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.csn.Csn;
024    import org.apache.directory.shared.ldap.csn.InvalidCSNException;
025    import org.apache.directory.shared.ldap.schema.SyntaxChecker;
026    import org.slf4j.Logger;
027    import org.slf4j.LoggerFactory;
028    
029    
030    /**
031     * An CSN syntax checker.
032     * 
033     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
034     * @version $Rev: 736240 $
035     */
036    public class CsnSyntaxChecker extends SyntaxChecker
037    {
038        /** A logger for this class */
039        private static final Logger LOG = LoggerFactory.getLogger( CsnSyntaxChecker.class );
040    
041        /** The serialVersionUID */
042        private static final long serialVersionUID = 1L;
043    
044        /**
045         * Creates a new instance of CsnSyntaxChecker.
046         */
047        public CsnSyntaxChecker()
048        {
049            super( SchemaConstants.CSN_SYNTAX );
050        }
051    
052    
053        /**
054         * {@inheritDoc}
055         */
056        public boolean isValidSyntax( Object value )
057        {
058            if ( value == null )
059            {
060                LOG.debug( "Syntax invalid for '{}'", value );
061                return false;
062            }
063            
064            if ( ! ( value instanceof String ) )
065            {
066                LOG.debug( "Syntax invalid for '{}'", value );
067                return false;
068            }
069            
070            String csnStr = (String)value;
071            
072            // It must be a valid CSN : try to create a new one.
073            try
074            {
075                boolean result = Csn.isValid( csnStr );
076                
077                if ( result )
078                {
079                    LOG.debug( "Syntax valid for '{}'", value );
080                }
081                else
082                {
083                    LOG.debug( "Syntax invalid for '{}'", value );
084                }
085                
086                return result;
087            }
088            catch ( InvalidCSNException icsne )
089            {
090                LOG.debug( "Syntax invalid for '{}'", value );
091                return false;
092            }
093        }
094    }