/*

 * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.sql;

import java.sql.SQLException;

/**

 * <P>An {@code Event} object that provides information about the

 * source of a connection-related event.  {@code ConnectionEvent}

 * objects are generated when an application closes a pooled connection

 * and when an error occurs.  The {@code ConnectionEvent} object

 * contains two kinds of information:

 * <UL>

 *   <LI>The pooled connection closed by the application

 *   <LI>In the case of an error event, the {@code SQLException}

 *       about to be thrown to the application

 * </UL>

 *

 * @since 1.4

 */

public class ConnectionEvent extends java.util.EventObject {

  /**

   * <P>Constructs a {@code ConnectionEvent} object initialized with

   * the given {@code PooledConnection} object. {@code SQLException}

   * defaults to {@code null}.

   *

   * @param con the pooled connection that is the source of the event

   * @throws IllegalArgumentException if {@code con} is null.

   */

  public ConnectionEvent(PooledConnection con) {

    super(con);

  }

  /**

   * <P>Constructs a {@code ConnectionEvent} object initialized with

   * the given {@code PooledConnection} object and

   * {@code SQLException} object.

   *

   * @param con the pooled connection that is the source of the event

   * @param ex the SQLException about to be thrown to the application

   * @throws IllegalArgumentException if {@code con} is null.

   */

  public ConnectionEvent(PooledConnection con, SQLException ex) {

    super(con);

    this.ex = ex;

  }

  /**

   * <P>Retrieves the {@code SQLException} for this

   * {@code ConnectionEvent} object. May be {@code null}.

   *

   * @return the SQLException about to be thrown or {@code null}

   */

  public SQLException getSQLException() { return ex; }

  /**

   * The {@code SQLException} that the driver will throw to the

   * application when an error occurs and the pooled connection is no

   * longer usable.

   * @serial

   */

  private SQLException ex = null;

  /**

   * Private serial version unique ID to ensure serialization

   * compatibility.

   */

  static final long serialVersionUID = -4843217645290030002L;

 }