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 import org.apache.directory.shared.ldap.constants.SchemaConstants; 023 import org.apache.directory.shared.ldap.schema.SyntaxChecker; 024 import org.apache.directory.shared.ldap.util.StringTools; 025 import org.slf4j.Logger; 026 import org.slf4j.LoggerFactory; 027 028 029 /** 030 * An UUID syntax checker. 031 * 032 * UUID ::= OCTET STRING (SIZE(16)) -- constrained to an UUID [RFC4122] 033 * 034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 035 * @version $Rev: 736240 $ 036 */ 037 public class UuidSyntaxChecker extends SyntaxChecker 038 { 039 /** A logger for this class */ 040 private static final Logger LOG = LoggerFactory.getLogger( UuidSyntaxChecker.class ); 041 042 /** The serialVersionUID */ 043 private static final long serialVersionUID = 1L; 044 045 // Tells if the byte is alphanumeric 046 private static boolean isHex( byte b ) 047 { 048 return ( b > 0 ) && StringTools.ALPHA_DIGIT[b]; 049 } 050 051 /** 052 * Creates a new instance of UUIDSyntaxChecker. 053 */ 054 public UuidSyntaxChecker() 055 { 056 super( SchemaConstants.UUID_SYNTAX ); 057 } 058 059 060 /** 061 * {@inheritDoc} 062 */ 063 public boolean isValidSyntax( Object value ) 064 { 065 if ( value == null ) 066 { 067 LOG.debug( "Syntax invalid for '{}'", value ); 068 return false; 069 } 070 071 if ( ! ( value instanceof String ) ) 072 { 073 LOG.debug( "Syntax invalid for '{}'", value ); 074 return false; 075 } 076 077 byte[] b = ((String)value).getBytes(); 078 079 if ( b.length < 36) 080 { 081 return false; 082 } 083 084 if ( 085 isHex( b[0] ) && isHex( b[1] ) && isHex( b[2] ) && isHex( b[3] ) & 086 isHex( b[4] ) && isHex( b[5] ) && isHex( b[6] ) && isHex( b[7] ) & 087 b[8] == '-' & 088 isHex( b[9] ) && isHex( b[10] ) && isHex( b[11] ) && isHex( b[12] ) & 089 b[13] == '-' & 090 isHex( b[14] ) && isHex( b[15] ) && isHex( b[16] ) && isHex( b[17] ) & 091 b[18] == '-' & 092 isHex( b[19] ) && isHex( b[20] ) && isHex( b[21] ) && isHex( b[22] ) & 093 b[23] == '-' & 094 isHex( b[24] ) && isHex( b[25] ) && isHex( b[26] ) && isHex( b[27] ) & 095 isHex( b[28] ) && isHex( b[29] ) && isHex( b[30] ) && isHex( b[31] ) & 096 isHex( b[32] ) && isHex( b[33] ) && isHex( b[34] ) && isHex( b[35] ) ) 097 { 098 // There is not that much more we can check. 099 LOG.debug( "Syntax valid for '{}'", value ); 100 return true; 101 } 102 103 LOG.debug( "Syntax invalid for '{}'", value ); 104 return false; 105 } 106 }