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; 021 022 023 import org.apache.directory.shared.ldap.entry.Value; 024 import org.apache.directory.shared.ldap.exception.LdapException; 025 import org.apache.directory.shared.ldap.schema.Normalizer; 026 import org.apache.directory.shared.ldap.schema.SchemaManager; 027 import org.apache.directory.shared.ldap.schema.registries.Registries; 028 //import org.apache.directory.shared.ldap.util.SynchronizedLRUMap; 029 030 031 /** 032 * Caches previously normalized values. 033 * 034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 035 * @version $Rev: 928935 $ 036 */ 037 public class CachingNormalizer extends Normalizer 038 { 039 /** The serial UID */ 040 public static final long serialVersionUID = 1L; 041 042 /** Cache maximum size default */ 043 public static final int CACHE_MAX = 250; 044 045 /** Least recently used cache */ 046 //private final SynchronizedLRUMap cache; 047 048 /** The underlying decorated Normalizer */ 049 protected final Normalizer normalizer; 050 051 052 // ------------------------------------------------------------------------ 053 // C O N S T R U C T O R S 054 // ------------------------------------------------------------------------ 055 056 /** 057 * Creates a CachingNormalizer that decorates another normalizer using a 058 * default cache size. This Normalizer delegates 059 * 060 * @param oid The MR OID to use with this Normalizer 061 * @param normalizer the underlying Normalizer being decorated 062 */ 063 public CachingNormalizer( Normalizer normalizer ) 064 { 065 this( normalizer, CACHE_MAX ); 066 } 067 068 069 /** 070 * Creates a CachingNormalizer that decorates another normalizer using a 071 * specified cache size. 072 * 073 * @param normalizer the underlying Normalizer being decorated 074 * @param cacheSz the maximum size of the name cache 075 */ 076 public CachingNormalizer( Normalizer normalizer, int cacheSz ) 077 { 078 super( normalizer.getOid() ); 079 this.normalizer = normalizer; 080 //cache = new SynchronizedLRUMap( cacheSz ); 081 } 082 083 084 /** 085 * Overrides default behavior by returning the OID of the wrapped 086 * Normalizer. 087 */ 088 @Override 089 public String getOid() 090 { 091 return normalizer.getOid(); 092 } 093 094 095 /** 096 * Overrides default behavior by setting the OID of the wrapped Normalizer. 097 * 098 * @param oid the object identifier to set 099 */ 100 @Override 101 public void setOid( String oid ) 102 { 103 super.setOid( oid ); 104 normalizer.setOid( oid ); 105 } 106 107 108 /** 109 * {@inheritDoc} 110 */ 111 public Value<?> normalize( Value<?> value ) throws LdapException 112 { 113 if ( value == null ) 114 { 115 return null; 116 } 117 118 //Value<?> result = ( Value<?> ) cache.get( value ); 119 120 //if ( result != null ) 121 //{ 122 // return result; 123 //} 124 125 Value<?> normalized = normalizer.normalize( value ); 126 //cache.put( value, normalized ); 127 128 return normalized; 129 } 130 131 132 /** 133 * {@inheritDoc} 134 */ 135 public String normalize( String value ) throws LdapException 136 { 137 if ( value == null ) 138 { 139 return null; 140 } 141 142 //String normalized = ( String ) cache.get( value ); 143 144 //if ( normalized != null ) 145 //{ 146 // return normalized; 147 //} 148 149 String normalized = normalizer.normalize( value ); 150 //cache.put( value, normalized ); 151 return normalized; 152 } 153 154 155 /** 156 * {@inheritDoc} 157 */ 158 public void setRegistries( Registries registries ) 159 { 160 normalizer.setRegistries( registries ); 161 } 162 163 164 /** 165 * Sets the SchemaManager 166 * 167 * @param schemaManager The SchemaManager 168 */ 169 public void setSchemaManager( SchemaManager schemaManager ) 170 { 171 normalizer.setSchemaManager( schemaManager ); 172 } 173 }