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