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.schema.syntaxCheckers;
021
022
023 import org.apache.directory.shared.ldap.constants.SchemaConstants;
024 import org.apache.directory.shared.ldap.name.DN;
025 import org.apache.directory.shared.ldap.schema.SyntaxChecker;
026 import org.apache.directory.shared.ldap.util.StringTools;
027 import org.slf4j.Logger;
028 import org.slf4j.LoggerFactory;
029
030
031 /**
032 * A SyntaxChecker which verifies that a value is a valid DN. We just check
033 * that the DN is valid, we don't need to verify each of the RDN syntax.
034 *
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 * @version $Rev$
037 */
038 public class DNSyntaxChecker extends SyntaxChecker
039 {
040 /** A logger for this class */
041 private static final Logger LOG = LoggerFactory.getLogger( DNSyntaxChecker.class );
042
043 /** The serialVersionUID */
044 private static final long serialVersionUID = 1L;
045
046 /**
047 * Creates a new instance of DNSyntaxChecker.
048 */
049 public DNSyntaxChecker()
050 {
051 super( SchemaConstants.DN_SYNTAX );
052 }
053
054
055 /**
056 * {@inheritDoc}
057 */
058 public boolean isValidSyntax( Object value )
059 {
060 String strValue = null;
061
062 if ( value == null )
063 {
064 LOG.debug( "Syntax invalid for '{}'", value );
065 return false;
066 }
067
068 if ( value instanceof String )
069 {
070 strValue = ( String ) value;
071 }
072 else if ( value instanceof byte[] )
073 {
074 strValue = StringTools.utf8ToString( ( byte[] ) value );
075 }
076 else
077 {
078 strValue = value.toString();
079 }
080
081 if ( strValue.length() == 0 )
082 {
083 // TODO: this should be a false, but for
084 // some reason, the principal is empty in
085 // some cases.
086 LOG.debug( "Syntax valid for '{}'", value );
087 return true;
088 }
089
090 // Check that the value is a valid DN
091 boolean result = DN.isValid( strValue );
092
093 if ( result )
094 {
095 LOG.debug( "Syntax valid for '{}'", value );
096 }
097 else
098 {
099 LOG.debug( "Syntax invalid for '{}'", value );
100 }
101
102 return result;
103 }
104 }