Source for gnu.classpath.jdwp.processor.ArrayReferenceCommandSet

   1: /* ArrayReferenceCommandSet.java -- class to implement the Array
   2:    Reference 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.exception.InvalidObjectException;
  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.value.Value;
  50: import gnu.classpath.jdwp.value.ValueFactory;
  51: 
  52: import java.io.DataOutputStream;
  53: import java.io.IOException;
  54: import java.lang.reflect.Array;
  55: import java.nio.ByteBuffer;
  56: 
  57: /**
  58:  * A class representing the ArrayReference Command Set.
  59:  *
  60:  * @author Aaron Luchko <aluchko@redhat.com>
  61:  */
  62: public class ArrayReferenceCommandSet
  63:   extends CommandSet
  64: {
  65:   public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)
  66:     throws JdwpException
  67:   {
  68:     try
  69:       {
  70:         switch (command)
  71:           {
  72:           case JdwpConstants.CommandSet.ArrayReference.LENGTH:
  73:             executeLength(bb, os);
  74:             break;
  75:           case JdwpConstants.CommandSet.ArrayReference.GET_VALUES:
  76:             executeGetValues(bb, os);
  77:             break;
  78:           case JdwpConstants.CommandSet.ArrayReference.SET_VALUES:
  79:             executeSetValues(bb, os);
  80:             break;
  81:           default:
  82:             throw new NotImplementedException("Command " + command +
  83:               " not found in Array Reference Command Set.");
  84:           }
  85:       }
  86:     catch (IOException ex)
  87:       {
  88:         // The DataOutputStream we're using isn't talking to a socket at all
  89:         // So if we throw an IOException we're in serious trouble
  90:         throw new JdwpInternalErrorException(ex);
  91:       }
  92: 
  93:     return false;
  94:   }
  95: 
  96:   private void executeLength(ByteBuffer bb, DataOutputStream os)
  97:     throws InvalidObjectException, IOException
  98:   {
  99:     ObjectId oid = idMan.readObjectId(bb);
 100:     Object array = oid.getObject();
 101:     os.writeInt(Array.getLength(array));
 102:   }
 103: 
 104:   private void executeGetValues(ByteBuffer bb, DataOutputStream os)
 105:     throws JdwpException, IOException
 106:   {
 107:     ObjectId oid = idMan.readObjectId(bb);
 108:     Object array = oid.getObject();
 109:     int first = bb.getInt();
 110:     int length = bb.getInt();
 111: 
 112:     // We need to write out the byte signifying the type of array first
 113:     Class clazz = array.getClass().getComponentType();
 114: 
 115:     // Uugh, this is a little ugly but it's the only time we deal with
 116:     // arrayregions
 117:     if (clazz == byte.class)
 118:       os.writeByte(JdwpConstants.Tag.BYTE);
 119:     else if (clazz == char.class)
 120:       os.writeByte(JdwpConstants.Tag.CHAR);
 121:     else if (clazz == float.class)
 122:       os.writeByte(JdwpConstants.Tag.FLOAT);
 123:     else if (clazz == double.class)
 124:       os.writeByte(JdwpConstants.Tag.DOUBLE);
 125:     else if (clazz == int.class)
 126:       os.writeByte(JdwpConstants.Tag.BYTE);
 127:     else if (clazz == long.class)
 128:       os.writeByte(JdwpConstants.Tag.LONG);
 129:     else if (clazz == short.class)
 130:       os.writeByte(JdwpConstants.Tag.SHORT);
 131:     else if (clazz == void.class)
 132:       os.writeByte(JdwpConstants.Tag.VOID);
 133:     else if (clazz == boolean.class)
 134:       os.writeByte(JdwpConstants.Tag.BOOLEAN);
 135:     else if (clazz.isArray())
 136:       os.writeByte(JdwpConstants.Tag.ARRAY);
 137:     else if (String.class.isAssignableFrom(clazz))
 138:       os.writeByte(JdwpConstants.Tag.STRING);
 139:     else if (Thread.class.isAssignableFrom(clazz))
 140:       os.writeByte(JdwpConstants.Tag.THREAD);
 141:     else if (ThreadGroup.class.isAssignableFrom(clazz))
 142:       os.writeByte(JdwpConstants.Tag.THREAD_GROUP);
 143:     else if (ClassLoader.class.isAssignableFrom(clazz))
 144:       os.writeByte(JdwpConstants.Tag.CLASS_LOADER);
 145:     else if (Class.class.isAssignableFrom(clazz))
 146:       os.writeByte(JdwpConstants.Tag.CLASS_OBJECT);
 147:     else
 148:       os.writeByte(JdwpConstants.Tag.OBJECT);
 149: 
 150:     // Write all the values, primitives should be untagged and Objects must be
 151:     // tagged
 152:     for (int i = first; i < first + length; i++)
 153:       {
 154:         Value val = ValueFactory.createFromObject(Array.get(array, i), clazz);
 155:         if (clazz.isPrimitive())
 156:           val.writeUntagged(os);
 157:         else
 158:           val.writeTagged(os);
 159:       }
 160:   }
 161: 
 162:   private void executeSetValues(ByteBuffer bb, DataOutputStream os)
 163:     throws IOException, JdwpException
 164:   {
 165:     ObjectId oid = idMan.readObjectId(bb);
 166:     Object array = oid.getObject();
 167:     int first = bb.getInt();
 168:     int length = bb.getInt();
 169:     Class type = array.getClass().getComponentType();
 170:     for (int i = first; i < first + length; i++)
 171:       {
 172:         Object value = Value.getUntaggedObject(bb, type);
 173:         Array.set(array, i, value);
 174:       }
 175:   }
 176: }