FtpCmdAppe.java

/*
 * ------------------------------------------------------------------------------
 * Hermes FTP Server
 * Copyright (c) 2005-2014 Lars Behnke
 * ------------------------------------------------------------------------------
 * 
 * This file is part of Hermes FTP Server.
 * 
 * Hermes FTP Server 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 of the License, or
 * (at your option) any later version.
 * 
 * Hermes FTP Server 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 Hermes FTP Server; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * ------------------------------------------------------------------------------
 */

package com.apporiented.hermesftp.cmd.impl;

import com.apporiented.hermesftp.cmd.AbstractFtpCmdStorFile;
import com.apporiented.hermesftp.exception.FtpCmdException;

/**
 * <b>APPEND (with create) (APPE)</b>
 * <p>
 * This command causes the server-DTP to accept the data transferred via the data connection and to
 * store the data in a file at the server site. If the file specified in the pathname exists at the
 * server site, then the data shall be appended to that file; otherwise the file specified in the
 * pathname shall be created at the server site.
 * <p>
 * <i>[Excerpt from RFC-959, Postel and Reynolds]</i>
 * </p>
 * 
 * @author Lars Behnke
 */
public class FtpCmdAppe extends AbstractFtpCmdStorFile {

    /**
     * {@inheritDoc}
     */
    public void execute() throws FtpCmdException {
        getCtx().setAttribute(ATTR_FILE_OFFSET, (long) -1);
        super.execute(false);
    }

    /**
     * {@inheritDoc}
     */
    public String getHelp() {
        return "Append data to file on server";
    }

    /**
     * {@inheritDoc}
     */
    public boolean isAuthenticationRequired() {
        return true;
    }

}