1 /**
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 */
19
20 package org.apache.hadoop.hbase.security.access;
21
22 import java.util.*;
23
24 import org.apache.hadoop.classification.InterfaceAudience;
25
26 /**
27 * A Static Interface.
28 * Instead of having this code in the the HbaseMapWritable code, where it
29 * blocks the possibility of altering the variables and changing their types,
30 * it is put here in this static interface where the static final Maps are
31 * loaded one time. Only byte[] and Cell are supported at this time.
32 * @deprecated In place until we come up on 0.96 and then it can be removed
33 * along with {@link HbaseObjectWritableFor96Migration}; needed to read
34 * pre-0.96 TablePermissions.
35 */
36 @Deprecated
37 @InterfaceAudience.Private
38 interface CodeToClassAndBackFor96Migration {
39 /**
40 * Static map that contains mapping from code to class
41 */
42 Map<Byte, Class<?>> CODE_TO_CLASS =
43 new HashMap<Byte, Class<?>>();
44
45 /**
46 * Static map that contains mapping from class to code
47 */
48 Map<Class<?>, Byte> CLASS_TO_CODE =
49 new HashMap<Class<?>, Byte>();
50
51 /**
52 * Class list for supported classes
53 */
54 Class<?>[] classList = {byte[].class};
55
56 /**
57 * The static loader that is used instead of the static constructor in
58 * HbaseMapWritable.
59 */
60 InternalStaticLoader sl =
61 new InternalStaticLoader(classList, CODE_TO_CLASS, CLASS_TO_CODE);
62
63 /**
64 * Class that loads the static maps with their values.
65 */
66 class InternalStaticLoader{
67 InternalStaticLoader(Class<?>[] classList,
68 Map<Byte,Class<?>> CODE_TO_CLASS, Map<Class<?>, Byte> CLASS_TO_CODE){
69 byte code = 1;
70 for(int i=0; i<classList.length; i++){
71 CLASS_TO_CODE.put(classList[i], code);
72 CODE_TO_CLASS.put(code, classList[i]);
73 code++;
74 }
75 }
76 }
77 }