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 java.text.ParseException;
024
025 import org.apache.directory.shared.ldap.constants.SchemaConstants;
026 import org.apache.directory.shared.ldap.schema.AbstractSyntaxChecker;
027 import org.apache.directory.shared.ldap.schema.parsers.LdapSyntaxDescriptionSchemaParser;
028 import org.apache.directory.shared.ldap.util.StringTools;
029
030
031 /**
032 * A SyntaxChecker which verifies that a value follows the
033 * LDAP syntax descripton syntax according to RFC 4512, par 4.2.2:
034 *
035 * <pre>
036 * SyntaxDescription = LPAREN WSP
037 * numericoid ; object identifier
038 * [ SP "DESC" SP qdstring ] ; description
039 * extensions WSP RPAREN ; extensions
040 * </pre>
041 *
042 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
043 * @version $Rev$
044 */
045 public class LdapSyntaxDescriptionSyntaxChecker extends AbstractSyntaxChecker
046 {
047 /** The schema parser used to parse the LdapSyntaxDescription Syntax */
048 private LdapSyntaxDescriptionSchemaParser schemaParser = new LdapSyntaxDescriptionSchemaParser();
049
050
051 /**
052 *
053 * Creates a new instance of AttributeTypeDescriptionSchemaParser.
054 *
055 */
056 public LdapSyntaxDescriptionSyntaxChecker()
057 {
058 super( SchemaConstants.LDAP_SYNTAX_DESCRIPTION_SYNTAX );
059 }
060
061 /**
062 *
063 * Creates a new instance of LdapSyntaxDescriptionSyntaxChecker.
064 *
065 * @param oid the oid to associate with this new SyntaxChecker
066 *
067 */
068 protected LdapSyntaxDescriptionSyntaxChecker( String oid )
069 {
070 super( oid );
071 }
072
073 /* (non-Javadoc)
074 * @see org.apache.directory.shared.ldap.schema.SyntaxChecker#isValidSyntax(java.lang.Object)
075 */
076 public boolean isValidSyntax( Object value )
077 {
078 String strValue =null;
079
080 if ( value == null )
081 {
082 return false;
083 }
084
085 if ( value instanceof String )
086 {
087 strValue = ( String ) value;
088 }
089 else if ( value instanceof byte[] )
090 {
091 strValue = StringTools.utf8ToString( ( byte[] ) value );
092 }
093 else
094 {
095 strValue = value.toString();
096 }
097
098 try
099 {
100 schemaParser.parseLdapSyntaxDescription( strValue );
101 return true;
102 }
103 catch ( ParseException pe )
104 {
105 return false;
106 }
107 }
108 }