client.h

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
 *
 *  Copyright (C) 2008 Sun Microsystems, Inc.
 *
 *  This program 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; version 2 of the License.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#pragma once

#include <drizzled/catalog/instance.h>
#include <drizzled/catalog/local.h>
#include <drizzled/error_t.h>
#include <drizzled/item.h>
#include <drizzled/visibility.h>

namespace drizzled {
namespace plugin {

class DRIZZLED_API Client
{
protected:
  Session *session;

public:
  virtual ~Client() {}

  virtual Session *getSession()
  {
    return session;
  }

  virtual void setSession(Session *session_arg)
  {
    session= session_arg;
  }

  virtual int getFileDescriptor()= 0;

  virtual bool isConnected()= 0;

  virtual bool flush()= 0;

  virtual void close()= 0;

  virtual bool authenticate()= 0;

  virtual bool isConsole() const
  {
    return false;
  }

  virtual bool isInteractive() const
  {
    return false;
  }

  virtual catalog::Instance::shared_ptr catalog()
  {
    return catalog::local();
  }

  virtual bool readCommand(char **packet, uint32_t& packet_length)= 0;

  /* Send responses. */
  virtual void sendOK()= 0;
  virtual void sendEOF()= 0;
  virtual void sendError(const drizzled::error_t sql_errno, const char *err)= 0;

  virtual void sendFields(List<Item>&)= 0;

  /* Send result fields in various forms. */
  virtual void store(Field *from)= 0;
  virtual void store()= 0;
  virtual void store(int32_t from)= 0;
  virtual void store(uint32_t from)= 0;
  virtual void store(int64_t from)= 0;
  virtual void store(uint64_t from)= 0;
  virtual void store(double from, uint32_t decimals, String *buffer)= 0;
  virtual void store(const type::Time *from);
  virtual void store(const char *from);
  virtual void store(const char *from, size_t length)= 0;
  virtual void store(str_ref from)
  {
    store(from.data(), from.size());
  }

  /* Try to remove these. */
  virtual bool haveError()= 0;
  virtual bool wasAborted()= 0;

};

} /* namespace plugin */
} /* namespace drizzled */