001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    package org.apache.directory.shared.ldap.codec.actions;
021    
022    
023    import org.apache.directory.shared.asn1.ber.IAsn1Container;
024    import org.apache.directory.shared.asn1.ber.grammar.GrammarAction;
025    import org.apache.directory.shared.asn1.ber.tlv.TLV;
026    import org.apache.directory.shared.ldap.codec.LdapMessageContainer;
027    import org.apache.directory.shared.ldap.codec.modify.ModifyRequestCodec;
028    import org.apache.directory.shared.ldap.util.StringTools;
029    import org.slf4j.Logger;
030    import org.slf4j.LoggerFactory;
031    
032    
033    /**
034     * The action used to store a Value to an modifyRequest
035     * 
036     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037     * @version $Rev$, $Date$, 
038     */
039    public class ModifyAttributeValueAction extends GrammarAction
040    {
041        /** The logger */
042        private static final Logger log = LoggerFactory.getLogger( ModifyAttributeValueAction.class );
043    
044        /** Speedup for logs */
045        private static final boolean IS_DEBUG = log.isDebugEnabled();
046    
047        public ModifyAttributeValueAction()
048        {
049            super( "Stores AttributeValue" );
050        }
051    
052        /**
053         * The initialization action
054         */
055        public void action( IAsn1Container container )
056        {
057            LdapMessageContainer ldapMessageContainer = ( LdapMessageContainer ) container;
058            ModifyRequestCodec modifyRequest = ldapMessageContainer.getModifyRequest();
059    
060            TLV tlv = ldapMessageContainer.getCurrentTLV();
061    
062            // Store the value. It can't be null
063            byte[] value = StringTools.EMPTY_BYTES;
064    
065            if ( tlv.getLength() == 0 )
066            {
067                modifyRequest.addAttributeValue( "" );
068            }
069            else
070            {
071                value = tlv.getValue().getData();
072    
073                if ( ldapMessageContainer.isBinary( modifyRequest.getCurrentAttributeType() ) )
074                {
075                    modifyRequest.addAttributeValue( value );
076                }
077                else
078                {
079                    modifyRequest.addAttributeValue( StringTools.utf8ToString( ( byte[] ) value ) );
080                }
081            }
082    
083            // We can have an END transition
084            ldapMessageContainer.grammarEndAllowed( true );
085    
086            if ( IS_DEBUG )
087            {
088                log.debug( "Value modified : {}", value );
089            }
090        }
091    }