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, either 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
022
023import org.apache.directory.shared.ldap.model.constants.SchemaConstants;
024import org.apache.directory.shared.ldap.model.schema.SyntaxChecker;
025import org.apache.directory.shared.util.Strings;
026import org.slf4j.Logger;
027import org.slf4j.LoggerFactory;
028
029
030/**
031 * An UUID syntax checker.
032 * 
033 * UUID ::= OCTET STRING (SIZE(16)) -- constrained to an UUID [RFC4122]
034 * 
035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
036 */
037@SuppressWarnings("serial")
038public class UuidSyntaxChecker extends SyntaxChecker
039{
040    /** A logger for this class */
041    private static final Logger LOG = LoggerFactory.getLogger( UuidSyntaxChecker.class );
042
043    /**
044     * Creates a new instance of UUIDSyntaxChecker.
045     */
046    public UuidSyntaxChecker()
047    {
048        super( SchemaConstants.UUID_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        return Strings.isValidUuid((String) value);
070    }
071}