@Override
 public Set<String> retrieveUserGroups(LdapUserContext userContext) throws LdapException {
   Set<String> groups = new HashSet<String>();
   try {
     Filter groupClassFilter;
     if (groupObjectClass != null && !groupObjectClass.isEmpty()) {
       groupClassFilter = Filter.createEqualityFilter("objectClass", groupObjectClass);
     } else {
       groupClassFilter = Filter.createPresenceFilter("objectClass");
     }
     Filter filter =
         Filter.createANDFilter(
             groupClassFilter,
             Filter.createEqualityFilter(groupMemberAttribute, userContext.getDn()));
     LOGGER.debug(filter.toString());
     SearchResult searchResult =
         ldapConnectionPool.search(
             StringUtils.join(groupBase, ','), SearchScope.SUB, filter, "cn");
     for (SearchResultEntry entry : searchResult.getSearchEntries()) {
       groups.add(entry.getAttributeValue("cn"));
     }
     return groups;
   } catch (com.unboundid.ldap.sdk.LDAPException e) {
     throw new LdapException(e);
   }
 }
 public Filter createBaseFilter() {
   if (auxiliaryClasses.length == 0) {
     return Filter.createEqualityFilter("objectClass", structuralClass);
   } else {
     final ArrayList<Filter> comps = new ArrayList<Filter>(1 + auxiliaryClasses.length);
     comps.add(Filter.createEqualityFilter("objectClass", structuralClass));
     for (final String s : auxiliaryClasses) {
       comps.add(Filter.createEqualityFilter("objectClass", s));
     }
     return Filter.createANDFilter(comps);
   }
 }
 @Override
 public LdapUserContext findUser(String identityAttributeValue) throws LdapException {
   try {
     Filter userClassFilter;
     if (userObjectClass != null && !userObjectClass.isEmpty()) {
       userClassFilter = Filter.createEqualityFilter("objectClass", userObjectClass);
     } else {
       userClassFilter = Filter.createPresenceFilter("objectClass");
     }
     Filter filter =
         Filter.createANDFilter(
             userClassFilter,
             Filter.createEqualityFilter(userIdentityAttribute, identityAttributeValue));
     LOGGER.debug(filter.toString());
     String[] attributesToRetrieve;
     if (userAdditionalAttributes != null) {
       attributesToRetrieve = userAdditionalAttributes;
       if (!ArrayUtils.contains(attributesToRetrieve, "cn")
           || !ArrayUtils.contains(attributesToRetrieve, "CN")) {
         ArrayUtils.add(attributesToRetrieve, "cn");
       }
     } else {
       attributesToRetrieve = new String[] {"cn"};
     }
     SearchResult searchResult =
         ldapConnectionPool.search(
             StringUtils.join(userBase, ','), SearchScope.SUB, filter, attributesToRetrieve);
     if (searchResult.getEntryCount() != 1) {
       throw new UnknownAccountException();
     }
     SearchResultEntry searchResultEntry = searchResult.getSearchEntries().get(0);
     String dn = searchResultEntry.getDN();
     DefaultLdapUserContext ldapUserContext = internalCreateUser(dn);
     ldapUserContext.getKnownAttributes().put("cn", searchResultEntry.getAttributeValue("cn"));
     return ldapUserContext;
   } catch (com.unboundid.ldap.sdk.LDAPException e) {
     throw new LdapException(e);
   }
 }
  private Filter createFilter(final T o, final AtomicBoolean addedRequiredOrAllowed)
      throws LDAPPersistException {
    final ArrayList<Attribute> attrs = new ArrayList<Attribute>(5);
    attrs.add(objectClassAttribute);

    for (final FieldInfo i : requiredFilterFields) {
      final Attribute a = i.encode(o, true);
      if (a == null) {
        throw new LDAPPersistException(
            ERR_OBJECT_HANDLER_FILTER_MISSING_REQUIRED_FIELD.get(i.getField().getName()));
      } else {
        attrs.add(a);
        addedRequiredOrAllowed.set(true);
      }
    }

    for (final GetterInfo i : requiredFilterGetters) {
      final Attribute a = i.encode(o);
      if (a == null) {
        throw new LDAPPersistException(
            ERR_OBJECT_HANDLER_FILTER_MISSING_REQUIRED_GETTER.get(i.getMethod().getName()));
      } else {
        attrs.add(a);
        addedRequiredOrAllowed.set(true);
      }
    }

    for (final FieldInfo i : alwaysAllowedFilterFields) {
      final Attribute a = i.encode(o, true);
      if (a != null) {
        attrs.add(a);
        addedRequiredOrAllowed.set(true);
      }
    }

    for (final GetterInfo i : alwaysAllowedFilterGetters) {
      final Attribute a = i.encode(o);
      if (a != null) {
        attrs.add(a);
        addedRequiredOrAllowed.set(true);
      }
    }

    for (final FieldInfo i : conditionallyAllowedFilterFields) {
      final Attribute a = i.encode(o, true);
      if (a != null) {
        attrs.add(a);
      }
    }

    for (final GetterInfo i : conditionallyAllowedFilterGetters) {
      final Attribute a = i.encode(o);
      if (a != null) {
        attrs.add(a);
      }
    }

    final ArrayList<Filter> comps = new ArrayList<Filter>(attrs.size());
    for (final Attribute a : attrs) {
      for (final ASN1OctetString v : a.getRawValues()) {
        comps.add(Filter.createEqualityFilter(a.getName(), v.getValue()));
      }
    }

    if (superclassHandler != null) {
      final Filter f = superclassHandler.createFilter(o, addedRequiredOrAllowed);
      if (f.getFilterType() == Filter.FILTER_TYPE_AND) {
        comps.addAll(Arrays.asList(f.getComponents()));
      } else {
        comps.add(f);
      }
    }

    return Filter.createANDFilter(comps);
  }