dbcloudscape.java

torque服务器源代码

package org.apache.torque.adapter;

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 *
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 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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import java.sql.Connection;
import java.sql.SQLException;
import java.util.StringTokenizer;

/**
 * This is used to connect to Cloudscape SQL databases.
 *
 * @author <a href="mailto:[e-mail]">David Sean Taylor</a>
 * @version $Id: DBCloudscape.java,v 1.5 2002/09/20 14:17:50 mpoeschl Exp $
 */
public class DBCloudscape extends DB
{
    /** qualifier */
    private static final String QUALIFIER = ".";

    /**
     * Constructor.
     */
    protected DBCloudscape()
    {
    }
    /**
     * This method is used to ignore case.
     *
     * @param in The string to transform to upper case.
     * @return The upper case string.
     */
    public String toUpperCase(String in)
    {
        return in;
    }

    /**
     * This method is used to ignore case.
     *
     * @param in The string whose case to ignore.
     * @return The string in a case that can be ignored.
     */
    public String ignoreCase(String in)
    {
        return in;
    }

    /**
     * @see org.apache.torque.adapter.DB#getIDMethodType()
     */
    public String getIDMethodType()
    {
        return AUTO_INCREMENT;
    }

    /**
     * @see org.apache.torque.adapter.DB#getIDMethodSQL(Object obj)
     */
    public String getIDMethodSQL(Object obj)
    {
        StringBuffer sql = new StringBuffer(132);
        sql.append("select distinct ConnectionInfo.lastAutoincrementValue(");

        String qualifiedIdentifier = (String) obj;

        StringTokenizer tokenizer = new StringTokenizer(qualifiedIdentifier,
                QUALIFIER);
        int count = tokenizer.countTokens();

        String schema, table, column;

        System.out.println("qi = " + qualifiedIdentifier);
        // no qualifiers, its simply a column name
        switch (count)
        {
        case 0:
            return ""; // not valid -- we need the column name and table name
        case 1:
            return ""; // not valid -- we need the table name to select from

        case 2:
            table = tokenizer.nextToken();
            column = tokenizer.nextToken();
            sql.append("'APP', '");
            sql.append(table);
            break;

        case 3:
            schema = tokenizer.nextToken();
            table = tokenizer.nextToken();
            column = tokenizer.nextToken();
            sql.append("'");
            sql.append(schema);
            sql.append("', '");
            sql.append(table);
            break;

        default:
            return ""; // not valid
        }

        sql.append("', '");
        sql.append(column);
        sql.append("') FROM ");
        sql.append(table);

        System.out.println(sql.toString());
        return sql.toString();
    }

    /**
     * Locks the specified table.
     *
     * @param con The JDBC connection to use.
     * @param table The name of the table to lock.
     * @exception SQLException No Statement could be created or executed.
     */
    public void lockTable(Connection con, String table) throws SQLException
    {
    }

    /**
     * Unlocks the specified table.
     *
     * @param con The JDBC connection to use.
     * @param table The name of the table to unlock.
     * @exception SQLException No Statement could be created or executed.
     */
    public void unlockTable(Connection con, String table) throws SQLException
    {
    }
}