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 */
020 package org.apache.directory.shared.ldap.schema.normalizers;
021
022 import javax.naming.NamingException;
023
024 import org.apache.directory.shared.ldap.constants.SchemaConstants;
025 import org.apache.directory.shared.ldap.entry.Value;
026 import org.apache.directory.shared.ldap.entry.client.ClientStringValue;
027 import org.apache.directory.shared.ldap.schema.Normalizer;
028 import org.apache.directory.shared.ldap.util.StringTools;
029
030
031 /**
032 * A normalizer which transforms an escape sequence into an internal
033 * canonical form: into UTF-8 characters presuming the escape sequence
034 * fits that range. This is used explicity for non-binary attribute
035 * types only.
036 *
037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
038 * @version $Rev$, $Date$
039 */
040 public class DefaultStringNormalizer extends Normalizer
041 {
042 // The serial UID
043 private static final long serialVersionUID = 1L;
044
045 /** A default String normalizer */
046 private static final DefaultStringNormalizer NORMALIZER = new DefaultStringNormalizer();
047
048 protected DefaultStringNormalizer()
049 {
050 // TODO : This is probably not the correct OID ...
051 super( SchemaConstants.CASE_IGNORE_MATCH_MR_OID );
052 }
053
054
055 /**
056 * {@inheritDoc}
057 */
058 public Value<?> normalize( Value<?> value ) throws NamingException
059 {
060 String str = value.getString();
061
062 if ( StringTools.isEmpty( str ) )
063 {
064 return new ClientStringValue( str );
065 }
066
067 return new ClientStringValue( str );
068 }
069
070
071 /**
072 * {@inheritDoc}
073 */
074 public String normalize( String value ) throws NamingException
075 {
076 if ( StringTools.isEmpty( value ) )
077 {
078 return value;
079 }
080
081 return value;
082 }
083
084
085 /**
086 * Normalize the given String
087 *
088 * @param string The string to normalize
089 * @return The normalized object
090 * @throws NamingException If the normalization throws an error
091 */
092 public static String normalizeString( String string ) throws NamingException
093 {
094 return NORMALIZER.normalize( string );
095 }
096 }