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.api.ldap.model.schema.syntaxCheckers; 021 022 023import java.text.ParseException; 024 025import org.apache.directory.api.ldap.model.constants.SchemaConstants; 026import org.apache.directory.api.ldap.model.schema.SyntaxChecker; 027import org.apache.directory.api.ldap.model.schema.parsers.LdapSyntaxDescriptionSchemaParser; 028import org.apache.directory.api.util.Strings; 029import org.slf4j.Logger; 030import 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 */ 046@SuppressWarnings("serial") 047public class LdapSyntaxDescriptionSyntaxChecker extends SyntaxChecker 048{ 049 /** A logger for this class */ 050 private static final Logger LOG = LoggerFactory.getLogger( LdapSyntaxDescriptionSyntaxChecker.class ); 051 052 /** The schema parser used to parse the LdapSyntax description Syntax */ 053 private LdapSyntaxDescriptionSchemaParser schemaParser = new LdapSyntaxDescriptionSchemaParser(); 054 055 056 /** 057 * 058 * Creates a new instance of LdapSyntaxDescriptionSyntaxChecker. 059 * 060 */ 061 public LdapSyntaxDescriptionSyntaxChecker() 062 { 063 super( SchemaConstants.LDAP_SYNTAX_DESCRIPTION_SYNTAX ); 064 } 065 066 067 /** 068 * {@inheritDoc} 069 */ 070 public boolean isValidSyntax( Object value ) 071 { 072 String strValue = null; 073 074 if ( value == null ) 075 { 076 LOG.debug( "Syntax invalid for 'null'" ); 077 return false; 078 } 079 080 if ( value instanceof String ) 081 { 082 strValue = ( String ) value; 083 } 084 else if ( value instanceof byte[] ) 085 { 086 strValue = Strings.utf8ToString( ( byte[] ) value ); 087 } 088 else 089 { 090 strValue = value.toString(); 091 } 092 093 try 094 { 095 schemaParser.parseLdapSyntaxDescription( strValue ); 096 LOG.debug( "Syntax valid for '{}'", value ); 097 098 return true; 099 } 100 catch ( ParseException pe ) 101 { 102 LOG.debug( "Syntax invalid for '{}'", value ); 103 return false; 104 } 105 } 106}