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 */
020package org.apache.directory.api.ldap.codec.actions.modifyRequest;
021
022
023import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
024import org.apache.directory.api.asn1.ber.tlv.TLV;
025import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
026import org.apache.directory.api.ldap.codec.decorators.ModifyRequestDecorator;
027import org.apache.directory.api.ldap.model.exception.LdapException;
028import org.apache.directory.api.util.StringConstants;
029import org.apache.directory.api.util.Strings;
030import org.slf4j.Logger;
031import org.slf4j.LoggerFactory;
032
033
034/**
035 * The action used to store a Value to an modifyRequest
036 * 
037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
038 */
039public class StoreModifyRequestAttributeValue extends GrammarAction<LdapMessageContainer<ModifyRequestDecorator>>
040{
041    /** The logger */
042    private static final Logger LOG = LoggerFactory.getLogger( StoreModifyRequestAttributeValue.class );
043
044    /** Speedup for logs */
045    private static final boolean IS_DEBUG = LOG.isDebugEnabled();
046
047
048    /**
049     * Instantiates a new modify attribute value action.
050     */
051    public StoreModifyRequestAttributeValue()
052    {
053        super( "Stores AttributeValue" );
054    }
055
056
057    /**
058     * {@inheritDoc}
059     */
060    public void action( LdapMessageContainer<ModifyRequestDecorator> container )
061    {
062        ModifyRequestDecorator modifyRequestDecorator = container.getMessage();
063
064        TLV tlv = container.getCurrentTLV();
065
066        // Store the value. It can't be null
067        byte[] value = StringConstants.EMPTY_BYTES;
068
069        try
070        {
071            if ( tlv.getLength() == 0 )
072            {
073                modifyRequestDecorator.addAttributeValue( "" );
074            }
075            else
076            {
077                value = tlv.getValue().getData();
078
079                if ( container.isBinary( modifyRequestDecorator.getCurrentAttributeType() ) )
080                {
081                    modifyRequestDecorator.addAttributeValue( value );
082                }
083                else
084                {
085                    modifyRequestDecorator.addAttributeValue( Strings.utf8ToString( ( byte[] ) value ) );
086                }
087            }
088        }
089        catch ( LdapException le )
090        {
091            // Just swallow the exception, it can't occur here
092        }
093
094        // We can have an END transition
095        container.setGrammarEndAllowed( true );
096
097        if ( IS_DEBUG )
098        {
099            LOG.debug( "Value modified : {}", value );
100        }
101    }
102}