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/* ArrayReferenceCommandSet.java -- class to implement the Array

   Reference Command Set

   Copyright (C) 2005 Free Software Foundation

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.classpath.jdwp.processor;

import gnu.classpath.jdwp.JdwpConstants;

import gnu.classpath.jdwp.exception.InvalidObjectException;

import gnu.classpath.jdwp.exception.JdwpException;

import gnu.classpath.jdwp.exception.JdwpInternalErrorException;

import gnu.classpath.jdwp.exception.NotImplementedException;

import gnu.classpath.jdwp.id.ObjectId;

import gnu.classpath.jdwp.util.Value;

import java.io.DataOutputStream;

import java.io.IOException;

import java.lang.reflect.Array;

import java.nio.ByteBuffer;

/**

 * A class representing the ArrayReference Command Set.

 *

 * @author Aaron Luchko <aluchko@redhat.com>

 */

public class ArrayReferenceCommandSet

  extends CommandSet

{

  public boolean runCommand(ByteBuffer bb, DataOutputStream os, byte command)

    throws JdwpException

  {

    try

      {

        switch (command)

          {

          case JdwpConstants.CommandSet.ArrayReference.LENGTH:

            executeLength(bb, os);

            break;

          case JdwpConstants.CommandSet.ArrayReference.GET_VALUES:

            executeGetValues(bb, os);

            break;

          case JdwpConstants.CommandSet.ArrayReference.SET_VALUES:

            executeSetValues(bb, os);

            break;

          default:

            throw new NotImplementedException("Command " + command +

              " not found in Array Reference Command Set.");

          }

      }

    catch (IOException ex)

      {

        // The DataOutputStream we're using isn't talking to a socket at all

        // So if we throw an IOException we're in serious trouble

        throw new JdwpInternalErrorException(ex);

      }

    return false;

  }

  private void executeLength(ByteBuffer bb, DataOutputStream os)

    throws InvalidObjectException, IOException

  {

    ObjectId oid = idMan.readObjectId(bb);

    Object array = oid.getObject();

    os.writeInt(Array.getLength(array));

  }

  private void executeGetValues(ByteBuffer bb, DataOutputStream os)

    throws JdwpException, IOException

  {

    ObjectId oid = idMan.readObjectId(bb);

    Object array = oid.getObject();

    int first = bb.getInt();

    int length = bb.getInt();

    // We need to write out the byte signifying the type of array first

    Class clazz = array.getClass().getComponentType();

    // Uugh, this is a little ugly but it's the only time we deal with

    // arrayregions

    if (clazz == byte.class)

      os.writeByte(JdwpConstants.Tag.BYTE);

    else if (clazz == char.class)

      os.writeByte(JdwpConstants.Tag.CHAR);

    else if (clazz == float.class)

      os.writeByte(JdwpConstants.Tag.FLOAT);

    else if (clazz == double.class)

      os.writeByte(JdwpConstants.Tag.DOUBLE);

    else if (clazz == int.class)

      os.writeByte(JdwpConstants.Tag.BYTE);

    else if (clazz == long.class)

      os.writeByte(JdwpConstants.Tag.LONG);

    else if (clazz == short.class)

      os.writeByte(JdwpConstants.Tag.SHORT);

    else if (clazz == void.class)

      os.writeByte(JdwpConstants.Tag.VOID);

    else if (clazz == boolean.class)

      os.writeByte(JdwpConstants.Tag.BOOLEAN);

    else if (clazz.isArray())

      os.writeByte(JdwpConstants.Tag.ARRAY);

    else if (String.class.isAssignableFrom(clazz))

      os.writeByte(JdwpConstants.Tag.STRING);

    else if (Thread.class.isAssignableFrom(clazz))

      os.writeByte(JdwpConstants.Tag.THREAD);

    else if (ThreadGroup.class.isAssignableFrom(clazz))

      os.writeByte(JdwpConstants.Tag.THREAD_GROUP);

    else if (ClassLoader.class.isAssignableFrom(clazz))

      os.writeByte(JdwpConstants.Tag.CLASS_LOADER);

    else if (Class.class.isAssignableFrom(clazz))

      os.writeByte(JdwpConstants.Tag.CLASS_OBJECT);

    else

      os.writeByte(JdwpConstants.Tag.OBJECT);

    // Write all the values, primitives should be untagged and Objects must be

    // tagged

    for (int i = first; i < first + length; i++)

      {

        Object value = Array.get(array, i);

        if (clazz.isPrimitive())

          Value.writeUntaggedValue(os, value);

        else

          Value.writeTaggedValue(os, value);

      }

  }

  private void executeSetValues(ByteBuffer bb, DataOutputStream os)

    throws IOException, JdwpException

  {

    ObjectId oid = idMan.readObjectId(bb);

    Object array = oid.getObject();

    int first = bb.getInt();

    int length = bb.getInt();

    Class type = array.getClass().getComponentType();

    for (int i = first; i < first + length; i++)

      {

        Object value = Value.getUntaggedObj(bb, type);

        Array.set(array, i, value);

      }

  }

}