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 */
020package org.apache.directory.shared.ldap.model.schema.syntaxCheckers;
021
022import org.apache.directory.shared.ldap.model.constants.SchemaConstants;
023import org.apache.directory.shared.ldap.model.csn.Csn;
024import org.apache.directory.shared.ldap.model.csn.InvalidCSNException;
025import org.apache.directory.shared.ldap.model.schema.SyntaxChecker;
026import org.slf4j.Logger;
027import 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 */
035@SuppressWarnings("serial")
036public class CsnSyntaxChecker extends SyntaxChecker
037{
038    /** A logger for this class */
039    private static final Logger LOG = LoggerFactory.getLogger( CsnSyntaxChecker.class );
040
041    /**
042     * Creates a new instance of CsnSyntaxChecker.
043     */
044    public CsnSyntaxChecker()
045    {
046        super( SchemaConstants.CSN_SYNTAX );
047    }
048
049
050    /**
051     * {@inheritDoc}
052     */
053    public boolean isValidSyntax( Object value )
054    {
055        if ( value == null )
056        {
057            LOG.debug( "Syntax invalid for 'null'" );
058            return false;
059        }
060        
061        if ( ! ( value instanceof String ) )
062        {
063            LOG.debug( "Syntax invalid for '{}'", value );
064            return false;
065        }
066        
067        String csnStr = (String)value;
068        
069        // It must be a valid CSN : try to create a new one.
070        try
071        {
072            boolean result = Csn.isValid( csnStr );
073            
074            if ( result )
075            {
076                LOG.debug( "Syntax valid for '{}'", value );
077            }
078            else
079            {
080                LOG.debug( "Syntax invalid for '{}'", value );
081            }
082            
083            return result;
084        }
085        catch ( InvalidCSNException icsne )
086        {
087            LOG.debug( "Syntax invalid for '{}'", value );
088            return false;
089        }
090    }
091}