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/* EventRequestCommandSet.java -- class to implement the EventRequest Command

   Set

   Copyright (C) 2005, 2007 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

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.VMVirtualMachine;

import gnu.classpath.jdwp.event.EventManager;

import gnu.classpath.jdwp.event.EventRequest;

import gnu.classpath.jdwp.event.filters.ClassExcludeFilter;

import gnu.classpath.jdwp.event.filters.ClassMatchFilter;

import gnu.classpath.jdwp.event.filters.ClassOnlyFilter;

import gnu.classpath.jdwp.event.filters.ConditionalFilter;

import gnu.classpath.jdwp.event.filters.CountFilter;

import gnu.classpath.jdwp.event.filters.ExceptionOnlyFilter;

import gnu.classpath.jdwp.event.filters.FieldOnlyFilter;

import gnu.classpath.jdwp.event.filters.IEventFilter;

import gnu.classpath.jdwp.event.filters.InstanceOnlyFilter;

import gnu.classpath.jdwp.event.filters.LocationOnlyFilter;

import gnu.classpath.jdwp.event.filters.StepFilter;

import gnu.classpath.jdwp.event.filters.ThreadOnlyFilter;

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.id.ReferenceTypeId;

import gnu.classpath.jdwp.id.ThreadId;

import gnu.classpath.jdwp.util.JdwpString;

import gnu.classpath.jdwp.util.Location;

import java.io.DataOutputStream;

import java.io.IOException;

import java.nio.ByteBuffer;

/**

 * A class representing the EventRequest Command Set.

 *

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

 */

public class EventRequestCommandSet

  extends CommandSet

{

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

      throws JdwpException

  {

    try

      {

        switch (command)

          {

          case JdwpConstants.CommandSet.EventRequest.SET:

            executeSet(bb, os);

            break;

          case JdwpConstants.CommandSet.EventRequest.CLEAR:

            executeClear(bb, os);

            break;

          case JdwpConstants.CommandSet.EventRequest.CLEAR_ALL_BREAKPOINTS:

            executeClearAllBreakpoints(bb, os);

            break;

          default:

            throw new NotImplementedException("Command " + command +

              " not found in EventRequest 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 executeSet(ByteBuffer bb, DataOutputStream os)

      throws JdwpException, IOException

  {

    byte eventKind = bb.get();

    byte suspendPolicy = bb.get();

    int modifiers = bb.getInt();

    switch (eventKind)

      {

        case JdwpConstants.EventKind.FIELD_ACCESS:

        if (!VMVirtualMachine.canWatchFieldAccess)

          {

            String msg = "watching field accesses is not supported";

            throw new NotImplementedException(msg);

          }

        break;

        case JdwpConstants.EventKind.FIELD_MODIFICATION:

        if (!VMVirtualMachine.canWatchFieldModification)

          {

            String msg = "watching field modifications is not supported";

            throw new NotImplementedException(msg);

          }

        break;

      default:

        // okay

      }

    EventRequest eventReq = new EventRequest(eventKind, suspendPolicy);

    IEventFilter filter = null;

    ReferenceTypeId refId;

    for (int i = 0; i < modifiers; i++)

      {

        byte modKind = bb.get();

        switch (modKind)

          {

          case JdwpConstants.ModKind.COUNT:

            filter = new CountFilter(bb.getInt());

            break;

          case JdwpConstants.ModKind.CONDITIONAL:

            filter = new ConditionalFilter(idMan.readObjectId(bb));

            break;

          case JdwpConstants.ModKind.THREAD_ONLY:

            filter = new ThreadOnlyFilter((ThreadId) idMan.readObjectId(bb));

            break;

          case JdwpConstants.ModKind.CLASS_ONLY:

            filter = new ClassOnlyFilter(idMan.readReferenceTypeId(bb));

            break;

          case JdwpConstants.ModKind.CLASS_MATCH:

            filter = new ClassMatchFilter(JdwpString.readString(bb));

            break;

          case JdwpConstants.ModKind.CLASS_EXCLUDE:

            filter = new ClassExcludeFilter(JdwpString.readString(bb));

            break;

          case JdwpConstants.ModKind.LOCATION_ONLY:

            filter = new LocationOnlyFilter(new Location(bb));

            break;

          case JdwpConstants.ModKind.EXCEPTION_ONLY:

            long id = bb.getLong();

            if (id == 0)

              refId = null;

            else

              refId = idMan.getReferenceType(id);

            boolean caught = (bb.get() == 0) ? false : true;

            boolean unCaught = (bb.get() == 0) ? false : true;

            filter = new ExceptionOnlyFilter(refId, caught, unCaught);

            break;

          case JdwpConstants.ModKind.FIELD_ONLY:

            refId = idMan.readReferenceTypeId(bb);

            ReferenceTypeId fieldId = idMan.readReferenceTypeId(bb);

            filter = new FieldOnlyFilter(refId, fieldId);

            break;

          case JdwpConstants.ModKind.STEP:

            ThreadId tid = (ThreadId) idMan.readObjectId(bb);

            int size = bb.getInt();

            int depth = bb.getInt();

            filter = new StepFilter(tid, size, depth);

            break;

          case JdwpConstants.ModKind.INSTANCE_ONLY:

            ObjectId oid = idMan.readObjectId(bb);

            filter = new InstanceOnlyFilter(oid);

            break;

          default:

            throw new NotImplementedException("modKind " + modKind

                                              + " is not implemented.");

          }

        eventReq.addFilter(filter);

      }

    EventManager.getDefault().requestEvent(eventReq);

    os.writeInt(eventReq.getId());

  }

  private void executeClear(ByteBuffer bb, DataOutputStream os)

      throws JdwpException, IOException

  {

    byte eventKind = bb.get();

    int requestId = bb.getInt();

    EventManager.getDefault().deleteRequest(eventKind, requestId);

  }

  private void executeClearAllBreakpoints(ByteBuffer bb, DataOutputStream os)

      throws JdwpException, IOException

  {

    byte eventKind = bb.get ();

    EventManager.getDefault().clearRequests (eventKind);

  }

}