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 org.apache.directory.api.ldap.model.constants.SchemaConstants;
24 import org.apache.directory.api.ldap.model.schema.SyntaxChecker;
25 import org.apache.directory.api.util.Strings;
26 import org.slf4j.Logger;
27 import org.slf4j.LoggerFactory;
28
29
30 /**
31 * A SyntaxChecker which verifies that a value is a Numeric String according to RFC 4517.
32 *
33 * From RFC 4517 :
34 *
35 * NumericString = 1*(DIGIT / SPACE)
36 *
37 * From RFC 4512 :
38 * DIGIT = %x30 | LDIGIT ; "0"-"9"
39 * LDIGIT = %x31-39 ; "1"-"9"
40 * SPACE = %x20 ; space (" ")
41 *
42 *
43 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
44 */
45 @SuppressWarnings("serial")
46 public class NumericStringSyntaxChecker extends SyntaxChecker
47 {
48 /** A logger for this class */
49 private static final Logger LOG = LoggerFactory.getLogger( NumericStringSyntaxChecker.class );
50
51
52 /**
53 * Creates a new instance of NumericStringSyntaxChecker.
54 */
55 public NumericStringSyntaxChecker()
56 {
57 super( SchemaConstants.NUMERIC_STRING_SYNTAX );
58 }
59
60
61 /**
62 * {@inheritDoc}
63 */
64 public boolean isValidSyntax( Object value )
65 {
66 String strValue = null;
67
68 if ( value == null )
69 {
70 LOG.debug( "Syntax invalid for 'null'" );
71 return false;
72 }
73
74 if ( value instanceof String )
75 {
76 strValue = ( String ) value;
77 }
78 else if ( value instanceof byte[] )
79 {
80 strValue = Strings.utf8ToString( ( byte[] ) value );
81 }
82 else
83 {
84 strValue = value.toString();
85 }
86
87 // We should have at least one char
88 if ( strValue.length() == 0 )
89 {
90 LOG.debug( "Syntax invalid for '{}'", value );
91 return false;
92 }
93
94 // Check that each char is either a digit or a space
95 for ( int i = 0; i < strValue.length(); i++ )
96 {
97 switch ( strValue.charAt( i ) )
98 {
99 case '0':
100 case '1':
101 case '2':
102 case '3':
103 case '4':
104 case '5':
105 case '6':
106 case '7':
107 case '8':
108 case '9':
109 case ' ':
110 continue;
111
112 default:
113 LOG.debug( "Syntax invalid for '{}'", value );
114 return false;
115 }
116 }
117
118 LOG.debug( "Syntax valid for '{}'", value );
119 return true;
120 }
121 }