Source for gnu.classpath.jdwp.processor.MethodCommandSet

   1: /* MethodCommandSet.java -- class to implement the Method 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.VMVirtualMachine;
  43: import gnu.classpath.jdwp.exception.JdwpException;
  44: import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
  45: import gnu.classpath.jdwp.exception.NotImplementedException;
  46: import gnu.classpath.jdwp.id.ObjectId;
  47: import gnu.classpath.jdwp.id.ReferenceTypeId;
  48: import gnu.classpath.jdwp.util.LineTable;
  49: import gnu.classpath.jdwp.util.VariableTable;
  50: 
  51: import java.io.DataOutputStream;
  52: import java.io.IOException;
  53: import java.lang.reflect.Method;
  54: import java.nio.ByteBuffer;
  55: 
  56: /**
  57:  * A class representing the Method Command Set.
  58:  * 
  59:  * @author Aaron Luchko <aluchko@redhat.com>
  60:  */
  61: public class MethodCommandSet
  62:   extends CommandSet
  63: {
  64:   public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)
  65:       throws JdwpException
  66:   {
  67:     try
  68:       {
  69:         switch (command)
  70:           {
  71:           case JdwpConstants.CommandSet.Method.LINE_TABLE:
  72:             executeLineTable(bb, os);
  73:             break;
  74:           case JdwpConstants.CommandSet.Method.VARIABLE_TABLE:
  75:             executeVariableTable(bb, os);
  76:             break;
  77:           case JdwpConstants.CommandSet.Method.BYTE_CODES:
  78:             executeByteCodes(bb, os);
  79:             break;
  80:           case JdwpConstants.CommandSet.Method.IS_OBSOLETE:
  81:             executeIsObsolete(bb, os);
  82:             break;
  83:           case JdwpConstants.CommandSet.Method.VARIABLE_TABLE_WITH_GENERIC:
  84:             executeVariableTableWithGeneric(bb, os);
  85:             break;
  86:           default:
  87:             throw new NotImplementedException(
  88:               "Command " + command + " not found in Method Command Set.");
  89:           }
  90:       }
  91:     catch (IOException ex)
  92:       {
  93:         // The DataOutputStream we're using isn't talking to a socket at all
  94:         // So if we throw an IOException we're in serious trouble
  95:         throw new JdwpInternalErrorException(ex);
  96:       }
  97: 
  98:     return false;
  99:   }
 100: 
 101:   private void executeLineTable(ByteBuffer bb, DataOutputStream os)
 102:       throws JdwpException, IOException
 103:   {
 104:     ReferenceTypeId refId = idMan.readReferenceTypeId(bb);
 105:     Class clazz = refId.getType();
 106: 
 107:     ObjectId oid = idMan.readObjectId(bb);
 108:     Method method = (Method) oid.getObject();
 109: 
 110:     LineTable lt = VMVirtualMachine.getLineTable(clazz, method);
 111:     lt.write(os);
 112:   }
 113: 
 114:   private void executeVariableTable(ByteBuffer bb, DataOutputStream os)
 115:       throws JdwpException, IOException
 116:   {
 117:     ReferenceTypeId refId = idMan.readReferenceTypeId(bb);
 118:     Class clazz = refId.getType();
 119: 
 120:     ObjectId oid = idMan.readObjectId(bb);
 121:     Method method = (Method) oid.getObject();
 122: 
 123:     VariableTable vt = VMVirtualMachine.getVarTable(clazz, method);
 124:     vt.write(os);
 125:   }
 126: 
 127:   private void executeByteCodes(ByteBuffer bb, DataOutputStream os)
 128:       throws JdwpException
 129:   {
 130:     // This command is optional, determined by VirtualMachines CapabilitiesNew
 131:     // so we'll leave it till later to implement
 132:     throw new NotImplementedException("Command ByteCodes not implemented.");
 133:   }
 134: 
 135:   private void executeIsObsolete(ByteBuffer bb, DataOutputStream os)
 136:       throws IOException
 137:   {
 138:     // The debugger is really asking if this method has been redefined using
 139:     // VirtualMachineCommandSet.RedefineClasses. Since we don't implement that
 140:     // command the answer to this will always be false.
 141:     os.writeBoolean(false);
 142:   }
 143: 
 144:   private void executeVariableTableWithGeneric(ByteBuffer bb,
 145:                                                DataOutputStream os)
 146:       throws JdwpException
 147:   {
 148:     // We don't have generics yet
 149:     throw new NotImplementedException(
 150:       "Command SourceDebugExtension not implemented.");
 151:   }
 152: 
 153: }