How to use

validForState

method

in

org.apache.james.imap.api.ImapCommand

/**
 * Parses a request into a command message for later processing.
 * 
 * @param request
 *            <code>ImapRequestLineReader</code>, not null
 * @return <code>ImapCommandMessage</code>, not null
 */
@Override
public final ImapMessage parse(ImapRequestLineReader request, String tag, ImapSession session) {
  ImapMessage result;
  if (!command.validForState(session.getState())) {
    result = statusResponseFactory.taggedNo(tag, command, HumanReadableText.INVALID_COMMAND);
  } else {
    try {
      result = decode(command, request, tag, session);
    } catch (DecodingException e) {
      LOGGER.debug("Cannot parse protocol ", e);
      result = statusResponseFactory.taggedBad(tag, command, e.getKey());
    }
  }
  return result;
}

/**
 * Parses a request into a command message for later processing.
 * 
 * @param request
 *            <code>ImapRequestLineReader</code>, not null
 * @return <code>ImapCommandMessage</code>, not null
 */
public final ImapMessage parse(ImapRequestLineReader request, String tag, ImapSession session) {
  ImapMessage result;
  if (!command.validForState(session.getState())) {
    result = statusResponseFactory.taggedNo(tag, command, HumanReadableText.INVALID_COMMAND);
  } else {
    try {
      result = decode(command, request, tag, session);
    } catch (DecodingException e) {
      if (session.getLog().isDebugEnabled()) {
        session.getLog().debug("Cannot parse protocol ", e);
      }
      result = statusResponseFactory.taggedBad(tag, command, e.getKey());
    }
  }
  return result;
}

final void doProcess(final M message, final ImapCommand command, final String tag, Responder responder, ImapSession session) {
  if (!command.validForState(session.getState())) {
    ImapResponseMessage response = factory.taggedNo(tag, command, HumanReadableText.INVALID_COMMAND);
    responder.respond(response);
  } else {
    getMailboxManager().startProcessingRequest(ImapSessionUtils.getMailboxSession(session));
    doProcess(message, session, tag, command, responder);
    getMailboxManager().endProcessingRequest(ImapSessionUtils.getMailboxSession(session));
  }
}

final void doProcess(M message, ImapCommand command, String tag, Responder responder, ImapSession session) {
  try {
    if (!command.validForState(session.getState())) {
      ImapResponseMessage response = factory.taggedNo(tag, command, HumanReadableText.INVALID_COMMAND);
      responder.respond(response);
    } else {
      getMailboxManager().startProcessingRequest(ImapSessionUtils.getMailboxSession(session));
      doProcess(message, session, tag, command, responder);
      getMailboxManager().endProcessingRequest(ImapSessionUtils.getMailboxSession(session));
    }
  } catch (DeniedAccessOnSharedMailboxException e) {
    no(command, tag, responder, HumanReadableText.DENIED_SHARED_MAILBOX);
  }
}