| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.server.xdbm; |
| |
| |
| import org.apache.directory.api.ldap.model.cursor.Tuple; |
| import org.apache.directory.api.ldap.model.entry.Entry; |
| |
| |
| /** |
| * An index id value pair based on a Tuple which can optionally reference the |
| * indexed Entry if one has already been loaded. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @param <V> The key stored in the Tuple, associated key for the object |
| * @param <ID> The ID of the object |
| */ |
| public class IndexEntry<K, ID> |
| { |
| /** The referenced Entry if loaded from the store */ |
| private Entry entry; |
| |
| /** The underlying Tuple */ |
| private final Tuple<K, ID> tuple = new Tuple<K, ID>(); |
| |
| |
| /** |
| * Creates a ForwardIndexEntry instance |
| */ |
| public IndexEntry() |
| { |
| super(); |
| } |
| |
| |
| /** |
| * Sets the key value tuple represented by this ForwardIndexEntry, after having |
| * reset the IndexEntry content (the Entry will now be null) |
| * |
| * @param tuple the tuple for the ForwardIndexEntry |
| */ |
| public void setTuple( Tuple<K, ID> tuple ) |
| { |
| // Clear the entry |
| entry = null; |
| |
| // And inject the tuple key and value |
| this.tuple.setKey( tuple.getKey() ); |
| this.tuple.setValue( tuple.getValue() ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public ID getId() |
| { |
| return tuple.getValue(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public K getKey() |
| { |
| return tuple.getKey(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void setId( ID id ) |
| { |
| tuple.setValue( id ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void setKey( K value ) |
| { |
| tuple.setKey( value ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Entry getEntry() |
| { |
| return entry; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void setEntry( Entry entry ) |
| { |
| this.entry = entry; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Tuple<K, ID> getTuple() |
| { |
| return tuple; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void clear() |
| { |
| entry = null; |
| tuple.setKey( null ); |
| tuple.setValue( null ); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void copy( IndexEntry<K, ID> entry ) |
| { |
| this.entry = entry.getEntry(); |
| tuple.setKey( entry.getKey() ); |
| tuple.setValue( entry.getId() ); |
| } |
| |
| |
| public int hashCode() |
| { |
| if ( getId() == null ) |
| { |
| return 0; |
| } |
| |
| return getId().hashCode(); |
| } |
| |
| |
| public boolean equals( Object that ) |
| { |
| if ( that == this ) |
| { |
| return true; |
| } |
| |
| if ( !( that instanceof IndexEntry ) ) |
| { |
| return false; |
| } |
| |
| @SuppressWarnings("unchecked") |
| IndexEntry<K, ID> thatIndexEntry = ( IndexEntry<K, ID> ) that; |
| |
| if ( thatIndexEntry.getId() == null ) |
| { |
| return getId() == null; |
| } |
| |
| if ( thatIndexEntry.getId().equals( getId() ) ) |
| { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public String toString() |
| { |
| StringBuilder buf = new StringBuilder(); |
| buf.append( "IndexEntry[ " ); |
| buf.append( tuple.getKey() ); |
| buf.append( ", " ); |
| buf.append( tuple.getValue() ); |
| buf.append( " ]" ); |
| |
| return buf.toString(); |
| } |
| } |