| /* |
| * 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 java.io.IOException; |
| |
| import jdbm.helper.Serializer; |
| |
| |
| /** |
| * A custom String serializer to [de]serialize Strings. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class StringSerializer implements Serializer |
| { |
| private static final long serialVersionUID = -173163945773783649L; |
| |
| /** A static instance of a StringSerializer */ |
| public static StringSerializer INSTANCE = new StringSerializer(); |
| |
| |
| /** |
| * Default private constructor |
| */ |
| private StringSerializer() |
| { |
| } |
| |
| |
| /* (non-Javadoc) |
| * @see jdbm.helper.Serializer#deserialize(byte[]) |
| */ |
| public Object deserialize( byte[] bytes ) throws IOException |
| { |
| if ( bytes.length == 0 ) |
| { |
| return ""; |
| } |
| |
| char[] strchars = new char[bytes.length >> 1]; |
| int pos = 0; |
| |
| for ( int i = 0; i < bytes.length; i += 2 ) |
| { |
| strchars[pos++] = ( char ) ( ( ( bytes[i] << 8 ) & 0x0000FF00 ) | ( bytes[i + 1] & 0x000000FF ) ); |
| } |
| |
| return new String( strchars ); |
| } |
| |
| private static final byte[] EMPTY_BYTE_ARRAY = new byte[0]; |
| |
| |
| /* (non-Javadoc) |
| * @see jdbm.helper.Serializer#serialize(java.lang.Object) |
| */ |
| public byte[] serialize( Object str ) throws IOException |
| { |
| if ( ( ( String ) str ).length() == 0 ) |
| { |
| return EMPTY_BYTE_ARRAY; |
| } |
| |
| char[] strchars = ( ( String ) str ).toCharArray(); |
| byte[] bites = new byte[strchars.length << 1]; |
| int pos = 0; |
| |
| for ( char c : strchars ) |
| { |
| bites[pos++] = ( byte ) ( c >> 8 & 0x00FF ); |
| bites[pos++] = ( byte ) ( c & 0x00FF ); |
| } |
| |
| return bites; |
| } |
| } |