return !isEmpty(text);
    }

    /**
     * Replaces all occurrences of a substring within a string with another string.
     *
     * @param text
     *            The original string.
     * @param fromText
     *            The substring to be replaced.
     * @param toText
     *            The replacement substring.
     * @return The resulting string after replacements.
     */

                if (lastIndex >= 0) {
                    String retVal = expr.substring(0, index);

                    if ((index > 0) && (expr.charAt(index - 1) == '$')) {
                        retVal += expr.substring(index + 1, lastIndex + 1);
                    } else {
                        Object subResult = evaluate(expr.substring(index, lastIndex + 1));

                        if (subResult != null) {

                if (lastIndex >= 0) {
                    String retVal = expr.substring(0, index);

                    if ((index > 0) && (expr.charAt(index - 1) == '$')) {
                        retVal += expr.substring(index + 1, lastIndex + 1);
                    } else {
                        Object subResult = evaluate(expr.substring(index, lastIndex + 1));

                        if (subResult != null) {

                    hasPriority = true;
                } catch (NumberFormatException e) {
                    // priority must be an integer
                    priority = 0;
                    hasPriority = false;
                }
            }
            if (hasPriority) {
                this.phase = phase.substring(phaseStart, phaseEnd);

        if (lower.startsWith(allowPrefix)) {
            lower = lower.substring(allowPrefix.length());
            permission = permission.substring(allowPrefix.length());
            aclPrefix = StringUtil.EMPTY;
        } else if (lower.startsWith(denyPrefix)) {
            lower = lower.substring(denyPrefix.length());
            permission = permission.substring(denyPrefix.length());

            if (expandedNames.length > 0) {
                dr.server = expandedNames[0].substring(1).toLowerCase();
            } else {
                dr.server = ref.getSpecialName().substring(1).toLowerCase();
            }
            if (log.isDebugEnabled()) {
                log.debug("Server " + dr.server + " path " + reqPath + " remain " + reqPath.substring(consumed) + " path consumed "
                        + consumed);
            }

		result.combine(e.Substring.Expr.analyze(s))
		switch {
		case e.Substring.From != nil:
			result.combine(e.Substring.From.analyze(s))
			if e.Substring.For != nil {
				result.combine(e.Substring.Expr.analyze(s))
			}
		case e.Substring.Arg2 != nil:
			result.combine(e.Substring.Arg2.analyze(s))
			if e.Substring.Arg3 != nil {
				result.combine(e.Substring.Arg3.analyze(s))
			}
		default:

    private boolean determineVersionMatch(String version) {
        String test = version;
        boolean reverse = false;

        if (test.startsWith("!")) {
            reverse = true;
            test = test.substring(1);
        }

        boolean result = Os.OS_VERSION.equals(test);

        if (reverse) {
            return !result;
        } else {
            return result;
        }
    }

                final String className = entryName.substring(startPos, entryName.length() - CLASS_SUFFIX.length()).replace('/', '.');
                final int pos = className.lastIndexOf('.');
                final String packageName = pos == -1 ? null : className.substring(0, pos);
                final String shortClassName = pos == -1 ? className : className.substring(pos + 1);

        final boolean result;
        if (test.startsWith(REGEX_PREFIX)) {
            result = actualVersion.matches(test.substring(REGEX_PREFIX.length()));
        } else {
            if (test.startsWith("!")) {
                reverse = true;
                test = test.substring(1);
            }
            result = actualVersion.equalsIgnoreCase(test);
        }

        return reverse != result;
    }