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Java file server with SMB, FTP/FTPS and NFS support, virtual filesystems, database filesystems
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/*
 * Copyright (C) 2006-2010 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see .
 */

package org.filesys.ftp;

/**
 * FTP Request Class
 *
 * Contains the details of an FTP request
 *
 * @author gkspencer
 */
public class FTPRequest {

    //	FTP command id
    private FTPCommand m_cmd;

    //	Command argument
    private String m_arg;

    /**
     * Default constructor
     */
    public FTPRequest() {
        m_cmd = FTPCommand.INVALID_CMD;
    }

    /**
     * Class constructor
     *
     * @param cmd FTPCommand
     * @param arg String
     */
    public FTPRequest(FTPCommand cmd, String arg) {
        m_cmd = cmd;
        m_arg = arg;
    }

    /**
     * Class constructor
     *
     * @param cmdLine String
     */
    public FTPRequest(String cmdLine) {

        //	Parse the FTP command record
        parseCommandLine(cmdLine);
    }

    /**
     * Return the command index
     *
     * @return FTPCommand
     */
    public final FTPCommand isCommand() {
        return m_cmd;
    }

    /**
     * Check if the request has an argument
     *
     * @return boolean
     */
    public final boolean hasArgument() {
        return m_arg != null ? true : false;
    }

    /**
     * Return the request argument
     *
     * @return String
     */
    public final String getArgument() {
        return m_arg;
    }

    /**
     * Set the command line for the request
     *
     * @param cmdLine String
     * @return int
     */
    public final FTPCommand setCommandLine(String cmdLine) {

        //	Reset the current values
        m_cmd = FTPCommand.INVALID_CMD;
        m_arg = null;

        //	Parse the new command line
        parseCommandLine(cmdLine);
        return isCommand();
    }

    /**
     * Parse a command string
     *
     * @param cmdLine String
     */
    protected final void parseCommandLine(String cmdLine) {

        //	Check if the command has an argument
        int pos = cmdLine.indexOf(' ');
        String cmd = null;

        if (pos != -1) {
            cmd = cmdLine.substring(0, pos);
            m_arg = cmdLine.substring(pos + 1);
        } else
            cmd = cmdLine;

        //	Validate the FTP command
        m_cmd = FTPCommand.getCommandId(cmd);
    }

    /**
     * Update the command argument
     *
     * @param arg String
     */
    protected final void updateArgument(String arg) {
        m_arg = arg;
    }

    /**
     * Return the FTP request as a string
     *
     * @return String
     */
    public String toString() {
        StringBuffer str = new StringBuffer();

        str.append("[");
        str.append(m_cmd.name());
        str.append(":");
        str.append(m_arg);
        str.append("]");

        return str.toString();
    }
}