001 /* 002 * CDDL HEADER START 003 * 004 * The contents of this file are subject to the terms of the 005 * Common Development and Distribution License, Version 1.0 only 006 * (the "License"). You may not use this file except in compliance 007 * with the License. 008 * 009 * You can obtain a copy of the license at 010 * trunk/opends/resource/legal-notices/OpenDS.LICENSE 011 * or https://OpenDS.dev.java.net/OpenDS.LICENSE. 012 * See the License for the specific language governing permissions 013 * and limitations under the License. 014 * 015 * When distributing Covered Code, include this CDDL HEADER in each 016 * file and include the License file at 017 * trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable, 018 * add the following below this CDDL HEADER, with the fields enclosed 019 * by brackets "[]" replaced with your own identifying information: 020 * Portions Copyright [yyyy] [name of copyright owner] 021 * 022 * CDDL HEADER END 023 * 024 * 025 * Copyright 2006-2008 Sun Microsystems, Inc. 026 */ 027 package org.opends.server.schema; 028 029 030 031 import java.util.Arrays; 032 033 import org.opends.server.admin.std.server.EqualityMatchingRuleCfg; 034 import org.opends.server.api.EqualityMatchingRule; 035 import org.opends.server.config.ConfigException; 036 import org.opends.server.protocols.asn1.ASN1OctetString; 037 import org.opends.server.types.ByteString; 038 import org.opends.server.types.DirectoryException; 039 import org.opends.server.types.InitializationException; 040 041 import static org.opends.server.schema.SchemaConstants.*; 042 import static org.opends.server.util.StaticUtils.*; 043 044 045 046 /** 047 * This class implements the caseIgnoreListMatch matching rule defined in X.520 048 * and referenced in RFC 2252. 049 */ 050 public class CaseIgnoreListEqualityMatchingRule 051 extends EqualityMatchingRule 052 { 053 /** 054 * Creates a new instance of this caseIgnoreListMatch matching rule. 055 */ 056 public CaseIgnoreListEqualityMatchingRule() 057 { 058 super(); 059 } 060 061 062 063 /** 064 * {@inheritDoc} 065 */ 066 public void initializeMatchingRule(EqualityMatchingRuleCfg configuration) 067 throws ConfigException, InitializationException 068 { 069 // No initialization is required. 070 } 071 072 073 074 /** 075 * Retrieves the common name for this matching rule. 076 * 077 * @return The common name for this matching rule, or <CODE>null</CODE> if 078 * it does not have a name. 079 */ 080 public String getName() 081 { 082 return EMR_CASE_IGNORE_LIST_NAME; 083 } 084 085 086 087 /** 088 * Retrieves the OID for this matching rule. 089 * 090 * @return The OID for this matching rule. 091 */ 092 public String getOID() 093 { 094 return EMR_CASE_IGNORE_LIST_OID; 095 } 096 097 098 099 /** 100 * Retrieves the description for this matching rule. 101 * 102 * @return The description for this matching rule, or <CODE>null</CODE> if 103 * there is none. 104 */ 105 public String getDescription() 106 { 107 // There is no standard description for this matching rule. 108 return null; 109 } 110 111 112 113 /** 114 * Retrieves the OID of the syntax with which this matching rule is 115 * associated. 116 * 117 * @return The OID of the syntax with which this matching rule is associated. 118 */ 119 public String getSyntaxOID() 120 { 121 return SYNTAX_POSTAL_ADDRESS_OID; 122 } 123 124 125 126 /** 127 * Retrieves the normalized form of the provided value, which is best suited 128 * for efficiently performing matching operations on that value. 129 * 130 * @param value The value to be normalized. 131 * 132 * @return The normalized version of the provided value. 133 * 134 * @throws DirectoryException If the provided value is invalid according to 135 * the associated attribute syntax. 136 */ 137 public ByteString normalizeValue(ByteString value) 138 throws DirectoryException 139 { 140 StringBuilder buffer = new StringBuilder(); 141 toLowerCase(value.value(), buffer, true); 142 143 int bufferLength = buffer.length(); 144 if (bufferLength == 0) 145 { 146 if (value.value().length > 0) 147 { 148 // This should only happen if the value is composed entirely of spaces. 149 // In that case, the normalized value is a single space. 150 return new ASN1OctetString(" "); 151 } 152 else 153 { 154 // The value is empty, so it is already normalized. 155 return new ASN1OctetString(); 156 } 157 } 158 159 160 // Replace any consecutive spaces with a single space. Any spaces around a 161 // dollar sign will also be removed. 162 for (int pos = bufferLength-1; pos > 0; pos--) 163 { 164 if (buffer.charAt(pos) == ' ') 165 { 166 char c = buffer.charAt(pos-1); 167 if (c == ' ') 168 { 169 buffer.delete(pos, pos+1); 170 } 171 else if (c == '$') 172 { 173 if ((pos <= 1) || (buffer.charAt(pos-2) != '\\')) 174 { 175 buffer.delete(pos, pos+1); 176 } 177 } 178 else if (buffer.charAt(pos+1) == '$') 179 { 180 buffer.delete(pos, pos+1); 181 } 182 } 183 } 184 185 return new ASN1OctetString(buffer.toString()); 186 } 187 188 189 190 /** 191 * Indicates whether the two provided normalized values are equal to each 192 * other. 193 * 194 * @param value1 The normalized form of the first value to compare. 195 * @param value2 The normalized form of the second value to compare. 196 * 197 * @return <CODE>true</CODE> if the provided values are equal, or 198 * <CODE>false</CODE> if not. 199 */ 200 public boolean areEqual(ByteString value1, ByteString value2) 201 { 202 // Since the values are already normalized, we just need to compare the 203 // associated byte arrays. 204 return Arrays.equals(value1.value(), value2.value()); 205 } 206 } 207