old-autovect-branch/libjava/classpath/gnu/classpath/jdwp/event/ClassPrepareEvent.java

   1 /* ClassPrepareEvent.java -- An event specifying that a class has been
   2    prepared by the virtual machine
   3    Copyright (C) 2005 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.ReferenceTypeId;
  46 import gnu.classpath.jdwp.id.ThreadId;
  47 import gnu.classpath.jdwp.util.JdwpString;
  48 import gnu.classpath.jdwp.util.Signature;
  49
  50 import java.io.DataOutputStream;
  51 import java.io.IOException;
  52
  53 /**
  54  * "Notification of a class prepare in the target VM. See the JVM
  55  * specification for a definition of class preparation. Class prepare
  56  * events are not generated for primtiive classes (for example,
  57  * <code>java.lang.Integer.TYPE</code>)." -- JDWP 1.4.2
  58  *
  59  * @author Keith Seitz  (keiths@redhat.com)
  60  */
  61 public class ClassPrepareEvent
  62   extends Event
  63 {
  64   // The thread in which this event occurred
  65   private Thread _thread;
  66
  67   // The class that was prepared
  68   private Class _class;
  69
  70   // Prepare flags
  71   private int _status;
  72
  73   /**
  74    * Class has been verified
  75    */
  76   public static final int STATUS_VERIFIED
  77       = JdwpConstants.ClassStatus.VERIFIED;
  78
  79   /**
  80    * Class has been prepared
  81    */
  82   public static final int STATUS_PREPARED
  83       = JdwpConstants.ClassStatus.PREPARED;
  84
  85   /**
  86    * Class has been initialized
  87    */
  88   public static final int STATUS_INITIALIZED
  89       = JdwpConstants.ClassStatus.INITIALIZED;
  90
  91   /**
  92    * Error preparing class
  93    */
  94   public static final int STATUS_ERROR
  95       = JdwpConstants.ClassStatus.ERROR;
  96
  97   /**
  98    * Constructs a new <code>ClassPrepareEvent</code>
  99    *
 100    * @param thread  thread in which event occurred
 101    * @param clazz   class which was prepared
 102    * @param flags   prepare status flags
 103    */
 104   public ClassPrepareEvent (Thread thread, Class clazz, int flags)
 105   {
 106     super (JdwpConstants.EventKind.CLASS_PREPARE);
 107     _thread = thread;
 108     _class = clazz;
 109     _status = flags;
 110   }
 111
 112   /**
 113    * Returns a specific filtering parameter for this event.
 114    * Valid types are thread and class.
 115    *
 116    * @param type  the type of parameter desired
 117    * @returns the desired parameter or <code>null</code>
 118    */
 119   public Object getParameter (Class type)
 120   {
 121     if (type == ThreadId.class)
 122       return _thread;
 123     else if (type == ReferenceTypeId.class)
 124       return _class;
 125
 126     return null;
 127   }
 128
 129   /**
 130    * Writes the event to the given stream
 131    *
 132    * @param outStream  the output stream to write the event to
 133    */
 134   protected void _writeData (DataOutputStream outStream)
 135     throws IOException
 136   {
 137     VMIdManager idm = VMIdManager.getDefault();
 138     ThreadId tid = (ThreadId) idm.getObjectId (_thread);
 139     ReferenceTypeId rid = idm.getReferenceTypeId (_class);
 140
 141     tid.write (outStream);
 142     rid.writeTagged (outStream);
 143     JdwpString.writeString (outStream,
 144                             Signature.computeClassSignature (_class));
 145     outStream.writeInt (_status);
 146   }
 147 }