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 package org.apache.commons.jcs.jcache;
20
21 import javax.cache.Cache;
22 import javax.cache.processor.MutableEntry;
23
24 public class JCSMutableEntry<K, V> implements MutableEntry<K, V>
25 {
26 private final Cache<K, V> cache;
27 private final K key;
28
29 public JCSMutableEntry(final Cache<K, V> cache, final K key)
30 {
31 this.cache = cache;
32 this.key = key;
33 }
34
35 @Override
36 public boolean exists()
37 {
38 return cache.containsKey(key);
39 }
40
41 @Override
42 public void remove()
43 {
44 cache.remove(key);
45 }
46
47 @Override
48 public void setValue(final V value)
49 {
50 cache.put(key, value);
51 }
52
53 @Override
54 public K getKey()
55 {
56 return key;
57 }
58
59 @Override
60 public V getValue()
61 {
62 return cache.get(key);
63 }
64
65 @Override
66 public <T> T unwrap(final Class<T> clazz)
67 {
68 if (clazz.isInstance(this))
69 {
70 return clazz.cast(this);
71 }
72 throw new IllegalArgumentException(clazz.getName() + " not supported in unwrap");
73 }
74 }