private String expandDomain()

in resolver/src/main/java/org/apache/james/jspf/core/MacroExpand.java [220:252]

• 26 lines of code
• 10 McCabe index (conditional complexity)

    private String expandDomain(String input, MacroData macroData) throws PermErrorException, RequireClientDomainException {

        LOGGER.debug("Start expand domain: {}", input);

        Matcher inputMatcher = domainSpecPattern.matcher(input);
        if (!inputMatcher.matches() || inputMatcher.groupCount() != 2) {
            throw new PermErrorException("Invalid DomainSpec: "+input);
        }

        StringBuffer res = new StringBuffer();
        if (inputMatcher.group(1) != null && inputMatcher.group(1).length() > 0) {
            res.append(expandMacroString(inputMatcher.group(1), macroData, false));
        }
        if (inputMatcher.group(2) != null && inputMatcher.group(2).length() > 0) {
            if (inputMatcher.group(2).startsWith(".")) {
                res.append(inputMatcher.group(2));
            } else {
                res.append(expandMacroString(inputMatcher.group(2), macroData, false));
            }
        }
        
        String domainName = expandMacroString(input, macroData, false);
        // reduce to less than 255 characters, deleting subdomains from left
        int split = 0;
        while (domainName.length() > 255 && split > -1) {
            split = domainName.indexOf(".");
            domainName = domainName.substring(split + 1);
        }

        LOGGER.debug("Domain expanded: {}", domainName);
        
        return domainName;
    }