Source for gnu.classpath.jdwp.processor.ArrayTypeCommandSet

   1: /* ArrayTypeCommandSet.java -- class to implement the ArrayType Command Set
   2:    Copyright (C) 2005 Free Software Foundation
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.classpath.jdwp.processor;
  40: 
  41: import gnu.classpath.jdwp.JdwpConstants;
  42: import gnu.classpath.jdwp.exception.JdwpException;
  43: import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
  44: import gnu.classpath.jdwp.exception.NotImplementedException;
  45: import gnu.classpath.jdwp.id.ObjectId;
  46: import gnu.classpath.jdwp.id.ReferenceTypeId;
  47: 
  48: import java.io.DataOutputStream;
  49: import java.io.IOException;
  50: import java.lang.reflect.Array;
  51: import java.nio.ByteBuffer;
  52: 
  53: /**
  54:  * A class representing the ArrayType Command Set.
  55:  *
  56:  * @author Aaron Luchko <aluchko@redhat.com>
  57:  */
  58: public class ArrayTypeCommandSet
  59:   extends CommandSet
  60: {
  61:   public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)
  62:     throws JdwpException
  63:   {
  64: 
  65:     // Although there's only a single command to choose from we still use
  66:     // a switch to maintain consistency with the rest of the CommandSets
  67:     try
  68:       {
  69:         switch (command)
  70:           {
  71:           case JdwpConstants.CommandSet.ArrayType.NEW_INSTANCE:
  72:             executeNewInstance(bb, os);
  73:             break;
  74:           default:
  75:             throw new NotImplementedException("Command " + command +
  76:               " not found in ArrayType Command Set.");
  77:         }
  78:       }
  79:     catch (IOException ex)
  80:       {
  81:         // The DataOutputStream we're using isn't talking to a socket at all
  82:         // So if we throw an IOException we're in serious trouble
  83:         throw new JdwpInternalErrorException(ex);
  84:       }
  85: 
  86:     return false;
  87:   }
  88: 
  89:   public void executeNewInstance(ByteBuffer bb, DataOutputStream os)
  90:     throws JdwpException, IOException
  91:   {
  92:     ReferenceTypeId refId = idMan.readReferenceTypeId(bb);
  93:     Class arrayType = refId.getType();
  94:     Class componentType = arrayType.getComponentType();
  95: 
  96:     int length = bb.getInt();
  97:     Object newArray = Array.newInstance(componentType, length);
  98:     ObjectId oid = idMan.getObjectId(newArray);
  99: 
 100:     // Since this array isn't referenced anywhere we'll disable garbage
 101:     // collection on it so it's still around when the debugger gets back to it.
 102:     oid.disableCollection();
 103:     oid.writeTagged(os);
 104:   }
 105: }