Source for gnu.classpath.jdwp.event.BreakpointEvent

   1: /* BreakpointEvent.java -- An event specifying that the interpreter
   2:    has hit a breakpoint
   3:    Copyright (C) 2006 Free Software Foundation
   4: 
   5: This file is part of GNU Classpath.
   6: 
   7: GNU Classpath is free software; you can redistribute it and/or modify
   8: it under the terms of the GNU General Public License as published by
   9: the Free Software Foundation; either version 2, or (at your option)
  10: any later version.
  11: 
  12: GNU Classpath is distributed in the hope that it will be useful, but
  13: WITHOUT ANY WARRANTY; without even the implied warranty of
  14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15: General Public License for more details.
  16: 
  17: You should have received a copy of the GNU General Public License
  18: along with GNU Classpath; see the file COPYING.  If not, write to the
  19: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20: 02110-1301 USA.
  21: 
  22: Linking this library statically or dynamically with other modules is
  23: making a combined work based on this library.  Thus, the terms and
  24: conditions of the GNU General Public License cover the whole
  25: combination.
  26: 
  27: As a special exception, the copyright holders of this library give you
  28: permission to link this library with independent modules to produce an
  29: executable, regardless of the license terms of these independent
  30: modules, and to copy and distribute the resulting executable under
  31: terms of your choice, provided that you also meet, for each linked
  32: terms of your choice, provided that you also meet, for each linked
  33: independent module, the terms and conditions of the license of that
  34: module.  An independent module is a module which is not derived from
  35: or based on this library.  If you modify this library, you may extend
  36: this exception to your version of the library, but you are not
  37: obligated to do so.  If you do not wish to do so, delete this
  38: exception statement from your version. */
  39: 
  40: 
  41: package gnu.classpath.jdwp.event;
  42: 
  43: import gnu.classpath.jdwp.JdwpConstants;
  44: import gnu.classpath.jdwp.VMIdManager;
  45: import gnu.classpath.jdwp.id.ThreadId;
  46: import gnu.classpath.jdwp.util.Location;
  47: 
  48: import java.io.DataOutputStream;
  49: import java.io.IOException;
  50: 
  51: /**
  52:  * "Notification of a breakpoint in the target VM. The breakpoint event is
  53:  * generated before the code at its location is executed."
  54:  *
  55:  * @author Keith Seitz  (keiths@redhat.com)
  56:  */
  57: public class BreakpointEvent
  58:   extends Event
  59: {
  60:   // The thread in which this event occurred
  61:   private Thread _thread;
  62: 
  63:   // Location where breakpoint occurred
  64:   private Location _location;
  65: 
  66:   //object instance
  67:   private Object _instance;
  68: 
  69:   /**
  70:    * Constructs a new BreakpointEvent
  71:    *
  72:    * @param thread  thread in which event occurred
  73:    * @param loc     location where breakpoint occurred
  74:    * @param instance object instance
  75:    */
  76:   public BreakpointEvent(Thread thread, Location loc, Object instance)
  77:   {
  78:     super(JdwpConstants.EventKind.BREAKPOINT);
  79:     _thread = thread;
  80:     _location = loc;
  81:     _instance = instance;
  82:   }
  83: 
  84:   /**
  85:    * Returns a specific filtering parameter for this event.
  86:    * Valid types are thread and location.
  87:    *
  88:    * @param type  the type of parameter desired
  89:    * @returns the desired parameter or null
  90:    */
  91:   public Object getParameter(int type)
  92:   {
  93:     if (type == EVENT_THREAD)
  94:       return _thread;
  95:     else if (type == EVENT_LOCATION)
  96:       return _location;
  97:     else if (type == EVENT_INSTANCE)
  98:       return _instance;
  99: 
 100:     return null;
 101:   }
 102: 
 103:   /**
 104:    * Writes the event to the given stream
 105:    *
 106:    * @param outStream  the output stream to write the event to
 107:    */
 108:   protected void _writeData (DataOutputStream outStream)
 109:     throws IOException
 110:   {
 111:     VMIdManager idm = VMIdManager.getDefault();
 112:     ThreadId tid = (ThreadId) idm.getObjectId(_thread);
 113: 
 114:     tid.write(outStream);
 115:     _location.write(outStream);
 116:   }
 117: }