HSQLDB example source code file (jdbcSavepoint.java)

This example HSQLDB source code file (jdbcSavepoint.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - HSQLDB tags/keywords

jdbc, savepoint, savepoint, sql, sqlexception, sqlexception, string, string

The HSQLDB jdbcSavepoint.java source code

/* Copyright (c) 2001-2008, 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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package org.hsqldb.jdbc;

import java.sql.SQLException;
import java.sql.Savepoint;

import org.hsqldb.Trace;

/**
 * The representation of a savepoint, which is a point within
 * the current transaction that can be referenced from the
 * <code>Connection.rollback method. When a transaction
 * is rolled back to a savepoint all changes made after that
 * savepoint are undone.
 * <p>
 * Savepoints can be either named or unnamed. Unnamed
 * savepoints
 * are identified by an ID generated by the underlying
 * data source.
 *
 *
 * <!-- start Release-specific documentation -->
 * <div class="ReleaseSpecificDocumentation">
 * <h3>HSQLDB-Specific Information: 

 *
 * As the SQL 2003 standard does not provide for unnamed savepoints,
 * this feature is not supported.<p>
 *
 * If the connection is autoCommit, setting savepoints has no effect as any
 * such savepoint is cleared upon the execution of the first transactional
 * statement. <p>

 * </div>
 * <!-- end release-specific documentation -->
 *
 *
 * @author boucherb@users
 * @since JDK 1.4, HSQLDB 1.7.2
 */
public class jdbcSavepoint implements Savepoint {

    String         name;
    jdbcConnection connection;

    jdbcSavepoint(String name, jdbcConnection conn) throws SQLException {

        if (name == null) {
            throw Util.sqlException(Trace.INVALID_JDBC_ARGUMENT,
                                    "name is null");
        }

        this.name  = name;
        connection = conn;
    }

    /**
     * Retrieves the generated ID for the savepoint
     * that this <code>Savepoint object represents.
     * @return the numeric ID of this savepoint
     * @exception SQLException if this is a named
     * savepoint
     * @since 1.4
     */
    public int getSavepointId() throws SQLException {
        throw Util.notSupported();
    }

    /**
     * Retrieves the name of the savepoint that this
     * <code>Savepoint object represents. 

     *
     * @return the name of this savepoint
     * @exception SQLException if this is an un-named
     * savepoint
     * @since 1.4
     */
    public String getSavepointName() throws SQLException {
        return name;
    }

    public String toString() {
        return super.toString() + "[name=" + name + "]";
    }
}