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     */
020    package org.apache.directory.shared.ldap.schema.syntaxes;
021    
022    
023    import org.apache.directory.shared.ldap.constants.SchemaConstants;
024    import org.apache.directory.shared.ldap.schema.AbstractSyntaxChecker;
025    import org.apache.directory.shared.ldap.util.StringTools;
026    
027    
028    /**
029     * A SyntaxChecker which verifies that a value is a IA5 String according to RFC 4517.
030     * 
031     * From RFC 4517 :
032     * IA5String          = *(%x00-7F)
033     * 
034     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
035     * @version $Rev: 437007 $
036     */
037    public class Ia5StringSyntaxChecker extends AbstractSyntaxChecker
038    {
039        /**
040         * 
041         * Creates a new instance of Ia5StringSyntaxChecker.
042         *
043         */
044        public Ia5StringSyntaxChecker()
045        {
046            super( SchemaConstants.IA5_STRING_SYNTAX );
047        }
048        
049        /**
050         * 
051         * Creates a new instance of Ia5StringSyntaxChecker.
052         * 
053         * @param oid the oid to associate with this new SyntaxChecker
054         *
055         */
056        protected Ia5StringSyntaxChecker( String oid )
057        {
058            super( oid );
059        }
060        
061        /* (non-Javadoc)
062         * @see org.apache.directory.shared.ldap.schema.SyntaxChecker#isValidSyntax(java.lang.Object)
063         */
064        public boolean isValidSyntax( Object value )
065        {
066            String strValue = null;
067    
068            if ( value == null )
069            {
070                return true;
071            }
072            
073            if ( value instanceof String )
074            {
075                strValue = ( String ) value;
076            }
077            else if ( value instanceof byte[] )
078            {
079                strValue = StringTools.utf8ToString( ( byte[] ) value ); 
080            }
081            else
082            {
083                strValue = value.toString();
084            }
085    
086            return StringTools.isIA5String( strValue );
087        }
088    }