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.syntaxCheckers; 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.SyntaxChecker; 027 import org.apache.directory.shared.ldap.schema.parsers.LdapSyntaxDescriptionSchemaParser; 028 import org.apache.directory.shared.ldap.util.StringTools; 029 import org.slf4j.Logger; 030 import org.slf4j.LoggerFactory; 031 032 033 /** 034 * A SyntaxChecker which verifies that a value follows the 035 * LDAP syntax descripton syntax according to RFC 4512, par 4.2.2: 036 * 037 * <pre> 038 * SyntaxDescription = LPAREN WSP 039 * numericoid ; object identifier 040 * [ SP "DESC" SP qdstring ] ; description 041 * extensions WSP RPAREN ; extensions 042 * </pre> 043 * 044 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 045 * @version $Rev$ 046 */ 047 public class LdapSyntaxDescriptionSyntaxChecker extends SyntaxChecker 048 { 049 /** A logger for this class */ 050 private static final Logger LOG = LoggerFactory.getLogger( LdapSyntaxDescriptionSyntaxChecker.class ); 051 052 /** The serialVersionUID */ 053 private static final long serialVersionUID = 1L; 054 055 /** The schema parser used to parse the LdapSyntax description Syntax */ 056 private LdapSyntaxDescriptionSchemaParser schemaParser = new LdapSyntaxDescriptionSchemaParser(); 057 058 059 /** 060 * 061 * Creates a new instance of LdapSyntaxDescriptionSyntaxChecker. 062 * 063 */ 064 public LdapSyntaxDescriptionSyntaxChecker() 065 { 066 super( SchemaConstants.LDAP_SYNTAX_DESCRIPTION_SYNTAX ); 067 } 068 069 /** 070 * {@inheritDoc} 071 */ 072 public boolean isValidSyntax( Object value ) 073 { 074 String strValue =null; 075 076 if ( value == null ) 077 { 078 LOG.debug( "Syntax invalid for '{}'", value ); 079 return false; 080 } 081 082 if ( value instanceof String ) 083 { 084 strValue = ( String ) value; 085 } 086 else if ( value instanceof byte[] ) 087 { 088 strValue = StringTools.utf8ToString( ( byte[] ) value ); 089 } 090 else 091 { 092 strValue = value.toString(); 093 } 094 095 try 096 { 097 schemaParser.parseLdapSyntaxDescription( strValue ); 098 LOG.debug( "Syntax valid for '{}'", value ); 099 100 return true; 101 } 102 catch ( ParseException pe ) 103 { 104 LOG.debug( "Syntax invalid for '{}'", value ); 105 return false; 106 } 107 } 108 }