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.api.ldap.model.schema.syntaxCheckers;
021
022
023import org.apache.directory.api.ldap.model.constants.SchemaConstants;
024import org.apache.directory.api.ldap.model.csn.Csn;
025import org.apache.directory.api.ldap.model.csn.InvalidCSNException;
026import org.apache.directory.api.ldap.model.schema.SyntaxChecker;
027import org.slf4j.Logger;
028import org.slf4j.LoggerFactory;
029
030
031/**
032 * An CSN syntax checker.
033 * 
034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
035 */
036@SuppressWarnings("serial")
037public class CsnSyntaxChecker extends SyntaxChecker
038{
039    /** A logger for this class */
040    private static final Logger LOG = LoggerFactory.getLogger( CsnSyntaxChecker.class );
041
042
043    /**
044     * Creates a new instance of CsnSyntaxChecker.
045     */
046    public CsnSyntaxChecker()
047    {
048        super( SchemaConstants.CSN_SYNTAX );
049    }
050
051
052    /**
053     * {@inheritDoc}
054     */
055    public boolean isValidSyntax( Object value )
056    {
057        if ( value == null )
058        {
059            LOG.debug( "Syntax invalid for 'null'" );
060            return false;
061        }
062
063        if ( !( value instanceof String ) )
064        {
065            LOG.debug( "Syntax invalid for '{}'", value );
066            return false;
067        }
068
069        String csnStr = ( String ) value;
070
071        // It must be a valid CSN : try to create a new one.
072        try
073        {
074            boolean result = Csn.isValid( csnStr );
075
076            if ( result )
077            {
078                LOG.debug( "Syntax valid for '{}'", value );
079            }
080            else
081            {
082                LOG.debug( "Syntax invalid for '{}'", value );
083            }
084
085            return result;
086        }
087        catch ( InvalidCSNException icsne )
088        {
089            LOG.debug( "Syntax invalid for '{}'", value );
090            return false;
091        }
092    }
093}