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 */
020 package org.apache.directory.shared.ldap.schema.syntaxes;
021
022 import org.apache.directory.shared.ldap.constants.SchemaConstants;
023 import org.apache.directory.shared.ldap.csn.Csn;
024 import org.apache.directory.shared.ldap.csn.InvalidCSNException;
025 import org.apache.directory.shared.ldap.schema.AbstractSyntaxChecker;
026 import org.apache.directory.shared.ldap.schema.SyntaxChecker;
027
028
029 /**
030 * An CSN syntax checker.
031 *
032 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
033 * @version $Rev: 736240 $
034 */
035 public class CsnSyntaxChecker extends AbstractSyntaxChecker
036 {
037 /** the Apache assigned internal OID for this syntax checker */
038 public static final SyntaxChecker INSTANCE = new CsnSyntaxChecker();
039
040
041 /**
042 * Creates a new instance of CsnSyntaxChecker.
043 */
044 public CsnSyntaxChecker()
045 {
046 super( SchemaConstants.CSN_SYNTAX );
047 }
048
049
050 /**
051 *
052 * Creates a new instance of CsnSyntaxChecker.
053 *
054 * @param oid the oid to associate with this new SyntaxChecker
055 *
056 */
057 protected CsnSyntaxChecker( String oid )
058 {
059 super( oid );
060 }
061
062
063 /**
064 * @see org.apache.directory.shared.ldap.schema.SyntaxChecker#isValidSyntax(Object)
065 *
066 * The value is stored as a String internally.
067 *
068 * @param value the value of some attribute with the syntax
069 * @return true if the value is in the valid syntax, false otherwise
070 */
071 public boolean isValidSyntax( Object value )
072 {
073 if ( value == null )
074 {
075 return false;
076 }
077
078 if ( ! ( value instanceof String ) )
079 {
080 return false;
081 }
082
083 String csnStr = (String)value;
084
085 // It must be a valid CSN : try to create a new one.
086 try
087 {
088 return Csn.isValid( csnStr );
089 }
090 catch ( InvalidCSNException icsne )
091 {
092 return false;
093 }
094 }
095 }