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.schema.SyntaxChecker;
025import org.slf4j.Logger;
026import org.slf4j.LoggerFactory;
027
028
029/**
030 * An CSN SID syntax checker.
031 * 
032 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
033 */
034@SuppressWarnings("serial")
035public class CsnSidSyntaxChecker extends SyntaxChecker
036{
037    /** A logger for this class */
038    private static final Logger LOG = LoggerFactory.getLogger( CsnSidSyntaxChecker.class );
039
040
041    /**
042     * Creates a new instance of CsnSyntaxChecker.
043     */
044    public CsnSidSyntaxChecker()
045    {
046        super( SchemaConstants.CSN_SID_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 sidStr = ( String ) value;
068
069        if ( sidStr.length() > 3 )
070        {
071            LOG.debug( "Syntax invalid for '{}'", value );
072            return false;
073        }
074
075        // The SID must be an hexadecimal number between 0x00 and 0xFFF
076
077        try
078        {
079            int sid = Integer.parseInt( sidStr, 16 );
080
081            if ( ( sid < 0 ) || ( sid > 0x0fff ) )
082            {
083                LOG.debug( "Syntax invalid for '{}'", value );
084                return false;
085            }
086        }
087        catch ( NumberFormatException nfe )
088        {
089            LOG.debug( "Syntax invalid for '{}'", value );
090            return false;
091        }
092
093        LOG.debug( "Syntax valid for '{}'", value );
094        return true;
095    }
096}