active directory - Java how to get get an Attribute from ldap using the DN? -

i have java application use search groups. works pretty search based on group name (cn) more 1 result since same cn used in other branches. have dn of group , wondering how search based on dn or if it's possible access attribute directly since have full path. here code use :

public group getgroup( string groupname) throws exception {          list<user> memberlist = new arraylist<user>();          // create search controls         searchcontrols searchctls = new searchcontrols();          // specify search scope         searchctls.setsearchscope( searchcontrols.subtree_scope );          // specify attributes return         string returnedatts[] = { member_field };          searchctls.setreturningattributes( returnedatts );          // specify ldap search filter         string searchfilter = "(&(objectclass=group)(cn=" + groupname + "))";          // search objects using filter         namingenumeration<searchresult> answer = ctxmap.get( configmap.get( group ) ).search( configmap.get( searchbase ), searchfilter,                 searchctls );          searchresult sr = null;           // loop through search results         while ( answer.hasmoreelements() ) {             sr = (searchresult) answer.next();         }         if ( sr == null  ) {             return group;         }          // create attribute memberof         javax.naming.directory.attribute member = sr.getattributes().get( member_field );          // enumeration of elements in memberof         namingenumeration<?> ne = member.getall();           // loop though enumeration, cut unwanted characters , add         // elements user list         while ( ne.hasmoreelements() ) {             ...         }      } 

so want pass group's distinguished name parameter function instead of group's name , have search made on or attributes directly. possible?

ps: code used members of group.

thank you

you don't need search if have dn. up, lookup().