Source for gnu.classpath.jdwp.processor.MethodCommandSet

   1: /* MethodCommandSet.java -- class to implement the Method Command Set
   2:    Copyright (C) 2005, 2006, 2007 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.VMMethod;
  43: import gnu.classpath.jdwp.VMVirtualMachine;
  44: import gnu.classpath.jdwp.exception.JdwpException;
  45: import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
  46: import gnu.classpath.jdwp.exception.NotImplementedException;
  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.nio.ByteBuffer;
  54: 
  55: /**
  56:  * A class representing the Method Command Set.
  57:  *
  58:  * @author Aaron Luchko <aluchko@redhat.com>
  59:  */
  60: public class MethodCommandSet
  61:   extends CommandSet
  62: {
  63:   public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)
  64:       throws JdwpException
  65:   {
  66:     try
  67:       {
  68:         switch (command)
  69:           {
  70:           case JdwpConstants.CommandSet.Method.LINE_TABLE:
  71:             executeLineTable(bb, os);
  72:             break;
  73:           case JdwpConstants.CommandSet.Method.VARIABLE_TABLE:
  74:             executeVariableTable(bb, os);
  75:             break;
  76:           case JdwpConstants.CommandSet.Method.BYTE_CODES:
  77:             executeByteCodes(bb, os);
  78:             break;
  79:           case JdwpConstants.CommandSet.Method.IS_OBSOLETE:
  80:             executeIsObsolete(bb, os);
  81:             break;
  82:           case JdwpConstants.CommandSet.Method.VARIABLE_TABLE_WITH_GENERIC:
  83:             executeVariableTableWithGeneric(bb, os);
  84:             break;
  85:           default:
  86:             throw new NotImplementedException(
  87:               "Command " + command + " not found in Method Command Set.");
  88:           }
  89:       }
  90:     catch (IOException ex)
  91:       {
  92:         // The DataOutputStream we're using isn't talking to a socket at all
  93:         // So if we throw an IOException we're in serious trouble
  94:         throw new JdwpInternalErrorException(ex);
  95:       }
  96: 
  97:     return false;
  98:   }
  99: 
 100:   private void executeLineTable(ByteBuffer bb, DataOutputStream os)
 101:       throws JdwpException, IOException
 102:   {
 103:     ReferenceTypeId refId = idMan.readReferenceTypeId(bb);
 104:     Class clazz = refId.getType();
 105: 
 106:     VMMethod method = VMMethod.readId(clazz, bb);
 107:     LineTable lt = method.getLineTable();
 108:     lt.write(os);
 109:   }
 110: 
 111:   private void executeVariableTable(ByteBuffer bb, DataOutputStream os)
 112:       throws JdwpException, IOException
 113:   {
 114:     ReferenceTypeId refId = idMan.readReferenceTypeId(bb);
 115:     Class clazz = refId.getType();
 116: 
 117:     VMMethod method = VMMethod.readId(clazz, bb);
 118:     VariableTable vt = method.getVariableTable();
 119:     vt.write(os);
 120:   }
 121: 
 122:   private void executeByteCodes(ByteBuffer bb, DataOutputStream os)
 123:     throws JdwpException, IOException
 124:   {
 125:     if (!VMVirtualMachine.canGetBytecodes)
 126:       {
 127:         String msg = "getting bytecodes is unsupported";
 128:         throw new NotImplementedException(msg);
 129:       }
 130: 
 131:     ReferenceTypeId id = idMan.readReferenceTypeId(bb);
 132:     Class klass = id.getType();
 133:     VMMethod method = VMMethod.readId(klass, bb);
 134:     byte[] bytecode = VMVirtualMachine.getBytecodes(method);
 135:     os.writeInt(bytecode.length);
 136:     os.write(bytecode);
 137:   }
 138: 
 139:   private void executeIsObsolete(ByteBuffer bb, DataOutputStream os)
 140:       throws IOException
 141:   {
 142:     // The debugger is really asking if this method has been redefined using
 143:     // VirtualMachineCommandSet.RedefineClasses. Since we don't implement that
 144:     // command the answer to this will always be false.
 145:     os.writeBoolean(false);
 146:   }
 147: 
 148:   private void executeVariableTableWithGeneric(ByteBuffer bb,
 149:                                                DataOutputStream os)
 150:       throws JdwpException
 151:   {
 152:     // We don't have generics yet
 153:     throw new NotImplementedException(
 154:       "Command VariableTableWithGeneric not implemented.");
 155:   }
 156: 
 157: }