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

 * $Novell: VLVControl.java,v 1.19 2005/07/07 09:45:12 $

 *

 * Copyright (C) 2001 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. 

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

import java.util.Enumeration; 

import java.util.Iterator; 

import com.novell.ldap.*;

import com.novell.ldap.controls.*;

import java.io.UnsupportedEncodingException;



/**

 *  The following sample demonstrates how to use the VLV

 *  control with Synchronous search requests.  As required a 

 *  Server Side Sort Control is also included in the request.

 * 

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

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

 *  searchBase.

 * 

 *  Usage: Usage: java VLVControl <host name> <login dn> <password> 

 * <searchBase>

 *

 */

public class VLVControl {



    public static void main( String[] args ) {     

        

        /* Check if we have the correct number of command line arguments */

        if (args.length != 4) {

            System.err.println("Usage:   java VLVControl <host name> <login dn>" 

                                                 + " <password> <container>");

            System.err.println(

                  "Example: java VLVControl Acme.com \"cn=admin,o=Acme\" secret"

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

            System.exit(1);

        }

           

        /* Parse the 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;

        LDAPConnection lc   = new LDAPConnection();



        try {

           // connect to the server


            lc.connect( ldapHost, ldapPort );

           // bind to the server


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

            System.out.println( "Succesfully logged in to server: " + ldapHost);



            /* 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 VLV Control


                           // Set to true if it is supported.


                            if(oid.equalsIgnoreCase("2.16.840.1.113730.3.4.9")

                             ||oid.equalsIgnoreCase("2.16.840.1.113730.3.4.10"))

                                isSupported = true;

                         }

                         else 

                             allValues.nextElement();

                     }

                 }

             }

            

            // Proceed if the Sort Control is supported.


             if(isSupported == true) { 

            

                    /* Set default filter - Change this line if you need a different set

                     * of search restrictions. Read the "NDS and LDAP Integration Guide"

                     * for information on support by Novell eDirectory of this

                     * functionaliry.

                     */

                    String MY_FILTER = "cn=*";



                    /* We are requesting that the givenname and cn fields for each 

                     * object be returned

                     */

                    String[] attrs = new String[2];

                    attrs[0] = "givenname";

                    attrs[1] = "cn";

                

                   // We will be sending two controls to the server 


                    LDAPControl requestControls[] = new LDAPControl[2];

                

                    /* Create the sort key to be used by the sort control 

                     * Results should be sorted based on the cn attribute. 

                     * See the "NDS and LDAP Integration Guide" for information on

                     * Novell eDirectory support of this functionaliry.

                     */

                    LDAPSortKey[] keys = new LDAPSortKey[1];

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



                   // Create the sort control 


                    requestControls[0] = new LDAPSortControl( keys, true );



                    /* Create the VLV Control.

                     * These two fields in the VLV Control identify the before and 

                     * after count of entries to be returned 

                     */

                    int beforeCount = 0;

                    int afterCount  = 2;



                    /* The VLV control request can specify the index

                     * using one of the two methods described below:

                     * 

                     * TYPED INDEX: Here we request all objects that have cn greater

                     * than or equal to the letter "a" 

                     */

                    requestControls[1] = 

                            new LDAPVirtualListControl("a", beforeCount, afterCount);

                

                    /* The following code needs to be enabled to specify the index 

                     * directly 

                     *   int offset = 0; - offset of the index

                     *   int contentCount = 3; - our estimate of the search result size

                     *   requestControls[1] = new LDAPVirtualListControl(offset, 

                     *                          beforeCount, afterCount, contentCount);

                     */



                   // Set the controls to be sent as part of search request


                    LDAPSearchConstraints cons = lc.getSearchConstraints();

                    cons.setControls( requestControls );

                    lc.setConstraints(cons);



                   // Send the search request - Synchronous Search is being used here 


                    System.out.println( "Calling Asynchronous Search...");

                    LDAPSearchResults res = lc.search( searchBase,

                                                     LDAPConnection.SCOPE_SUB,

                                                     MY_FILTER,

                                                     attrs,

                                                     false,

                                                     (LDAPSearchConstraints) null );

      

                   // Loop through the results and print them out


                    while ( res.hasMore() ) {



                        /* Get next returned entry.  Note that we should expect a LDAP-

                         *Exception object as well just in case something goes wrong

                         */

                        LDAPEntry nextEntry;

                        try {                

                            nextEntry = res.next();

                        }

                        catch(LDAPException e) {             

                            if ( e instanceof LDAPReferralException) 

                                continue;

                            else {

                                System.out.println("Search stopped with exception " +

                                        e.toString());

                                break;

                            }

                        }

                    

                        /* Print out the returned Entries distinguished name.  */

                        System.out.println();

                        System.out.println( nextEntry.getDN() );



                        /* Get the list of attributes for the current entry */

                        LDAPAttributeSet findAttrs = nextEntry.getAttributeSet();

                      

                        /* Convert attribute list to Enumeration */

                        Iterator enumAttrs = findAttrs.iterator();

                        System.out.println( "Attributes: " );



                        /* Loop through all attributes in the enumeration */

                        while ( enumAttrs.hasNext() ) {

                        

                            LDAPAttribute anAttr = 

                                            (LDAPAttribute)enumAttrs.next();

                        

                            /* Print out the attribute name */

                            String attrName = anAttr.getName();

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

                        

                           // Loop through all values for this attribute and print them


                            Enumeration enumVals = anAttr.getStringValues();

                            while ( enumVals.hasMoreElements() ) {

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

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

                            }

                        }

                    }



                   // Server should send back a control irrespective of the 


                   // status of the search request


                    LDAPControl[] controls = res.getResponseControls();

                    if ( controls == null ) {

                        System.out.println( "No controls returned" );

                    } else {

                    

                       // We are likely to have multiple controls returned 


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

                        

                            /* Is this the Sort Response Control. */

                            if ( controls[i] instanceof LDAPSortResponse ) {

                            

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

                                                    + "Server");

                                

                                /* We could 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 code (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" );

                            }



                            /* Is this a VLV Response Control */

                            if ( controls[i] instanceof LDAPVirtualListResponse ) {

                            

                                System.out.println("Received VLV Response Control from " 

                                                                         + "Server...");

                            

                                /* Get all returned fields */

                                int firstPosition = ((LDAPVirtualListResponse)

                                                        controls[i]).getFirstPosition();

                                int ContentCount = ((LDAPVirtualListResponse)

                                                        controls[i]).getContentCount();

                                int resultCode = ((LDAPVirtualListResponse)

                                                        controls[i]).getResultCode();

                                String context = ((LDAPVirtualListResponse)

                                                        controls[i]).getContext();



                          

                                /* Print out the returned fields.  Typically you would 

                                 * have used these fields to reissue another VLV request

                               * or to display the list on a GUI 

                               */

                                System.out.println( "Result Code    => " 

                                                                    + resultCode );

                                System.out.println( "First Position => " 

                                                                    + firstPosition );

                                System.out.println( "Content Count  => " 

                                                                    + ContentCount );

                                if ( context != null )

                                    System.out.println( "Context String => "+ context );

                                else

                                    System.out.println( "No Context String in returned" 

                                                                    + " control" );

                            }



                        }

                    }

          

                    /* We are 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 VLV Control.");

                lc.disconnect();

                System.exit(1);

             }            

        }

        catch( LDAPException e ) {

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

        }

        catch( UnsupportedEncodingException e ) {

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

        }

    }

}