gomp-20050608-branch/libjava/classpath/gnu/classpath/jdwp/processor/ArrayReferenceCommandSet.java

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