@@ -75,23 +75,15 @@ protected LdapUser createUser(final SearchResult result, Long domainId) throws N
7575    }
7676
7777    private  String  generateSearchFilter (final  String  username , Long  domainId ) {
78-         final  StringBuilder  userObjectFilter  = new  StringBuilder ();
79-         userObjectFilter .append ("(objectClass=" );
80-         userObjectFilter .append (_ldapConfiguration .getUserObject (domainId ));
81-         userObjectFilter .append (")" );
78+         final  StringBuilder  userObjectFilter  = getUserObjectFilter (domainId );
8279
83-         final  StringBuilder  usernameFilter  = new  StringBuilder ();
84-         usernameFilter .append ("(" );
85-         usernameFilter .append (_ldapConfiguration .getUsernameAttribute (domainId ));
86-         usernameFilter .append ("=" );
87-         usernameFilter .append ((username  == null  ? "*"  : LdapUtils .escapeLDAPSearchFilter (username )));
88-         usernameFilter .append (")" );
80+         final  StringBuilder  usernameFilter  = getUsernameFilter (username , domainId );
8981
9082        String  memberOfAttribute  = getMemberOfAttribute (domainId );
9183        StringBuilder  ldapGroupsFilter  = new  StringBuilder ();
9284        // this should get the trustmaps for this domain 
9385        List <String > ldapGroups  = getMappedLdapGroups (domainId );
94-         if  (null  !=  ldapGroups  &&  ldapGroups . size () >  0 ) {
86+         if  (! ldapGroups . isEmpty () ) {
9587            ldapGroupsFilter .append ("(|" );
9688            for  (String  ldapGroup  : ldapGroups ) {
9789                ldapGroupsFilter .append (getMemberOfGroupString (ldapGroup , memberOfAttribute ));
@@ -104,21 +96,35 @@ private String generateSearchFilter(final String username, Long domainId) {
10496        if  (null  != pricipleGroup ) {
10597            principleGroupFilter .append (getMemberOfGroupString (pricipleGroup , memberOfAttribute ));
10698        }
107-         final  StringBuilder  result  = new  StringBuilder ();
108-         result .append ("(&" );
109-         result .append (userObjectFilter );
110-         result .append (usernameFilter );
111-         result .append (ldapGroupsFilter );
112-         result .append (principleGroupFilter );
113-         result .append (")" );
114- 
115-         String  returnString  = result .toString ();
116-         if  (logger .isTraceEnabled ()) {
117-             logger .trace ("constructed ldap query: "  + returnString );
118-         }
99+ 
100+         String  returnString  = "(&"  +
101+                 userObjectFilter  +
102+                 usernameFilter  +
103+                 ldapGroupsFilter  +
104+                 principleGroupFilter  +
105+                 ")" ;
106+         logger .trace ("constructed ldap query: {}" , returnString );
119107        return  returnString ;
120108    }
121109
110+     private  StringBuilder  getUsernameFilter (String  username , Long  domainId ) {
111+         final  StringBuilder  usernameFilter  = new  StringBuilder ();
112+         usernameFilter .append ("(" );
113+         usernameFilter .append (_ldapConfiguration .getUsernameAttribute (domainId ));
114+         usernameFilter .append ("=" );
115+         usernameFilter .append ((username  == null  ? "*"  : LdapUtils .escapeLDAPSearchFilter (username )));
116+         usernameFilter .append (")" );
117+         return  usernameFilter ;
118+     }
119+ 
120+     StringBuilder  getUserObjectFilter (Long  domainId ) {
121+         final  StringBuilder  userObjectFilter  = new  StringBuilder ();
122+         userObjectFilter .append ("(objectClass=" );
123+         userObjectFilter .append (_ldapConfiguration .getUserObject (domainId ));
124+         userObjectFilter .append (")" );
125+         return  userObjectFilter ;
126+     }
127+ 
122128    private  List <String > getMappedLdapGroups (Long  domainId ) {
123129        List  <String > ldapGroups  = new  ArrayList <>();
124130        // first get the trustmaps 
@@ -134,37 +140,31 @@ private List<String> getMappedLdapGroups(Long domainId) {
134140    private  String  getMemberOfGroupString (String  group , String  memberOfAttribute ) {
135141        final  StringBuilder  memberOfFilter  = new  StringBuilder ();
136142        if  (null  != group ) {
137-             if (logger .isDebugEnabled ()) {
138-                 logger .debug ("adding search filter for '"  + group  +
139-                 "', using '"  + memberOfAttribute  + "'" );
140-             }
141-             memberOfFilter .append ("("  + memberOfAttribute  + "=" );
142-             memberOfFilter .append (group );
143-             memberOfFilter .append (")" );
143+             logger .debug ("adding search filter for '{}', using '{}'" , group , memberOfAttribute );
144+             memberOfFilter .append ("(" )
145+                     .append (memberOfAttribute )
146+                     .append ("=" )
147+                     .append (group )
148+                     .append (")" );
144149        }
145150        return  memberOfFilter .toString ();
146151    }
147152
148153    private  String  generateGroupSearchFilter (final  String  groupName , Long  domainId ) {
149-         final  StringBuilder  groupObjectFilter  = new  StringBuilder ();
150-         groupObjectFilter .append ("(objectClass=" );
151-         groupObjectFilter .append (_ldapConfiguration .getGroupObject (domainId ));
152-         groupObjectFilter .append (")" );
153- 
154-         final  StringBuilder  groupNameFilter  = new  StringBuilder ();
155-         groupNameFilter .append ("(" );
156-         groupNameFilter .append (_ldapConfiguration .getCommonNameAttribute ());
157-         groupNameFilter .append ("=" );
158-         groupNameFilter .append ((groupName  == null  ? "*"  : LdapUtils .escapeLDAPSearchFilter (groupName )));
159-         groupNameFilter .append (")" );
160- 
161-         final  StringBuilder  result  = new  StringBuilder ();
162-         result .append ("(&" );
163-         result .append (groupObjectFilter );
164-         result .append (groupNameFilter );
165-         result .append (")" );
166- 
167-         return  result .toString ();
154+         String  groupObjectFilter  = "(objectClass="  +
155+                 _ldapConfiguration .getGroupObject (domainId ) +
156+                 ")" ;
157+ 
158+         String  groupNameFilter  = "("  +
159+                 _ldapConfiguration .getCommonNameAttribute () +
160+                 "="  +
161+                 (groupName  == null  ? "*"  : LdapUtils .escapeLDAPSearchFilter (groupName )) +
162+                 ")" ;
163+ 
164+         return  "(&"  +
165+                 groupObjectFilter  +
166+                 groupNameFilter  +
167+                 ")" ;
168168    }
169169
170170    @ Override 
@@ -186,17 +186,9 @@ public LdapUser getUser(final String username, final String type, final String n
186186            basedn  = _ldapConfiguration .getBaseDn (domainId );
187187        }
188188
189-         final  StringBuilder  userObjectFilter  = new  StringBuilder ();
190-         userObjectFilter .append ("(objectClass=" );
191-         userObjectFilter .append (_ldapConfiguration .getUserObject (domainId ));
192-         userObjectFilter .append (")" );
189+         final  StringBuilder  userObjectFilter  = getUserObjectFilter (domainId );
193190
194-         final  StringBuilder  usernameFilter  = new  StringBuilder ();
195-         usernameFilter .append ("(" );
196-         usernameFilter .append (_ldapConfiguration .getUsernameAttribute (domainId ));
197-         usernameFilter .append ("=" );
198-         usernameFilter .append ((username  == null  ? "*"  : LdapUtils .escapeLDAPSearchFilter (username )));
199-         usernameFilter .append (")" );
191+         final  StringBuilder  usernameFilter  = getUsernameFilter (username , domainId );
200192
201193        final  StringBuilder  memberOfFilter  = new  StringBuilder ();
202194        if  ("GROUP" .equals (type )) {
@@ -205,18 +197,17 @@ public LdapUser getUser(final String username, final String type, final String n
205197            memberOfFilter .append (")" );
206198        }
207199
208-         final  StringBuilder  searchQuery  = new  StringBuilder ();
209-         searchQuery .append ("(&" );
210-         searchQuery .append (userObjectFilter );
211-         searchQuery .append (usernameFilter );
212-         searchQuery .append (memberOfFilter );
213-         searchQuery .append (")" );
200+         String  searchQuery  = "(&"  +
201+                 userObjectFilter  +
202+                 usernameFilter  +
203+                 memberOfFilter  +
204+                 ")" ;
214205
215-         return  searchUser (basedn , searchQuery . toString () , context , domainId );
206+         return  searchUser (basedn , searchQuery , context , domainId );
216207    }
217208
218209    protected  String  getMemberOfAttribute (final  Long  domainId ) {
219-         return  _ldapConfiguration .getUserMemberOfAttribute (domainId );
210+         return  LdapConfiguration .getUserMemberOfAttribute (domainId );
220211    }
221212
222213    @ Override 
@@ -243,7 +234,7 @@ public List<LdapUser> getUsersInGroup(String groupName, LdapContext context, Lon
243234
244235        NamingEnumeration <SearchResult > result  = context .search (_ldapConfiguration .getBaseDn (domainId ), generateGroupSearchFilter (groupName , domainId ), controls );
245236
246-         final  List <LdapUser > users  = new  ArrayList <LdapUser >();
237+         final  List <LdapUser > users  = new  ArrayList <>();
247238        //Expecting only one result which has all the users 
248239        if  (result .hasMoreElements ()) {
249240            Attribute  attribute  = result .nextElement ().getAttributes ().get (attributeName );
@@ -254,7 +245,7 @@ public List<LdapUser> getUsersInGroup(String groupName, LdapContext context, Lon
254245                try {
255246                    users .add (getUserForDn (userdn , context , domainId ));
256247                } catch  (NamingException  e ){
257-                     logger .info ("Userdn: "   +  userdn  +  "  Not Found:: Exception message: "  +  e .getMessage ());
248+                     logger .info ("Userdn: {}  Not Found:: Exception message: {}"  ,  userdn ,  e .getMessage ());
258249                }
259250            }
260251        }
@@ -286,17 +277,15 @@ protected boolean isUserDisabled(SearchResult result) throws NamingException {
286277        return  false ;
287278    }
288279
289-     public  LdapUser  searchUser (final  String  basedn , final  String  searchString , final  LdapContext  context , Long  domainId ) throws  NamingException ,  IOException  {
280+     public  LdapUser  searchUser (final  String  basedn , final  String  searchString , final  LdapContext  context , Long  domainId ) throws  NamingException  {
290281        final  SearchControls  searchControls  = new  SearchControls ();
291282
292283        searchControls .setSearchScope (_ldapConfiguration .getScope ());
293284        searchControls .setReturningAttributes (_ldapConfiguration .getReturnAttributes (domainId ));
294285
295286        NamingEnumeration <SearchResult > results  = context .search (basedn , searchString , searchControls );
296-         if (logger .isDebugEnabled ()) {
297-             logger .debug ("searching user(s) with filter: \" "  + searchString  + "\" " );
298-         }
299-         final  List <LdapUser > users  = new  ArrayList <LdapUser >();
287+         logger .debug ("searching user(s) with filter: \" {}\" " , searchString );
288+         final  List <LdapUser > users  = new  ArrayList <>();
300289        while  (results .hasMoreElements ()) {
301290            final  SearchResult  result  = results .nextElement ();
302291                users .add (createUser (result , domainId ));
@@ -324,7 +313,7 @@ public List<LdapUser> searchUsers(final String username, final LdapContext conte
324313        byte [] cookie  = null ;
325314        int  pageSize  = _ldapConfiguration .getLdapPageSize (domainId );
326315        context .setRequestControls (new  Control []{new  PagedResultsControl (pageSize , Control .NONCRITICAL )});
327-         final  List <LdapUser > users  = new  ArrayList <LdapUser >();
316+         final  List <LdapUser > users  = new  ArrayList <>();
328317        NamingEnumeration <SearchResult > results ;
329318        do  {
330319            results  = context .search (basedn , generateSearchFilter (username , domainId ), searchControls );
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