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.schema.SyntaxChecker;
024import org.slf4j.Logger;
025import 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 */
033@SuppressWarnings("serial")
034public class CsnSidSyntaxChecker extends SyntaxChecker
035{
036    /** A logger for this class */
037    private static final Logger LOG = LoggerFactory.getLogger( CsnSidSyntaxChecker.class );
038
039    /**
040     * Creates a new instance of CsnSyntaxChecker.
041     */
042    public CsnSidSyntaxChecker()
043    {
044        super( SchemaConstants.CSN_SID_SYNTAX );
045    }
046
047
048    /**
049     * {@inheritDoc}
050     */
051    public boolean isValidSyntax( Object value )
052    {
053        if ( value == null )
054        {
055            LOG.debug( "Syntax invalid for 'null'" );
056            return false;
057        }
058        
059        if ( ! ( value instanceof String ) )
060        {
061            LOG.debug( "Syntax invalid for '{}'", value );
062            return false;
063        }
064        
065        String sidStr = (String)value;
066        
067        if ( sidStr.length() > 3 )
068        {
069            LOG.debug( "Syntax invalid for '{}'", value );
070            return false;
071        }
072
073        // The SID must be an hexadecimal number between 0x00 and 0xFFF
074        
075        try
076        {
077            int sid = Integer.parseInt( sidStr, 16 );
078            
079            if ( ( sid < 0 ) || ( sid > 0x0fff ) )
080            {
081                LOG.debug( "Syntax invalid for '{}'", value );
082                return false;
083            }
084        }
085        catch ( NumberFormatException nfe )
086        {
087            LOG.debug( "Syntax invalid for '{}'", value );
088            return false;
089        }
090        
091        LOG.debug( "Syntax valid for '{}'", value );
092        return true;
093    }
094}