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.asn1.ber.tlv.Value;
027 import org.apache.directory.shared.asn1.codec.DecoderException;
028 import org.apache.directory.shared.ldap.codec.LdapMessageCodec;
029 import org.apache.directory.shared.ldap.codec.LdapMessageContainer;
030 import org.apache.directory.shared.ldap.codec.controls.CodecControl;
031 import org.apache.directory.shared.ldap.codec.controls.ControlDecoder;
032 import org.apache.directory.shared.ldap.message.control.Control;
033 import org.apache.directory.shared.ldap.util.StringTools;
034 import org.slf4j.Logger;
035 import org.slf4j.LoggerFactory;
036
037
038 /**
039 * The action used to set the value of a control. This is an extension point
040 * where different controls can be plugged in (at least eventually). For now we
041 * hard code controls.
042 *
043 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
044 * @version $Rev$, $Date$,
045 */
046 public class ControlValueAction extends GrammarAction
047 {
048 /** The logger */
049 private static final Logger log = LoggerFactory.getLogger( ControlValueAction.class );
050
051 /** Speedup for logs */
052 private static final boolean IS_DEBUG = log.isDebugEnabled();
053
054
055 public void action( IAsn1Container container ) throws DecoderException
056 {
057 LdapMessageContainer ldapMessageContainer = ( LdapMessageContainer ) container;
058 TLV tlv = ldapMessageContainer.getCurrentTLV();
059 LdapMessageCodec message = ldapMessageContainer.getLdapMessage();
060
061 // Get the current control
062 Control control = message.getCurrentControl();
063 Value value = tlv.getValue();
064
065 ControlDecoder decoder = ((CodecControl)control).getDecoder();
066
067 // Store the value - have to handle the special case of a 0 length value
068 if ( tlv.getLength() == 0 )
069 {
070 control.setValue( StringTools.EMPTY_BYTES );
071 }
072 else
073 {
074 if ( decoder == null )
075 {
076 // No decoder : store the raw value
077 control.setValue( value.getData() );
078 }
079 else
080 {
081 decoder.decode( value.getData(), control );
082 }
083 }
084
085 // We can have an END transition
086 ldapMessageContainer.grammarEndAllowed( true );
087
088 if ( IS_DEBUG )
089 {
090 log.debug( "Control value : " + StringTools.dumpBytes( ( byte[] ) control.getValue() ) );
091 }
092 }
093 }