/*******************************************************************************

 * Novell:$

 * Copyright (c) 20010 Novell, Inc. All Rights Reserved.

 *

 * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND

 * TREATIES. USE AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO THE LICENSE

 * AGREEMENT ACCOMPANYING THE SOFTWARE DEVELOPMENT KIT (SDK) THAT CONTAINS

 * THIS WORK. PURSUANT TO THE SDK LICENSE AGREEMENT, NOVELL HEREBY GRANTS TO

 * DEVELOPER A ROYALTY-FREE, NON-EXCLUSIVE LICENSE TO INCLUDE NOVELL'S SAMPLE

 * CODE IN ITS PRODUCT. NOVELL GRANTS DEVELOPER WORLDWIDE DISTRIBUTION RIGHTS

 * TO MARKET, DISTRIBUTE, OR SELL NOVELL'S SAMPLE CODE AS A COMPONENT OF

 * DEVELOPER'S PRODUCTS. NOVELL SHALL HAVE NO OBLIGATIONS TO DEVELOPER OR

 * DEVELOPER'S CUSTOMERS WITH RESPECT TO THIS CODE.

 *

 * $name:         SortControl.java 

 * $description:  SortControl.java demonstrates how to use the server

 *                server side control with Synchronous search requests.

 *                The program is hard coded to sort based on the common name

 *                attribute, and it searches for all objects at the specified

 *                searchBase.

 *

 *                Note that Novell eDirectory does not support multiple

 *                sort keys at this time.

 ******************************************************************************/

import java.util.Enumeration; 

import java.util.Iterator; 

import com.novell.ldap.*;

import com.novell.ldap.controls.*;

import java.io.UnsupportedEncodingException;



public class SortControl {



    public static void main( String[] args ) {     

        

        if (args.length != 4) {

            System.err.println("Usage:   java SortControl <host name> " 

                                       + "<login dn> <password> <container>");

            System.err.println("Example: java SortControl Acme.com \"cn=admin," 

                               +"o=Acme\" secret \"ou=Sales,o=Acme\"");

            System.exit(1);

        }

           

       // Read command line arguments  


        String ldapHost    = args[0];       

        String loginDN     = args[1];

        String password    = args[2];

        String searchBase  = args[3];

        String         returnedAttributes[] = {"*", "+"};

        String         oid;

        boolean        attributeOnly = false;

        boolean        isSupported   = false;

        int    ldapPort    = LDAPConnection.DEFAULT_PORT;

        int    ldapVersion = LDAPConnection.LDAP_V3;

        String searchFilter= "(objectclass=*)";

        LDAPConnection lc  = new LDAPConnection();



        try {                     



           // connect to the server


            lc.connect( ldapHost, ldapPort );

           // bind to the server


            lc.bind( ldapVersion, loginDN, password.getBytes("UTF8") );

                       

            /* To search for root DSE,

             *    1. Set LDAP version to LDAP_V3 before binding

             *    2. Set the search base to an empty string

             *    3. Set the search filter to (objectclass=*)

             *    4. Set the search scope to LDAP_SCOPE_BASE

             */



             LDAPSearchResults searchResults = lc.search(

                                         "",

                                         LDAPConnection.SCOPE_BASE,

                                         "(objectclass=*)",

                                         returnedAttributes,

                                         attributeOnly     );



             /*  The search returns one entry in the search results, and

              *  it is the root DSE.

              */



             LDAPEntry entry = null;



             try {

                 entry = searchResults.next();

             }

             catch(LDAPException e) {

                 System.out.println("Error: " + e.toString());

             }

 

             LDAPAttributeSet attributeSet = entry.getAttributeSet();

             Iterator allAttributes = attributeSet.iterator();



             while(allAttributes.hasNext()) {

                 LDAPAttribute attribute = (LDAPAttribute)allAttributes.next();

                 String attrName = attribute.getName();

                 Enumeration allValues = attribute.getStringValues();



                 if( allValues != null) {

                     while(allValues.hasMoreElements()) {

                         if (attrName.equalsIgnoreCase("supportedControl")) {

                            oid = (String) allValues.nextElement();

                            

                           // Check whether the requested server supports the Sort Control


                           // Set to true if it is supported.


                            if(oid.equalsIgnoreCase("1.2.840.113556.1.4.473")

                             ||oid.equalsIgnoreCase("1.2.840.113556.1.4.474"))

                                isSupported = true;

                         }

                         else 

                             allValues.nextElement();                         

                     }

                 }

             }

             

            //Proceed if the Sort Control is supported.


             if(isSupported == true) {

                 

                //  Results of the search only include sn


                 String[] attrs = new String[1];            

                 attrs[0] = "sn";



                // The results should be sorted using the cn attribute


                 LDAPSortKey[] keys = new LDAPSortKey[1];

                 keys[0] = new LDAPSortKey( "sn" );

          

                // Create a LDAPSortControl object - Fail if cannot sort


                 LDAPSortControl sort = new LDAPSortControl( keys, true );

            

                // Set the Sort control to be sent as part of search request


                 LDAPSearchConstraints cons = lc.getSearchConstraints();

                 cons.setControls( sort );

                 lc.setConstraints(cons);



                // Perform the search - SYNCHRONOUS SEARCH USED HERE


                 System.out.println( "\nCalling search request...");

                 LDAPSearchResults res = lc.search( 

                                             searchBase,

                                             LDAPConnection.SCOPE_SUB,

                                             searchFilter,

                                             attrs,// only return sn


                                             false,// and it's value


                                             (LDAPSearchConstraints) null );

  

                // Loop on results until finished


                 while ( res.hasMore() ) {



                    // Get next directory entry - this next object can 


                    // be an LDAPException if something went wrong


                     LDAPEntry nextEntry;

                     try {                

                         nextEntry = res.next();

                     }

                     catch(LDAPException e) {             

                         if ( e instanceof LDAPReferralException) 

                             continue;

                         else

                             break;

                     }

                                                                

                    // Print out the entry DN


                     System.out.println();

                     System.out.println( "Entry dn: " + nextEntry.getDN() );



                    // Get the attributes of the entry


                     LDAPAttributeSet findAttrs = nextEntry.getAttributeSet();

                  

                     Iterator enumAttrs = findAttrs.iterator();

                     System.out.println( "Attribute(s):" );



                    // Loop on attributes


                     while ( enumAttrs.hasNext() ) {

                         LDAPAttribute anAttr = (

                                            LDAPAttribute)enumAttrs.next();

                    

                        // get attribute name


                         String attrName = anAttr.getName();                   

                    

                        // get attribute value


                         Enumeration enumVals = anAttr.getStringValues();

                         while ( enumVals.hasMoreElements() ) {

                             String aVal = ( String )enumVals.nextElement();

                            // print out attribute name and value 


                             System.out.println( "    " + attrName + ": " + aVal );

                         }

                     }

                 }



                // Server should send back a control irrespective 


                // of the status of the search request


                 LDAPControl[] controls = res.getResponseControls();

                 if ( controls != null ) {

                

                    // Theoritically we could have multiple controls returned


                     for( int i = 0; i < controls.length; i++ ) {

                    

                        // We are looking for the LDAPSortResponse Control class - 


                        // the control sent back in response to LDAPSortControl


                         if ( controls[i] instanceof LDAPSortResponse ) {

                        

                             System.out.println("Received LDAP Sort Control from " 

                                                                  + "server");

                        

                            // We must have an error code and maybe a string 


                            // identifying erring attribute in the response control.


                             String bad = 

                                 ((LDAPSortResponse)controls[i]).getFailedAttribute();

                             int result = 

                                 ((LDAPSortResponse)controls[i]).getResultCode();

                      

                            // Print out error ccode (0 if no error) and any 


                            // returned attribute


                             System.out.println( "Error code: " + result );

                             if ( bad != null )

                                 System.out.println( "Offending " + "attribute: " 

                                                                  + bad );

                             else

                                 System.out.println( "No offending " + "attribute " 

                                                                     + "returned" );

                             }

                     }

                 }

           

                // All done - disconnect


                 if ( lc.isConnected() )

                     lc.disconnect();



             } 

            //Print message if the Sort Control is not supported.


             else {

                 System.out.println("The Requested Server does not support the Sort Control.");

                 lc.disconnect();

                 System.exit(1);

             }

             

        }catch( LDAPException e ) {

                 System.out.println( e.toString() );

        }

        catch( UnsupportedEncodingException e ) {

              System.out.println( "Error: " + e.toString() );

        }

        

    }

}