Source for gnu.classpath.jdwp.processor.ClassLoaderReferenceCommandSet

   1: /* ClassLoaderReferenceCommandSet.java -- class to implement the
   2:    ClassLoaderReference Command Set
   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.processor;
  42: 
  43: import gnu.classpath.jdwp.JdwpConstants;
  44: import gnu.classpath.jdwp.VMVirtualMachine;
  45: import gnu.classpath.jdwp.exception.JdwpException;
  46: import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
  47: import gnu.classpath.jdwp.exception.NotImplementedException;
  48: import gnu.classpath.jdwp.id.ObjectId;
  49: import gnu.classpath.jdwp.id.ReferenceTypeId;
  50: 
  51: import java.io.DataOutputStream;
  52: import java.io.IOException;
  53: import java.nio.ByteBuffer;
  54: import java.util.ArrayList;
  55: import java.util.Iterator;
  56: 
  57: /**
  58:  * A class representing the ClassLoaderReference Command Set.
  59:  *
  60:  * @author Aaron Luchko <aluchko@redhat.com>
  61:  */
  62: public class ClassLoaderReferenceCommandSet
  63:   extends CommandSet
  64: {
  65:   public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)
  66:       throws JdwpException
  67:   {
  68: 
  69:     // Although there's only a single command to choose from we still use
  70:     // a switch to maintain consistency with the rest of the CommandSets
  71:    try
  72:       {
  73:         switch (command)
  74:           {
  75:           case JdwpConstants.CommandSet.ClassLoaderReference.VISIBLE_CLASSES:
  76:             executeVisibleClasses(bb, os);
  77:             break;
  78:           default:
  79:             throw new NotImplementedException("Command " + command +
  80:             " not found in ClassLoaderReference Command Set.");
  81:           }
  82:       }
  83:     catch (IOException ex)
  84:       {
  85:         // The DataOutputStream we're using isn't talking to a socket at all
  86:         // So if we throw an IOException we're in serious trouble
  87:         throw new JdwpInternalErrorException(ex);
  88:       }
  89: 
  90:    return false;
  91:   }
  92: 
  93:   public void executeVisibleClasses(ByteBuffer bb, DataOutputStream os)
  94:       throws JdwpException, IOException
  95:   {
  96:     ObjectId oId = idMan.readObjectId(bb);
  97:     ClassLoader cl = (ClassLoader) oId.getObject();
  98:     ArrayList loadRequests = VMVirtualMachine.getLoadRequests(cl);
  99:     os.writeInt(loadRequests.size());
 100:     for (Iterator iter = loadRequests.iterator(); iter.hasNext();)
 101:       {
 102:         Class clazz = (Class)iter.next();
 103:         ReferenceTypeId refId = idMan.getReferenceTypeId(clazz);
 104:         refId.writeTagged(os);
 105:       }
 106:   }
 107: 
 108: }