1 /**
2 * Copyright 2009-2015 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.apache.ibatis.cache;
17
18 /**
19 * @author Clinton Begin
20 */
21 public final class NullCacheKey extends CacheKey {
22
23 private static final long serialVersionUID = 3704229911977019465L;
24
25 public NullCacheKey() {
26 super();
27 }
28
29 @Override
30 public void update(Object object) {
31 throw new CacheException("Not allowed to update a NullCacheKey instance.");
32 }
33
34 @Override
35 public void updateAll(Object[] objects) {
36 throw new CacheException("Not allowed to update a NullCacheKey instance.");
37 }
38 }