protected Object executeBasic()

in core/src/main/java/org/apache/jsieve/commands/extensions/Log.java [68:121]
39 lines of code
16 McCabe index (conditional complexity)

    protected Object executeBasic(MailAdapter mail, Arguments arguments,
            Block block, SieveContext context) throws SieveException {
        String logLevel = null;
        String message = null;

        // First MAY be a tag argument of fatal, error, warn, info, debug or
        // trace.
        // default is info.
        final ListIterator<Argument> argumentsIter = arguments.getArgumentList().listIterator();
        boolean stop = false;

        // Tag processing
        while (!stop && argumentsIter.hasNext()) {
            final Argument argument = argumentsIter.next();
            if (argument instanceof TagArgument) {
                final String tag = ((TagArgument) argument).getTag();

                // LogLevel?
                if (null == logLevel
                        && (tag.equals(ERROR_TAG)
                            || tag.equals(WARN_TAG) || tag.equals(INFO_TAG)
                            || tag.equals(DEBUG_TAG) || tag.equals(TRACE_TAG)))
                    logLevel = tag;
                else
                    throw context.getCoordinate().syntaxException(
                            "Found unexpected TagArgument");
            } else {
                // Stop when a non-tag argument is encountered
                argumentsIter.previous();
                stop = true;
            }
        }

        // Next MUST be a String
        if (argumentsIter.hasNext()) {
            final Argument argument = argumentsIter.next();
            if (argument instanceof StringListArgument) {
                List<String> strings = ((StringListArgument) argument).getList();
                if (1 == strings.size())
                    message = strings.get(0);
            }
        }
        if (null == message)
            throw context.getCoordinate().syntaxException("Expecting a String");

        // Everthing else is an error
        if (argumentsIter.hasNext())
            throw context.getCoordinate().syntaxException(
                    "Found unexpected arguments");

        log(null == logLevel ? ":info" : logLevel, message, context);

        return null;
    }