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 */ 020package org.apache.directory.shared.ldap.model.schema.syntaxCheckers; 021 022 023import org.apache.directory.shared.ldap.model.constants.SchemaConstants; 024import org.apache.directory.shared.ldap.model.schema.SyntaxChecker; 025import org.apache.directory.shared.util.Strings; 026import org.slf4j.Logger; 027import org.slf4j.LoggerFactory; 028 029 030/** 031 * A SyntaxChecker which verifies that a value is a Numeric String according to RFC 4517. 032 * 033 * From RFC 4517 : 034 * 035 * NumericString = 1*(DIGIT / SPACE) 036 * 037 * From RFC 4512 : 038 * DIGIT = %x30 | LDIGIT ; "0"-"9" 039 * LDIGIT = %x31-39 ; "1"-"9" 040 * SPACE = %x20 ; space (" ") 041 * 042 * 043 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 044 */ 045@SuppressWarnings("serial") 046public class NumericStringSyntaxChecker extends SyntaxChecker 047{ 048 /** A logger for this class */ 049 private static final Logger LOG = LoggerFactory.getLogger( NumericStringSyntaxChecker.class ); 050 051 /** 052 * Creates a new instance of NumericStringSyntaxChecker. 053 */ 054 public NumericStringSyntaxChecker() 055 { 056 super( SchemaConstants.NUMERIC_STRING_SYNTAX ); 057 } 058 059 060 /** 061 * {@inheritDoc} 062 */ 063 public boolean isValidSyntax( Object value ) 064 { 065 String strValue = null; 066 067 if ( value == null ) 068 { 069 LOG.debug( "Syntax invalid for 'null'" ); 070 return false; 071 } 072 073 if ( value instanceof String ) 074 { 075 strValue = ( String ) value; 076 } 077 else if ( value instanceof byte[] ) 078 { 079 strValue = Strings.utf8ToString((byte[]) value); 080 } 081 else 082 { 083 strValue = value.toString(); 084 } 085 086 // We should have at least one char 087 if ( strValue.length() == 0 ) 088 { 089 LOG.debug( "Syntax invalid for '{}'", value ); 090 return false; 091 } 092 093 // Check that each char is either a digit or a space 094 for ( int i = 0; i < strValue.length(); i++ ) 095 { 096 switch ( strValue.charAt( i ) ) 097 { 098 case '0': 099 case '1' : 100 case '2' : 101 case '3' : 102 case '4' : 103 case '5' : 104 case '6' : 105 case '7' : 106 case '8' : 107 case '9' : 108 case ' ' : 109 continue; 110 111 default : 112 LOG.debug( "Syntax invalid for '{}'", value ); 113 return false; 114 } 115 } 116 117 LOG.debug( "Syntax valid for '{}'", value ); 118 return true; 119 } 120}