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.shared.ldap.model.schema.syntaxCheckers; 021 022 023import java.text.ParseException; 024 025import org.apache.directory.shared.ldap.model.constants.SchemaConstants; 026import org.apache.directory.shared.ldap.model.schema.SyntaxChecker; 027import org.apache.directory.shared.ldap.model.schema.parsers.LdapSyntaxDescriptionSchemaParser; 028import org.apache.directory.shared.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 * {@inheritDoc} 068 */ 069 public boolean isValidSyntax( Object value ) 070 { 071 String strValue =null; 072 073 if ( value == null ) 074 { 075 LOG.debug( "Syntax invalid for 'null'" ); 076 return false; 077 } 078 079 if ( value instanceof String ) 080 { 081 strValue = ( String ) value; 082 } 083 else if ( value instanceof byte[] ) 084 { 085 strValue = Strings.utf8ToString((byte[]) value); 086 } 087 else 088 { 089 strValue = value.toString(); 090 } 091 092 try 093 { 094 schemaParser.parseLdapSyntaxDescription( strValue ); 095 LOG.debug( "Syntax valid for '{}'", value ); 096 097 return true; 098 } 099 catch ( ParseException pe ) 100 { 101 LOG.debug( "Syntax invalid for '{}'", value ); 102 return false; 103 } 104 } 105}