165             urlScope = url.getScope();
 166             urlFilter = url.getFilter();
 167 
 168         } catch (NamingException e) {
 169             // Not an LDAP URL; use original URL
 170             urlString = referral;
 171             urlAttrs = urlScope = urlFilter = null;
 172         }
 173 
 174         // reuse original name if URL DN is absent
 175         if (urlString == null) {
 176             urlString = nextName;
 177         } else {
 178             // concatenate with remaining name if URL DN is present
 179             urlString = "";
 180         }
 181 
 182         if (urlString == null) {
 183             urlName = null;
 184         } else {
 185             urlName = urlString.equals("") ? new CompositeName() :
 186                 new CompositeName().add(urlString);
 187         }
 188     }
 189 
 190 
 191     public void close() throws NamingException {
 192         if (refCtx != null) {
 193             refCtx.close();
 194             refCtx = null;
 195         }
 196         refEx = null;
 197     }
 198 
 199     void setHopCount(int hopCount) {
 200         this.hopCount = hopCount;
 201         if ((refCtx != null) && (refCtx instanceof LdapCtx)) {
 202             ((LdapCtx)refCtx).setHopCount(hopCount);
 203         }
 204     }
 205 

 871                 "Referral context not an instance of LdapContext");
 872         }
 873         return ((LdapContext)refCtx).getRequestControls();
 874     }
 875 
 876     public Control[] getResponseControls() throws NamingException {
 877         if (skipThisReferral) {
 878             throw (NamingException)
 879                 ((refEx.appendUnprocessedReferrals(null)).fillInStackTrace());
 880         }
 881 
 882         if (!(refCtx instanceof LdapContext)) {
 883             throw new NotContextException(
 884                 "Referral context not an instance of LdapContext");
 885         }
 886         return ((LdapContext)refCtx).getResponseControls();
 887     }
 888 
 889     // ---------------------- Private methods  ---------------------
 890     private Name toName(String name) throws InvalidNameException {
 891         return name.equals("") ? new CompositeName() :
 892             new CompositeName().add(name);
 893     }
 894 
 895     /*
 896      * Use the DN component from the LDAP URL (if present) to override the
 897      * supplied DN.
 898      */
 899     private Name overrideName(Name name) throws InvalidNameException {
 900         return (urlName == null ? name : urlName);
 901     }
 902 
 903     /*
 904      * Use the attributes and scope components from the LDAP URL (if present)
 905      * to override the corresponding components supplied in SearchControls.
 906      */
 907     private SearchControls overrideAttributesAndScope(SearchControls cons) {
 908         SearchControls urlCons;
 909 
 910         if ((urlScope != null) || (urlAttrs != null)) {
 911             urlCons = new SearchControls(cons.getSearchScope(),

 165             urlScope = url.getScope();
 166             urlFilter = url.getFilter();
 167 
 168         } catch (NamingException e) {
 169             // Not an LDAP URL; use original URL
 170             urlString = referral;
 171             urlAttrs = urlScope = urlFilter = null;
 172         }
 173 
 174         // reuse original name if URL DN is absent
 175         if (urlString == null) {
 176             urlString = nextName;
 177         } else {
 178             // concatenate with remaining name if URL DN is present
 179             urlString = "";
 180         }
 181 
 182         if (urlString == null) {
 183             urlName = null;
 184         } else {
 185             urlName = urlString.isEmpty() ? new CompositeName() :
 186                 new CompositeName().add(urlString);
 187         }
 188     }
 189 
 190 
 191     public void close() throws NamingException {
 192         if (refCtx != null) {
 193             refCtx.close();
 194             refCtx = null;
 195         }
 196         refEx = null;
 197     }
 198 
 199     void setHopCount(int hopCount) {
 200         this.hopCount = hopCount;
 201         if ((refCtx != null) && (refCtx instanceof LdapCtx)) {
 202             ((LdapCtx)refCtx).setHopCount(hopCount);
 203         }
 204     }
 205 

 871                 "Referral context not an instance of LdapContext");
 872         }
 873         return ((LdapContext)refCtx).getRequestControls();
 874     }
 875 
 876     public Control[] getResponseControls() throws NamingException {
 877         if (skipThisReferral) {
 878             throw (NamingException)
 879                 ((refEx.appendUnprocessedReferrals(null)).fillInStackTrace());
 880         }
 881 
 882         if (!(refCtx instanceof LdapContext)) {
 883             throw new NotContextException(
 884                 "Referral context not an instance of LdapContext");
 885         }
 886         return ((LdapContext)refCtx).getResponseControls();
 887     }
 888 
 889     // ---------------------- Private methods  ---------------------
 890     private Name toName(String name) throws InvalidNameException {
 891         return name.isEmpty() ? new CompositeName() :
 892             new CompositeName().add(name);
 893     }
 894 
 895     /*
 896      * Use the DN component from the LDAP URL (if present) to override the
 897      * supplied DN.
 898      */
 899     private Name overrideName(Name name) throws InvalidNameException {
 900         return (urlName == null ? name : urlName);
 901     }
 902 
 903     /*
 904      * Use the attributes and scope components from the LDAP URL (if present)
 905      * to override the corresponding components supplied in SearchControls.
 906      */
 907     private SearchControls overrideAttributesAndScope(SearchControls cons) {
 908         SearchControls urlCons;
 909 
 910         if ((urlScope != null) || (urlAttrs != null)) {
 911             urlCons = new SearchControls(cons.getSearchScope(),