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//
// Novell.Directory.Ldap.Utilclass.IntermediateResponseFactory.cs
//
// Author:
//   Anil Bhatia (banil@novell.com)
//
// (C) 2003 Novell, Inc (http://www.novell.com)
//

using System;
using System.Reflection;

using Novell.Directory.Ldap;
using Novell.Directory.Ldap.Rfc2251;

namespace Novell.Directory.Ldap.Utilclass
{
  /// <summary>
  ///
  /// Takes an LDAPIntermediateResponse and returns an object
  /// (that implements the base class LDAPIntermediateResponse)
  ///  based on the OID.
  ///
  ///  You can then call methods defined in the child
  ///  class to parse the contents of the response.  The methods available
  ///  depend on the child class. All child classes inherit from the
  ///  LdapIntermediateResponse.
  ///
  /// </summary>
public class IntermediateResponseFactory 
{

    /**
     * Used to Convert an RfcLDAPMessage object to the appropriate
     * LDAPIntermediateResponse object depending on the operation being performed.
     *
     * @param inResponse   The LDAPIntermediateResponse object as returned by the
     *                     extendedOperation method in the LDAPConnection object.
     * <br><br>
     * @return An object of base class LDAPIntermediateResponse.  The actual child
     *         class of this returned object depends on the operation being
     *         performed.
     *
     * @exception LDAPException A general exception which includes an error message
     *                          and an LDAP error code.
     */

    static public LdapIntermediateResponse convertToIntermediateResponse(RfcLdapMessage inResponse)
      //          throws LDAPException 
  {
        
        LdapIntermediateResponse tempResponse = new LdapIntermediateResponse(inResponse);
        // Get the oid stored in the Extended response
        String inOID = tempResponse.getID();

        RespExtensionSet regExtResponses = 
                                LdapIntermediateResponse.getRegisteredResponses();
        try{
            Type extRespClass = regExtResponses.findResponseExtension(inOID);            
            if ( extRespClass == null ){
                return tempResponse;
            }
            
            Type[] argsClass = new Type[]{typeof(RfcLdapMessage)};
            Object[] args = { inResponse };
            Exception ex;
            try{
                ConstructorInfo extConstructor = extRespClass.GetConstructor(argsClass);

                try{
                    Object resp = null;
                    resp = extConstructor.Invoke(args);
                    return (LdapIntermediateResponse) resp;
                } catch (UnauthorizedAccessException e) {
                    ex = e;
                } catch (TargetInvocationException e) {
                    ex = e;
                }
            } catch (MissingMethodException e) {
                // bad class was specified, fall through and return a
                // default  LDAPIntermediateResponse object
                ex = e;
            }
        } catch (MissingFieldException e) {
            // No match with the OID
            // Do nothing. Fall through and construct a default LDAPControl object.

        }
        // If we get here we did not have a registered extendedresponse
        // for this oid.  Return a default LDAPIntermediateResponse object.
        return tempResponse;
    }

}

}