| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.shared.ldap.schema.syntaxCheckers; |
| |
| import org.apache.directory.shared.ldap.constants.SchemaConstants; |
| import org.apache.directory.shared.ldap.schema.SyntaxChecker; |
| import org.apache.directory.shared.ldap.util.StringTools; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * An UUID syntax checker. |
| * |
| * UUID ::= OCTET STRING (SIZE(16)) -- constrained to an UUID [RFC4122] |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class UuidSyntaxChecker extends SyntaxChecker |
| { |
| /** A logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( UuidSyntaxChecker.class ); |
| |
| /** The serialVersionUID */ |
| private static final long serialVersionUID = 1L; |
| |
| // Tells if the byte is alphanumeric |
| private static boolean isHex( byte b ) |
| { |
| return StringTools.isHex( b ); |
| } |
| |
| |
| /** |
| * Creates a new instance of UUIDSyntaxChecker. |
| */ |
| public UuidSyntaxChecker() |
| { |
| super( SchemaConstants.UUID_SYNTAX ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public boolean isValidSyntax( Object value ) |
| { |
| if ( value == null ) |
| { |
| LOG.debug( "Syntax invalid for 'null'" ); |
| return false; |
| } |
| |
| if ( ! ( value instanceof String ) ) |
| { |
| LOG.debug( "Syntax invalid for '{}'", value ); |
| return false; |
| } |
| |
| byte[] b = ((String)value).getBytes(); |
| |
| if ( b.length < 36) |
| { |
| return false; |
| } |
| |
| if ( |
| isHex( b[0] ) && isHex( b[1] ) && isHex( b[2] ) && isHex( b[3] ) & |
| isHex( b[4] ) && isHex( b[5] ) && isHex( b[6] ) && isHex( b[7] ) & |
| b[8] == '-' & |
| isHex( b[9] ) && isHex( b[10] ) && isHex( b[11] ) && isHex( b[12] ) & |
| b[13] == '-' & |
| isHex( b[14] ) && isHex( b[15] ) && isHex( b[16] ) && isHex( b[17] ) & |
| b[18] == '-' & |
| isHex( b[19] ) && isHex( b[20] ) && isHex( b[21] ) && isHex( b[22] ) & |
| b[23] == '-' & |
| isHex( b[24] ) && isHex( b[25] ) && isHex( b[26] ) && isHex( b[27] ) & |
| isHex( b[28] ) && isHex( b[29] ) && isHex( b[30] ) && isHex( b[31] ) & |
| isHex( b[32] ) && isHex( b[33] ) && isHex( b[34] ) && isHex( b[35] ) ) |
| { |
| // There is not that much more we can check. |
| LOG.debug( "Syntax valid for '{}'", value ); |
| return true; |
| } |
| |
| LOG.debug( "Syntax invalid for '{}'", value ); |
| return false; |
| } |
| } |