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Panda Core is the core module of Panda Framework, it contains commonly used utility classes similar to apache-commons.

There is a newer version: 1.8.0

package panda.net.smtp;

/**
 * SMTPCommand stores a set of constants for SMTP command codes. To interpret the meaning of the
 * codes, familiarity with RFC 821 is assumed. The mnemonic constant names are transcriptions from
 * the code descriptions of RFC 821. For those who think in terms of the actual SMTP commands, a set
 * of constants such as {@link #HELO HELO } are provided where the constant name is the same as the
 * SMTP command.
 */

public final class SMTPCommand {

	public static final int HELO = 0;
	public static final int MAIL = 1;
	public static final int RCPT = 2;
	public static final int DATA = 3;
	public static final int SEND = 4;
	public static final int SOML = 5;
	public static final int SAML = 6;
	public static final int RSET = 7;
	public static final int VRFY = 8;
	public static final int EXPN = 9;
	public static final int HELP = 10;
	public static final int NOOP = 11;
	public static final int TURN = 12;
	public static final int QUIT = 13;

	/**
	 * The authorization command
	 */
	public static final int AUTH = 14;

	/**
	 * The extended hello command
	 */
	public static final int EHLO = 15;

	private static final int _NEXT_ = EHLO + 1; // update as necessary when adding new entries

	public static final int HELLO = HELO;
	public static final int LOGIN = HELO;
	public static final int MAIL_FROM = MAIL;
	public static final int RECIPIENT = RCPT;
	public static final int SEND_MESSAGE_DATA = DATA;
	public static final int SEND_FROM = SEND;
	public static final int SEND_OR_MAIL_FROM = SOML;
	public static final int SEND_AND_MAIL_FROM = SAML;
	public static final int RESET = RSET;
	public static final int VERIFY = VRFY;
	public static final int EXPAND = EXPN;
	// public static final int HELP = HELP;
	// public static final int NOOP = NOOP;
	// public static final int TURN = TURN;
	// public static final int QUIT = QUIT;
	public static final int LOGOUT = QUIT;

	// Cannot be instantiated
	private SMTPCommand() {
	}

	private static final String[] _commands = { "HELO", "MAIL FROM:", "RCPT TO:", "DATA", "SEND FROM:", "SOML FROM:",
			"SAML FROM:", "RSET", "VRFY", "EXPN", "HELP", "NOOP", "TURN", "QUIT", "AUTH", "EHLO" };

	static {
		if (_commands.length != _NEXT_) {
			throw new RuntimeException("Error in array definition");
		}
	}

	/***
	 * Retrieve the SMTP protocol command string corresponding to a specified command code.
	 * 
	 * 
	 * @param command The command code.
	 * @return The SMTP protcol command string corresponding to a specified command code.
	 ***/
	public static final String getCommand(int command) {
		return _commands[command];
	}

}