/*
 * Copyright 1998-1999 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package com.sun.jdi.event;

import com.sun.jdi.*;
import com.sun.jdi.request.EventRequest;

/**
 * An occurrence in a target VM that is of interest to a debugger. Event is
 * the common superinterface for all events (examples include
 * {@link BreakpointEvent}, {@link ExceptionEvent},
 * {@link ClassPrepareEvent}).
 * When an event occurs, an instance of Event as a component of
 * an {@link EventSet} is enqueued in the
 * {@link VirtualMachine}'s {@link EventQueue}.
 *
 * @see EventSet
 * @see EventQueue
 *
 * @author Robert Field
 * @since  1.3
 */
public interface Event extends Mirror {

    /**
     * @return The {@link EventRequest} that requested this event.
     * Some events (eg. {@link VMDeathEvent}) may not have
     * a cooresponding request and thus will return null.
     */
    EventRequest request();
}