }
            } else {
                FileDialog f = new FileDialog(fMain, "Restore FileName",
                                              FileDialog.LOAD);

                f.show();

                String sFileName = f.getFile();
                String Path      = f.getDirectory();

                if ((sFileName == null) || (sFileName.equals(""))) {
                    Exit();

                    return;
                } else {
                    sourceDb = new TransferSQLText(Path + sFileName, this);
                }
            }