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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *  
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *  
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License. 
18   *  
19   */
20  package org.apache.directory.api.ldap.model.schema.syntaxCheckers;
21  
22  
23  import java.util.UUID;
24  
25  import org.apache.directory.api.ldap.model.constants.SchemaConstants;
26  import org.apache.directory.api.ldap.model.schema.SyntaxChecker;
27  import org.apache.directory.api.util.Strings;
28  import org.slf4j.Logger;
29  import org.slf4j.LoggerFactory;
30  
31  
32  /**
33   * An UUID syntax checker.
34   * 
35   * UUID ::= OCTET STRING (SIZE(16)) -- constrained to an UUID [RFC4122]
36   * 
37   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
38   */
39  @SuppressWarnings("serial")
40  public class UuidSyntaxChecker extends SyntaxChecker
41  {
42      /** A logger for this class */
43      private static final Logger LOG = LoggerFactory.getLogger( UuidSyntaxChecker.class );
44  
45  
46      /**
47       * Creates a new instance of UUIDSyntaxChecker.
48       */
49      public UuidSyntaxChecker()
50      {
51          super( SchemaConstants.UUID_SYNTAX );
52      }
53  
54  
55      /**
56       * {@inheritDoc}
57       */
58      public boolean isValidSyntax( Object value )
59      {
60          if ( value == null )
61          {
62              LOG.debug( "Syntax invalid for 'null'" );
63              return false;
64          }
65  
66          if ( value instanceof UUID )
67          {
68              return true;
69          }
70  
71          if ( !( value instanceof String ) )
72          {
73              LOG.debug( "Syntax invalid for '{}'", value );
74              return false;
75          }
76  
77          return Strings.isValidUuid( ( String ) value );
78      }
79  }