/*

 *   SONEWS News Server

 *   see AUTHORS for the list of contributors

 *

 *   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, either version 3 of the License, or

 *   (at your option) any later version.

 *

 *   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, see <http://www.gnu.org/licenses/>.

 */

package org.sonews.daemon.command;

import java.io.IOException;

import org.sonews.daemon.NNTPConnection;

import org.sonews.storage.StorageBackendException;

/**

 * Interface for pluggable NNTP commands handling classes.

 * @author Christian Lins

 * @since sonews/0.6.0

 */

public interface Command

{

  /**

   * @return true if this instance can be reused.

   */

  boolean hasFinished();

  /**

   * Returns capability string that is implied by this command class.

   * MAY return null if the command is required by the NNTP standard.

   */

  String impliedCapability();

  boolean isStateful();

  String[] getSupportedCommandStrings();

  void processLine(NNTPConnection conn, String line, byte[] rawLine)

    throws IOException, StorageBackendException;

}