/*
    *  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
    *  
   *    https://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.api.ldap.codec.actions.request.modify;
  
  
  import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
  import org.apache.directory.api.asn1.ber.tlv.TLV;
  import org.apache.directory.api.i18n.I18n;
  import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
  import org.apache.directory.api.ldap.model.entry.Attribute;
  import org.apache.directory.api.ldap.model.exception.LdapException;
  import org.apache.directory.api.ldap.model.message.ModifyRequest;
  import org.apache.directory.api.util.Strings;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * The action used to store a Value to an modifyRequest
   * 
   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
   */
  public class StoreModifyRequestAttributeValue extends GrammarAction<LdapMessageContainer<ModifyRequest>>
  {
      /** The logger */
      private static final Logger LOG = LoggerFactory.getLogger( StoreModifyRequestAttributeValue.class );
  
      /**
       * Instantiates a new modify attribute value action.
       */
      public StoreModifyRequestAttributeValue()
      {
          super( "Stores AttributeValue" );
      }
  
  
      /**
       * {@inheritDoc}
       */
      @Override
      public void action( LdapMessageContainer<ModifyRequest> container )
      {
          TLV tlv = container.getCurrentTLV();
  
          // Store the value. It can't be null
          byte[] value = Strings.EMPTY_BYTES;
          Attribute currentAttribute = container.getCurrentAttribute();
  
          try
          {
              if ( tlv.getLength() == 0 )
              {
                  currentAttribute.add( "" );
              }
              else
              {
                  value = tlv.getValue().getData();
  
                  if ( container.isBinary( currentAttribute.getId() ) )
                  {
                      container.getCurrentAttribute().add( value );
                  }
                  else
                  {
                      currentAttribute.add( Strings.utf8ToString( ( byte[] ) value ) );
                  }
              }
          }
          catch ( LdapException le )
          {
              // Just swallow the exception, it can't occur here
          }
  
          // We can have an END transition
          container.setGrammarEndAllowed( true );
  
          if ( LOG.isDebugEnabled() )
          {
              LOG.debug( I18n.msg( I18n.MSG_05131_VALUE_MODIFIED, value ) );
          }
      }
  }