hsqldbtransferhelper.java

hsqldb是100％java实现的数据库,是一个开放源代码的JAVA数据库 l 具有标准的SQL语法和JAVA接口 l HSQLDB可以自由使用和分发 l 非常简洁和快速的

/* Copyright (c) 2001-2005, 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.
 *
 * 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.
 *
 * 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;
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.util;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Types;

// sqlbob@users 20020325 - patch 1.7.0 - reengineering

/**
 * Conversions to / from Hsqldb
 *
 * @author sqlbob@users
 * @version 1.7.0
 */
class HsqldbTransferHelper extends TransferHelper {

    public HsqldbTransferHelper() {
        super();
    }

    public HsqldbTransferHelper(TransferDb database, Traceable t, String q) {
        super(database, t, q);
    }

    int convertFromType(int type) {

        if (type == 100) {
            type = Types.VARCHAR;

            tracer.trace("Converted HSQLDB VARCHAR_IGNORECASE to VARCHAR");
        }

        return (type);
    }

    String fixupColumnDefRead(TransferTable t, ResultSetMetaData meta,
                              String columnType, ResultSet columnDesc,
                              int columnIndex) throws SQLException {

        String CompareString = "INTEGER IDENTITY";

        if (columnType.indexOf(CompareString) >= 0) {

            // We just found a increment
            columnType = "SERIAL";
        }

        return (columnType);
    }

    String fixupColumnDefWrite(TransferTable t, ResultSetMetaData meta,
                               String columnType, ResultSet columnDesc,
                               int columnIndex) throws SQLException {

        if (columnType.indexOf("SERIAL") >= 0) {
            columnType = " INTEGER IDENTITY ";
        }

        return (columnType);
    }

    String fixupColumnDefRead(String aTableName, ResultSetMetaData meta,
                              String columnType, ResultSet columnDesc,
                              int columnIndex) throws SQLException {
        return fixupColumnDefRead((TransferTable) null, meta, columnType,
                                  columnDesc, columnIndex);
    }

    String fixupColumnDefWrite(String aTableName, ResultSetMetaData meta,
                               String columnType, ResultSet columnDesc,
                               int columnIndex) throws SQLException {
        return fixupColumnDefWrite((TransferTable) null, meta, columnType,
                                   columnDesc, columnIndex);
    }

    String formatName(String t) {
        return formatIdentifier(t);
    }
}