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.server.core.subtree;
021    
022    
023    import java.util.HashMap;
024    import java.util.Iterator;
025    import java.util.Map;
026    
027    import org.apache.directory.shared.ldap.subtree.SubtreeSpecification;
028    
029    
030    /**
031     * A cache for subtree specifications.
032     *
033     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
034     * @version $Rev$
035     */
036    public class SubentryCache
037    {
038        private final Map<String, Subentry> name2subentry = new HashMap<String, Subentry>();
039        
040        
041        final Subentry getSubentry( String normalizedName )
042        {
043            return name2subentry.get( normalizedName );
044        }
045        
046        
047        final Subentry removeSubentry( String normalizedName )
048        {
049            return  name2subentry.remove( normalizedName );
050        }
051        
052        
053        final Subentry setSubentry( String normalizedName, SubtreeSpecification ss, int types )
054        {
055            Subentry old = name2subentry.get( normalizedName );
056            Subentry subentry = new Subentry();
057            subentry.setSubtreeSpecification( ss );
058            subentry.setTypes( types );
059            name2subentry.put( normalizedName, subentry );
060            return old;
061        }
062        
063        
064        final boolean hasSubentry( String normalizedName )
065        {
066            return name2subentry.containsKey( normalizedName );
067        }
068        
069        
070        final Iterator<String> nameIterator()
071        {
072            return name2subentry.keySet().iterator();
073        }
074    }