/*
    *  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.shared.kerberos.codec.etypeInfo2Entry.actions;
  
  
  import org.apache.directory.api.asn1.DecoderException;
  import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
  import org.apache.directory.api.asn1.ber.tlv.BerValue;
  import org.apache.directory.api.asn1.ber.tlv.IntegerDecoder;
  import org.apache.directory.api.asn1.ber.tlv.IntegerDecoderException;
  import org.apache.directory.api.asn1.ber.tlv.TLV;
  import org.apache.directory.api.i18n.I18n;
  import org.apache.directory.api.util.Strings;
  import org.apache.directory.shared.kerberos.codec.etypeInfo2Entry.ETypeInfo2EntryContainer;
  import org.apache.directory.shared.kerberos.codec.types.EncryptionType;
  import org.apache.directory.shared.kerberos.components.ETypeInfo2Entry;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * The action used to store the ETYPE-INFO2-ENTRY etype
   *
   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
   */
  public class StoreEType extends GrammarAction<ETypeInfo2EntryContainer>
  {
      /** The logger */
      private static final Logger LOG = LoggerFactory.getLogger( StoreEType.class );
  
      /** Speedup for logs */
      private static final boolean IS_DEBUG = LOG.isDebugEnabled();
  
  
      /**
       * Instantiates a new StoreEType action.
       */
      public StoreEType()
      {
          super( "ETYPE-INFO2-ENTRY etype" );
      }
  
  
      /**
       * {@inheritDoc}
       */
      public void action( ETypeInfo2EntryContainer eTypeInfo2EntryContainer ) throws DecoderException
      {
          TLV tlv = eTypeInfo2EntryContainer.getCurrentTLV();
  
          // The Length should not be null
          if ( tlv.getLength() == 0 )
          {
              LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
  
              // This will generate a PROTOCOL_ERROR
              throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
          }
  
          // The etype is an integer
          BerValue value = tlv.getValue();
  
          EncryptionType etype = null;
          ETypeInfo2Entry etypeInfo2Entry = eTypeInfo2EntryContainer.getETypeInfo2Entry();
  
          try
          {
              int eType = IntegerDecoder.parse( value );
              etype = EncryptionType.getTypeByValue( eType );
  
              etypeInfo2Entry.setEType( etype );
  
              if ( IS_DEBUG )
              {
                  LOG.debug( "etype : {}", etype );
              }
  
              // The next tag is optional, we can end here
              eTypeInfo2EntryContainer.setGrammarEndAllowed( true );
          }
          catch ( IntegerDecoderException ide )
          {
             LOG.error( I18n.err( I18n.ERR_01310_INTEGER_DECODING_ERROR, Strings.dumpBytes( value.getData() ) ) );
 
             // This will generate a PROTOCOL_ERROR
             throw new DecoderException( ide.getMessage() );
         }
     }
 }