1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.directory.api.ldap.codec.actions.ldapMessage;
21
22
23 import org.apache.directory.api.asn1.DecoderException;
24 import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
25 import org.apache.directory.api.asn1.ber.tlv.TLV;
26 import org.apache.directory.api.i18n.I18n;
27 import org.apache.directory.api.ldap.codec.api.LdapMessageContainer;
28 import org.apache.directory.api.ldap.model.message.Message;
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
31
32
33 /**
34 * The action used to initialize an LdapMessage
35 * <pre>
36 * LDAPMessage --> SEQUENCE { ...
37 *
38 * We have a LDAPMessage, and the tag must be 0x30.
39 *
40 * The next state will be LDAP_MESSAGE_STATE
41 * </pre>
42 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
43 */
44 public class InitLdapMessage extends GrammarAction<LdapMessageContainer<Message>>
45 {
46 /** The logger */
47 private static final Logger LOG = LoggerFactory.getLogger( InitLdapMessage.class );
48
49
50 /**
51 * Instantiates a new action.
52 */
53 public InitLdapMessage()
54 {
55 super( "LdapMessage initialization" );
56 }
57
58
59 /**
60 * {@inheritDoc}
61 */
62 @Override
63 public void action( LdapMessageContainer<Message> container ) throws DecoderException
64 {
65 TLV tlv = container.getCurrentTLV();
66
67 // The Length should not be null
68 if ( tlv.getLength() == 0 )
69 {
70 LOG.error( I18n.err( I18n.ERR_05142_ZERO_LENGTH_MESSAGE ) );
71
72 // This will generate a PROTOCOL_ERROR
73 throw new DecoderException( I18n.err( I18n.ERR_05143_EMPTY_MESSAGE ) );
74 }
75 }
76 }