JDBCMeta.java Source code

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Here is the source code for JDBCMeta.java

Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * 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.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.SQLException;

/**
 * A database MetaData query
 * 
 * @version $Id: JDBCMeta.java,v 1.7 2004/03/09 04:27:42 ian Exp $
 */
public class JDBCMeta {

    public static void main(String[] av) {
        int i;
        try {
            // Load the driver
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

            // Enable logging
            // DriverManager.setLogStream(System.err);

            System.out.println("Getting Connection");
            Connection conn = DriverManager.getConnection("jdbc:odbc:Companies", "ian", ""); // user, passwd

            // Get a Database MetaData as a way of interrogating
            // the names of the tables in this database.
            DatabaseMetaData meta = conn.getMetaData();

            System.out.println("We are using " + meta.getDatabaseProductName());
            System.out.println("Version is " + meta.getDatabaseProductVersion());

            int txisolation = meta.getDefaultTransactionIsolation();
            System.out.println("Database default transaction isolation is " + txisolation + " ("
                    + transactionIsolationToString(txisolation) + ").");

            conn.close();

            System.out.println("All done!");

        } catch (ClassNotFoundException e) {
            System.out.println("Can't load driver " + e);
        } catch (SQLException ex) {
            System.out.println("Database access failed:");
            System.out.println(ex);
        }
    }

    /**
     * Convert a TransactionIsolation int (defined in java.sql.Connection) to
     * the corresponding printable string.
     */
    public static String transactionIsolationToString(int txisolation) {
        switch (txisolation) {
        case Connection.TRANSACTION_NONE:
            // transactions not supported.
            return "TRANSACTION_NONE";
        case Connection.TRANSACTION_READ_UNCOMMITTED:
            // All three phenomena can occur
            return "TRANSACTION_NONE";
        case Connection.TRANSACTION_READ_COMMITTED:
            // Dirty reads are prevented; non-repeatable reads and
            // phantom reads can occur.
            return "TRANSACTION_READ_COMMITTED";
        case Connection.TRANSACTION_REPEATABLE_READ:
            // Dirty reads and non-repeatable reads are prevented;
            // phantom reads can occur.
            return "TRANSACTION_REPEATABLE_READ";
        case Connection.TRANSACTION_SERIALIZABLE:
            // All three phenomena prvented; slowest!
            return "TRANSACTION_SERIALIZABLE";
        default:
            throw new IllegalArgumentException(txisolation + " not a valid TX_ISOLATION");
        }
    }
}