Spring Security 2资源-角色查找源

    private ConfigAttributeDefinition lookupUrlInMap(Map requestMap, String url) {
        ConfigAttributeDefinition cad = (ConfigAttributeDefinition)requestMap.get(url);
        if(cad != null) {
            return cad;
        }
          
        Iterator entries = requestMap.entrySet().iterator();

        while (entries.hasNext()) {
            Map.Entry entry = (Map.Entry) entries.next();
            Object p = entry.getKey();
            boolean matched = urlMatcher.pathMatchesUrl(p, url);

            if (logger.isDebugEnabled()) {
                logger.debug("Candidate is: '" + url + "'; pattern is " + p + "; matched=" + matched);
            }

            if (matched) {
                return (ConfigAttributeDefinition) entry.getValue();
            }
        }

        return null;
    }
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