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/* BreakpointEvent.java -- An event specifying that the interpreter

   has hit a breakpoint

   Copyright (C) 2006 Free Software Foundation

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath 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 for more details.

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

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.classpath.jdwp.event;

import gnu.classpath.jdwp.JdwpConstants;

import gnu.classpath.jdwp.VMIdManager;

import gnu.classpath.jdwp.id.ThreadId;

import gnu.classpath.jdwp.util.Location;

import java.io.DataOutputStream;

import java.io.IOException;

/**

 * "Notification of a breakpoint in the target VM. The breakpoint event is

 * generated before the code at its location is executed."

 *

 * @author Keith Seitz  (keiths@redhat.com)

 */

public class BreakpointEvent

  extends Event

{

  // The thread in which this event occurred

  private Thread _thread;

  // Location where breakpoint occurred

  private Location _location;

  //object instance

  private Object _instance;

  /**

   * Constructs a new BreakpointEvent

   *

   * @param thread  thread in which event occurred

   * @param loc     location where breakpoint occurred

   * @param instance object instance

   */

  public BreakpointEvent(Thread thread, Location loc, Object instance)

  {

    super(JdwpConstants.EventKind.BREAKPOINT);

    _thread = thread;

    _location = loc;

    _instance = instance;

  }

  /**

   * Returns a specific filtering parameter for this event.

   * Valid types are thread and location.

   *

   * @param type  the type of parameter desired

   * @returns the desired parameter or null

   */

  public Object getParameter(int type)

  {

    if (type == EVENT_THREAD)

      return _thread;

    else if (type == EVENT_LOCATION)

      return _location;

    else if (type == EVENT_INSTANCE)

      return _instance;

    return null;

  }

  /**

   * Writes the event to the given stream

   *

   * @param outStream  the output stream to write the event to

   */

  protected void _writeData (DataOutputStream outStream)

    throws IOException

  {

    VMIdManager idm = VMIdManager.getDefault();

    ThreadId tid = (ThreadId) idm.getObjectId(_thread);

    tid.write(outStream);

    _location.write(outStream);

  }

}