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.Chars; 027import org.apache.directory.api.util.Strings; 028 029 030/** 031 * A SyntaxChecker which verifies that a value is a valid Java primitive Short or 032 * the Short wrapper. Essentially this constrains the min and max values of 033 * the Short. 034 * <p> 035 * From RFC 4517 : 036 * <pre> 037 * Integer = ( HYPHEN LDIGIT *DIGIT ) | number 038 * 039 * From RFC 4512 : 040 * number = DIGIT | ( LDIGIT 1*DIGIT ) 041 * DIGIT = %x30 | LDIGIT ; "0"-"9" 042 * LDIGIT = %x31-39 ; "1"-"9" 043 * HYPHEN = %x2D ; hyphen ("-") 044 * </pre> 045 * 046 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 047 */ 048@SuppressWarnings("serial") 049public final class JavaShortSyntaxChecker extends SyntaxChecker 050{ 051 /** 052 * A static instance of JavaShortSyntaxChecker 053 */ 054 public static final JavaShortSyntaxChecker INSTANCE = new JavaShortSyntaxChecker( SchemaConstants.JAVA_SHORT_SYNTAX ); 055 056 /** 057 * A static Builder for this class 058 */ 059 public static final class Builder extends SCBuilder<JavaShortSyntaxChecker> 060 { 061 /** 062 * The Builder constructor 063 */ 064 private Builder() 065 { 066 super( SchemaConstants.JAVA_SHORT_SYNTAX ); 067 } 068 069 070 /** 071 * Create a new instance of JavaShortSyntaxChecker 072 * @return A new instance of JavaShortSyntaxChecker 073 */ 074 @Override 075 public JavaShortSyntaxChecker build() 076 { 077 return new JavaShortSyntaxChecker( oid ); 078 } 079 } 080 081 082 /** 083 * Creates a new instance of JavaShortSyntaxChecker. 084 * 085 * @param oid The OID to use for this SyntaxChecker 086 */ 087 private JavaShortSyntaxChecker( String oid ) 088 { 089 super( oid ); 090 } 091 092 093 /** 094 * @return An instance of the Builder for this class 095 */ 096 public static Builder builder() 097 { 098 return new Builder(); 099 } 100 101 102 /** 103 * {@inheritDoc} 104 */ 105 @Override 106 public boolean isValidSyntax( Object value ) 107 { 108 String strValue; 109 110 if ( value == null ) 111 { 112 if ( LOG.isDebugEnabled() ) 113 { 114 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, "null" ) ); 115 } 116 117 return false; 118 } 119 120 if ( value instanceof String ) 121 { 122 strValue = ( String ) value; 123 } 124 else if ( value instanceof byte[] ) 125 { 126 strValue = Strings.utf8ToString( ( byte[] ) value ); 127 } 128 else 129 { 130 strValue = value.toString(); 131 } 132 133 if ( strValue.length() == 0 ) 134 { 135 if ( LOG.isDebugEnabled() ) 136 { 137 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 138 } 139 140 return false; 141 } 142 143 // The first char must be either a '-' or in [0..9]. 144 // If it's a '0', then there should be any other char after 145 int pos = 0; 146 char c = strValue.charAt( pos ); 147 148 if ( c == '-' ) 149 { 150 pos = 1; 151 } 152 else if ( !Chars.isDigit( c ) ) 153 { 154 if ( LOG.isDebugEnabled() ) 155 { 156 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 157 } 158 159 return false; 160 } 161 else if ( c == '0' ) 162 { 163 boolean result = strValue.length() <= 1; 164 165 if ( LOG.isDebugEnabled() ) 166 { 167 if ( result ) 168 { 169 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 170 return false; 171 } 172 else 173 { 174 LOG.debug( I18n.msg( I18n.MSG_04489_SYNTAX_VALID, value ) ); 175 return true; 176 } 177 } 178 179 return result; 180 } 181 182 // We must have at least a digit which is not '0' 183 if ( !Chars.isDigit( strValue, pos ) || Strings.isCharASCII( strValue, pos, '0' ) ) 184 { 185 if ( LOG.isDebugEnabled() ) 186 { 187 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 188 } 189 190 return false; 191 } 192 else 193 { 194 pos++; 195 } 196 197 while ( Chars.isDigit( strValue, pos ) ) 198 { 199 pos++; 200 } 201 202 if ( pos != strValue.length() ) 203 { 204 if ( LOG.isDebugEnabled() ) 205 { 206 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 207 } 208 209 return false; 210 } 211 212 // Should get a NumberFormatException for Byte values out of range 213 try 214 { 215 Short.valueOf( strValue ); 216 217 if ( LOG.isDebugEnabled() ) 218 { 219 LOG.debug( I18n.msg( I18n.MSG_04489_SYNTAX_VALID, value ) ); 220 } 221 222 return true; 223 } 224 catch ( NumberFormatException e ) 225 { 226 if ( LOG.isDebugEnabled() ) 227 { 228 LOG.debug( I18n.err( I18n.ERR_04488_SYNTAX_INVALID, value ) ); 229 } 230 231 return false; 232 } 233 } 234}