1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20
21 package org.apache.directory.server.core.shared;
22
23
24 import java.io.IOException;
25
26 import org.apache.directory.api.util.Strings;
27
28 import jdbm.helper.Serializer;
29
30
31 /**
32 * A JDBM Serializer that serializes null or empty strings and always deserializes them as empty string values.
33 *
34 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
35 */
36 public class NullStringSerializer implements Serializer
37 {
38
39 public static final NullStringSerializerd/NullStringSerializer.html#NullStringSerializer">NullStringSerializer INSTANCE = new NullStringSerializer();
40
41
42 @Override
43 public Object deserialize( byte[] data ) throws IOException
44 {
45 return "";
46 }
47
48
49 @Override
50 public byte[] serialize( Object nullStr ) throws IOException
51 {
52 return Strings.EMPTY_BYTES;
53 }
54
55 }