transfertable.java

一个用java写的开源的数据库系统

/* Copyrights and Licenses
 *
 * 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. 
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met: 
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 *         and the following disclaimer. 
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 *         conditions and the following disclaimer in the documentation and/or other materials
 *         provided with the distribution. 
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 *        following acknowledgment: "This product includes Hypersonic SQL." 
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 *        "Hypersonic SQL" appear in their names without prior written permission of the
 *         Hypersonic SQL Group. 
 *     -  Redistributions of any form whatsoever must retain the following acknowledgment: "This
 *          product includes Hypersonic SQL." 
 * This software is provided "as is" and any expressed or implied warranties, including, but
 * not limited to, the implied warranties of merchantability and fitness for a particular purpose are
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 * direct, indirect, incidental, special, exemplary, or consequential damages (including, but
 * not limited to, procurement of substitute goods or services; loss of use, data, or profits;
 * or business interruption). However caused any on any theory of liability, whether in contract,
 * strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this
 * software, even if advised of the possibility of such damage. 
 * This software consists of voluntary contributions made by many individuals on behalf of the
 * Hypersonic SQL Group.
 *
 *
 * For work added by the HSQL Development Group:
 *
 * Copyright (c) 2001-2002, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * 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.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG, 
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.util;

import java.sql.*;
import java.util.*;
import java.io.Serializable;

// 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 20020325 - patch 1.7.0 - reengineering

/**
 * Transfers data from one database to another
 *
 * @version 1.7.0
 */
class TransferTable implements Serializable {

    Hashtable       hTypes;
    DataAccessPoint sourceDb;
    DataAccessPoint destDb;
    SQLStatements   Stmts = null;
    Traceable       tracer;

    TransferTable(DataAccessPoint src, String name, String schema,
                  String type, Traceable t) {

        Stmts         = new SQLStatements();
        sourceDb      = src;
        Stmts.sSchema = "";

        if (schema != null && schema.length() > 0) {
            Stmts.sSchema = schema;
        }

        Stmts.sType              = type;
        Stmts.sDatabaseToConvert = src.databaseToConvert;
        Stmts.sSourceTable       = Stmts.sDestTable = name;
        tracer                   = t;

        if (Stmts.sType.compareTo("TABLE") == 0) {
            Stmts.sSourceSelect = "SELECT * FROM "
                                  + src.helper.formatName(Stmts.sSourceTable)
                                  + ";";
        } else if (Stmts.sType.compareTo("VIEW") == 0) {
            Stmts.sSourceSelect = "";
        }
    }

    void setDest(String _Schema, DataAccessPoint dest) throws Exception {

        destDb = dest;

        dest.helper.setSchema(_Schema);
    }

    /**
     * extractTableStructure
     *
     * @param Source
     * @param Destination
     * @throws Exception
     */
    void extractTableStructure(DataAccessPoint Source,
                               DataAccessPoint Destination) throws Exception {
        initTypes();
        Source.getTableStructure(this, Destination);
    }

    /**
     * Method declaration
     *
     *
     * @param t
     *
     * @throws SQLException
     */
    void transferStructure() throws Exception {

        String Statement = new String("");

        if (destDb.helper.needTransferTransaction()) {
            try {
                destDb.setAutoCommit(false);
            } catch (Exception e) {}
        }

        if (Stmts.bTransfer == false) {
            tracer.trace("Table " + Stmts.sSourceTable + " not transfered");

            return;
        }

        tracer.trace("Table " + Stmts.sSourceTable + ": start transfer");

        try {
            if (Stmts.bDropIndex) {
                if (Stmts.sDestDropIndex.charAt(Stmts.sDestDropIndex.length()
                                                - 1) != ';') {
                    Stmts.sDestDropIndex += ";";
                }

                int lastsemicolon = 0;
                int nextsemicolon = Stmts.sDestDropIndex.indexOf(';');

                while (nextsemicolon > lastsemicolon) {
                    Statement = Stmts.sDestDropIndex.substring(lastsemicolon,
                            nextsemicolon);

                    while (Statement.charAt(Statement.length() - 1) == ';') {
                        Statement = Statement.substring(0, Statement.length()
                                                        - 1);
                    }

                    try {
                        tracer.trace("Executing " + Statement);
                        destDb.execute(Statement);
                    } catch (Exception e) {
                        tracer.trace("Ignoring error " + e.getMessage());
                    }

                    lastsemicolon = nextsemicolon + 1;
                    nextsemicolon = lastsemicolon
                                    + Stmts.sDestDropIndex.substring(
                                        lastsemicolon).indexOf(';');
                }
            }

            if (Stmts.bDelete) {
                if (Stmts.sDestDelete.charAt(Stmts.sDestDelete.length() - 1)
                        != ';') {
                    Stmts.sDestDelete += ";";
                }

                int lastsemicolon = 0;
                int nextsemicolon = Stmts.sDestDelete.indexOf(';');

                while (nextsemicolon > lastsemicolon) {
                    Statement = Stmts.sDestDelete.substring(lastsemicolon,
                            nextsemicolon);

                    while (Statement.charAt(Statement.length() - 1) == ';') {
                        Statement = Statement.substring(0, Statement.length()
                                                        - 1);
                    }

                    try {
                        tracer.trace("Executing " + Statement);
                        destDb.execute(Statement);
                    } catch (Exception e) {
                        tracer.trace("Ignoring error " + e.getMessage());
                    }

                    lastsemicolon = nextsemicolon + 1;
                    nextsemicolon = lastsemicolon
                                    + Stmts.sDestDelete.substring(
                                        lastsemicolon).indexOf(';');
                }
            }

            if (Stmts.bDrop) {
                if (Stmts.sDestDrop.charAt(Stmts.sDestDrop.length() - 1)
                        != ';') {
                    Stmts.sDestDrop += ";";
                }

                int lastsemicolon = 0;
                int nextsemicolon = Stmts.sDestDrop.indexOf(';');

                while (nextsemicolon > lastsemicolon) {
                    Statement = Stmts.sDestDrop.substring(lastsemicolon,
                                                          nextsemicolon);