/*
    *   Licensed to the Apache Software Foundation (ASF) under one
    *   or more contributor license agreements.  See the NOTICE file
    *   distributed with this work for additional information
    *   regarding copyright ownership.  The ASF licenses this file
    *   to you under the Apache License, Version 2.0 (the
    *   "License"); you may not use this file except in compliance
    *   with the License.  You may obtain a copy of the License at
    *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   *   Unless required by applicable law or agreed to in writing,
   *   software distributed under the License is distributed on an
   *   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *   KIND, either express or implied.  See the License for the
   *   specific language governing permissions and limitations
   *   under the License.
   *
   */
  package org.apache.directory.ldap.client.api;
  
  
  import static org.apache.directory.api.ldap.model.message.ResultCodeEnum.processResponse;
  
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.directory.api.ldap.codec.api.LdapApiService;
  import org.apache.directory.api.ldap.codec.api.LdapApiServiceFactory;
  import org.apache.directory.api.ldap.model.exception.LdapException;
  import org.apache.directory.api.ldap.model.message.BindRequest;
  import org.apache.directory.api.ldap.model.message.BindRequestImpl;
  import org.apache.directory.api.ldap.model.message.BindResponse;
  import org.apache.directory.api.ldap.model.message.Control;
  import org.apache.directory.api.ldap.model.name.Dn;
  import org.apache.directory.api.ldap.model.schema.SchemaManager;
  import org.apache.directory.api.util.Strings;
  import org.apache.mina.core.service.IoHandlerAdapter;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * An abstract LdapConnection class gathering the common behavior of LdapConnection
   * concrete classes.
   * 
   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
   */
  public abstract class AbstractLdapConnection extends IoHandlerAdapter implements LdapConnection
  {
      /** logger for reporting errors that might not be handled properly upstream */
      private static final Logger LOG = LoggerFactory.getLogger( AbstractLdapConnection.class );
  
      /** the schema manager */
      protected SchemaManager schemaManager;
  
      /** A Message ID which is incremented for each operation */
      protected AtomicInteger messageId;
  
      /** the ldap codec service */
      protected LdapApiService codec;
  
  
      /**
       * Creates a new instance of an AbstractLdapConnection
       */
      protected AbstractLdapConnection()
      {
          this( LdapApiServiceFactory.getSingleton() );
      }
  
      protected AbstractLdapConnection( LdapApiService codec )
      {
          messageId = new AtomicInteger( 0 );
          this.codec = codec;
      }
  
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void bind( Dn name ) throws LdapException
      {
          byte[] credBytes = Strings.EMPTY_BYTES;
  
          BindRequest bindRequest = new BindRequestImpl();
          bindRequest.setDn( name );
          bindRequest.setCredentials( credBytes );
  
          BindResponse bindResponse = bind( bindRequest );
  
          processResponse( bindResponse );
      }
  
  
      /**
       * {@inheritDoc}
       */
      @Override
     public void bind( String name ) throws LdapException
     {
         LOG.debug( "Bind request : {}", name );
 
         bind( new Dn( schemaManager, name ), null );
     }
 
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void bind( String name, String credentials ) throws LdapException
     {
         bind( new Dn( schemaManager, name ), credentials );
     }
 
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void bind( Dn name, String credentials ) throws LdapException
     {
         byte[] credBytes = credentials == null ? Strings.EMPTY_BYTES : Strings.getBytesUtf8( credentials );
 
         BindRequest bindRequest = new BindRequestImpl();
         bindRequest.setDn( name );
         bindRequest.setCredentials( credBytes );
 
         BindResponse bindResponse = bind( bindRequest );
 
         processResponse( bindResponse );
     }
 
 
     /**
      * Create a complete BindRequest ready to be sent.
      *
      * @param name The DN to bind with
      * @param credentials The user's password
      * @param saslMechanism The SASL mechanism to use
      * @param controls The controls to send
      * @return The created BindRequest
      * @throws LdapException If the creation failed
      */
     protected BindRequest createBindRequest( String name, byte[] credentials, String saslMechanism, Control... controls )
         throws LdapException
     {
         // Set the new messageId
         BindRequest bindRequest = new BindRequestImpl();
 
         // Set the version
         bindRequest.setVersion3( true );
 
         // Set the name
         bindRequest.setName( name );
 
         // Set the credentials
         if ( Strings.isEmpty( saslMechanism ) )
         {
             // Simple bind
             bindRequest.setSimple( true );
             bindRequest.setCredentials( credentials );
         }
         else
         {
             // SASL bind
             bindRequest.setSimple( false );
             bindRequest.setCredentials( credentials );
             bindRequest.setSaslMechanism( saslMechanism );
         }
 
         // Add the controls
         if ( ( controls != null ) && ( controls.length != 0 ) )
         {
             bindRequest.addAllControls( controls );
         }
 
         return bindRequest;
     }
 }