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, eCopyOfUuidSyntaxCheckerither 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    import org.apache.directory.shared.ldap.constants.SchemaConstants;
023    import org.apache.directory.shared.ldap.schema.SyntaxChecker;
024    import org.slf4j.Logger;
025    import org.slf4j.LoggerFactory;
026    
027    
028    /**
029     * An CSN SID syntax checker.
030     * 
031     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
032     * @version $Rev: 736240 $
033     */
034    public class CsnSidSyntaxChecker extends SyntaxChecker
035    {
036        /** A logger for this class */
037        private static final Logger LOG = LoggerFactory.getLogger( CsnSidSyntaxChecker.class );
038    
039        /** The serialVersionUID */
040        private static final long serialVersionUID = 1L;
041    
042        /**
043         * Creates a new instance of CsnSyntaxChecker.
044         */
045        public CsnSidSyntaxChecker()
046        {
047            super( SchemaConstants.CSN_SID_SYNTAX );
048        }
049    
050    
051        /**
052         * {@inheritDoc}
053         */
054        public boolean isValidSyntax( Object value )
055        {
056            if ( value == null )
057            {
058                LOG.debug( "Syntax invalid for '{}'", value );
059                return false;
060            }
061            
062            if ( ! ( value instanceof String ) )
063            {
064                LOG.debug( "Syntax invalid for '{}'", value );
065                return false;
066            }
067            
068            String sidStr = (String)value;
069            
070            if ( sidStr.length() > 3 )
071            {
072                LOG.debug( "Syntax invalid for '{}'", value );
073                return false;
074            }
075    
076            // The SID must be an hexadecimal number between 0x00 and 0xFFF
077            
078            try
079            {
080                int sid = Integer.parseInt( sidStr, 16 );
081                
082                if ( ( sid < 0 ) || ( sid > 0x0fff ) )
083                {
084                    LOG.debug( "Syntax invalid for '{}'", value );
085                    return false;
086                }
087            }
088            catch ( NumberFormatException nfe )
089            {
090                LOG.debug( "Syntax invalid for '{}'", value );
091                return false;
092            }
093            
094            LOG.debug( "Syntax valid for '{}'", value );
095            return true;
096        }
097    }