| /* |
| * 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.core.partition.impl.btree.jdbm; |
| |
| |
| import jdbm.helper.Serializer; |
| |
| import java.io.IOException; |
| |
| |
| /** |
| * A {@link Serializer} for Longs |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class LongSerializer implements Serializer |
| { |
| private static final long serialVersionUID = 237756689544852128L; |
| public static final LongSerializer INSTANCE = new LongSerializer(); |
| |
| |
| public byte[] serialize( Object o ) throws IOException |
| { |
| long id = ( Long ) o; |
| byte[] bites = new byte[8]; |
| |
| bites[0] = ( byte ) ( id >> 56 ); |
| bites[1] = ( byte ) ( id >> 48 ); |
| bites[2] = ( byte ) ( id >> 40 ); |
| bites[3] = ( byte ) ( id >> 32 ); |
| bites[4] = ( byte ) ( id >> 24 ); |
| bites[5] = ( byte ) ( id >> 16 ); |
| bites[6] = ( byte ) ( id >> 8 ); |
| bites[7] = ( byte ) id; |
| |
| return bites; |
| } |
| |
| |
| public Object deserialize( byte[] bites ) throws IOException |
| { |
| long id; |
| id = bites[0] + ( ( bites[0] < 0 ) ? 256 : 0 ); |
| id <<= 8; |
| id += bites[1] + ( ( bites[1] < 0 ) ? 256 : 0 ); |
| id <<= 8; |
| id += bites[2] + ( ( bites[2] < 0 ) ? 256 : 0 ); |
| id <<= 8; |
| id += bites[3] + ( ( bites[3] < 0 ) ? 256 : 0 ); |
| id <<= 8; |
| id += bites[4] + ( ( bites[4] < 0 ) ? 256 : 0 ); |
| id <<= 8; |
| id += bites[5] + ( ( bites[5] < 0 ) ? 256 : 0 ); |
| id <<= 8; |
| id += bites[6] + ( ( bites[6] < 0 ) ? 256 : 0 ); |
| id <<= 8; |
| id += bites[7] + ( ( bites[7] < 0 ) ? 256 : 0 ); |
| return id; |
| } |
| } |