static Set readValueAsSet()

in ambari-infra-solr-plugin/src/main/java/org/apache/solr/security/InfraRuleBasedAuthorizationPlugin.java [227:247]

• 19 lines of code
• 8 McCabe index (conditional complexity)

  static Set<String> readValueAsSet(Map m, String key) {
    Set<String> result = new HashSet<>();
    Object val = m.get(key);
    if (val == null) {
      if("collection".equals(key)){
        //for collection collection: null means a core admin/ collection admin request
        // otherwise it means a request where collection name is ignored
        return m.containsKey(key) ? singleton((String) null) : singleton("*");
      }
      return null;
    }
    if (val instanceof Collection) {
      Collection list = (Collection) val;
      for (Object o : list) result.add(String.valueOf(o));
    } else if (val instanceof String) {
      result.add((String) val);
    } else {
      throw new RuntimeException("Bad value for : " + key);
    }
    return result.isEmpty() ? null : Collections.unmodifiableSet(result);
  }