libjava/classpath/gnu/classpath/jdwp/event/BreakpointEvent.java

   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   /**
  67    * Constructs a new BreakpointEvent
  68    *
  69    * @param thread  thread in which event occurred
  70    * @param loc     location where breakpoint occurred
  71    */
  72   public BreakpointEvent(Thread thread, Location loc)
  73   {
  74     super(JdwpConstants.EventKind.BREAKPOINT);
  75     _thread = thread;
  76     _location = loc;
  77   }
  78
  79   /**
  80    * Returns a specific filtering parameter for this event.
  81    * Valid types are thread and location.
  82    *
  83    * @param type  the type of parameter desired
  84    * @returns the desired parameter or null
  85    */
  86   public Object getParameter(Class type)
  87   {
  88     if (type == ThreadId.class)
  89       return _thread;
  90     else if (type == Location.class)
  91       return _location;
  92
  93     return null;
  94   }
  95
  96   /**
  97    * Writes the event to the given stream
  98    *
  99    * @param outStream  the output stream to write the event to
 100    */
 101   protected void _writeData (DataOutputStream outStream)
 102     throws IOException
 103   {
 104     VMIdManager idm = VMIdManager.getDefault();
 105     ThreadId tid = (ThreadId) idm.getObjectId(_thread);
 106
 107     tid.write(outStream);
 108     _location.write(outStream);
 109   }
 110 }