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.syntaxes;
021
022
023 import org.apache.directory.shared.ldap.schema.AbstractSyntaxChecker;
024 import org.apache.directory.shared.ldap.util.StringTools;
025
026
027 /**
028 * A SyntaxChecker which verifies that a value is a Number according to RFC 4512.
029 *
030 * From RFC 4512 :
031 * number = DIGIT | ( LDIGIT 1*DIGIT )
032 * DIGIT = %x30 | LDIGIT ; "0"-"9"
033 * LDIGIT = %x31-39 ; "1"-"9"
034 *
035 *
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 * @version $Rev$
038 */
039 public class NumberSyntaxChecker extends AbstractSyntaxChecker
040 {
041 /** The Syntax OID, according to RFC 4517, par. 3.3.23 */
042 private static final String SC_OID = "1.3.6.1.4.1.18060.0.4.0.0.4";
043
044 /**
045 *
046 * Creates a new instance of NumberSyntaxChecker.
047 *
048 */
049 public NumberSyntaxChecker()
050 {
051 super( SC_OID );
052 }
053
054
055 /**
056 *
057 * Creates a new instance of NumberSyntaxChecker.
058 *
059 * @param oid the oid to associate with this new SyntaxChecker
060 *
061 */
062 protected NumberSyntaxChecker( String oid )
063 {
064 super( oid );
065 }
066
067 /* (non-Javadoc)
068 * @see org.apache.directory.shared.ldap.schema.SyntaxChecker#isValidSyntax(java.lang.Object)
069 */
070 public boolean isValidSyntax( Object value )
071 {
072 String strValue = null;
073
074 if ( value == null )
075 {
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 = StringTools.utf8ToString( ( byte[] ) value );
086 }
087 else
088 {
089 strValue = value.toString();
090 }
091
092 // We should have at least one char
093 if ( strValue.length() == 0 )
094 {
095 return false;
096 }
097
098 // Check that each char is either a digit or a space
099 for ( int i = 0; i < strValue.length(); i++ )
100 {
101 switch ( strValue.charAt( i ) )
102 {
103 case '0':
104 case '1' :
105 case '2' :
106 case '3' :
107 case '4' :
108 case '5' :
109 case '6' :
110 case '7' :
111 case '8' :
112 case '9' :
113 continue;
114
115 default :
116 return false;
117 }
118 }
119
120 if ( ( strValue.charAt( 0 ) == '0' ) && strValue.length() > 1 )
121 {
122 // A number can't start with a '0' unless it's the only
123 // number
124 return false;
125 }
126
127 return true;
128 }
129 }