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.api.ldap.model.schema.syntaxCheckers; 021 022 023import org.apache.directory.api.i18n.I18n; 024import org.apache.directory.api.ldap.model.constants.SchemaConstants; 025import org.apache.directory.api.ldap.model.schema.SyntaxChecker; 026import org.apache.directory.api.util.Strings; 027 028 029/** 030 * A SyntaxChecker which verifies that a value is a Number according to RFC 4512. 031 * <p> 032 * From RFC 4512 : 033 * <pre> 034 * number = DIGIT | ( LDIGIT 1*DIGIT ) 035 * DIGIT = %x30 | LDIGIT ; "0"-"9" 036 * LDIGIT = %x31-39 ; "1"-"9" 037 * </pre> 038 * 039 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 040 */ 041@SuppressWarnings("serial") 042public final class NumberSyntaxChecker extends SyntaxChecker 043{ 044 /** 045 * A static instance of NumberSyntaxChecker 046 */ 047 public static final NumberSyntaxChecker INSTANCE = new NumberSyntaxChecker( SchemaConstants.NUMBER_SYNTAX ); 048 049 /** 050 * A static Builder for this class 051 */ 052 public static final class Builder extends SCBuilder<NumberSyntaxChecker> 053 { 054 /** 055 * The Builder constructor 056 */ 057 private Builder() 058 { 059 super( SchemaConstants.NUMBER_SYNTAX ); 060 } 061 062 063 /** 064 * Create a new instance of NumberSyntaxChecker 065 * @return A new instance of NumberSyntaxChecker 066 */ 067 @Override 068 public NumberSyntaxChecker build() 069 { 070 return new NumberSyntaxChecker( oid ); 071 } 072 } 073 074 075 /** 076 * Creates a new instance of NumberSyntaxChecker. 077 * 078 * @param oid The OID to use for this SyntaxChecker 079 */ 080 private NumberSyntaxChecker( String oid ) 081 { 082 super( oid ); 083 } 084 085 086 /** 087 * @return An instance of the Builder for this class 088 */ 089 public static Builder builder() 090 { 091 return new Builder(); 092 } 093 094 095 /** 096 * {@inheritDoc} 097 */ 098 @Override 099 public boolean isValidSyntax( Object value ) 100 { 101 String strValue; 102 103 if ( value == null ) 104 { 105 if ( LOG.isDebugEnabled() ) 106 { 107 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, "null" ) ); 108 } 109 110 return false; 111 } 112 113 if ( value instanceof String ) 114 { 115 strValue = ( String ) value; 116 } 117 else if ( value instanceof byte[] ) 118 { 119 strValue = Strings.utf8ToString( ( byte[] ) value ); 120 } 121 else 122 { 123 strValue = value.toString(); 124 } 125 126 // We should have at least one char 127 if ( strValue.length() == 0 ) 128 { 129 if ( LOG.isDebugEnabled() ) 130 { 131 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 132 } 133 134 return false; 135 } 136 137 // Check that each char is either a digit or a space 138 for ( int i = 0; i < strValue.length(); i++ ) 139 { 140 switch ( strValue.charAt( i ) ) 141 { 142 case '0': 143 case '1': 144 case '2': 145 case '3': 146 case '4': 147 case '5': 148 case '6': 149 case '7': 150 case '8': 151 case '9': 152 continue; 153 154 default: 155 if ( LOG.isDebugEnabled() ) 156 { 157 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 158 } 159 160 return false; 161 } 162 } 163 164 if ( ( strValue.charAt( 0 ) == '0' ) && strValue.length() > 1 ) 165 { 166 // A number can't start with a '0' unless it's the only 167 // number 168 if ( LOG.isDebugEnabled() ) 169 { 170 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 171 } 172 173 return false; 174 } 175 176 if ( LOG.isDebugEnabled() ) 177 { 178 LOG.debug( I18n.msg( I18n.MSG_04489_SYNTAX_VALID, value ) ); 179 } 180 181 return true; 182 } 183}