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.integration.CacheLoader;
22 import javax.cache.integration.CacheLoaderException;
23 import java.util.HashMap;
24 import java.util.Map;
25
26 public class NoLoader<K, V> implements CacheLoader<K, V>
27 {
28 public static final NoLoader INSTANCE = new NoLoader();
29
30 private NoLoader()
31 {
32 // no-op
33 }
34
35 @Override
36 public V load(K key) throws CacheLoaderException
37 {
38 return null;
39 }
40
41 @Override
42 public Map<K, V> loadAll(final Iterable<? extends K> keys) throws CacheLoaderException
43 {
44 final Map<K, V> entries = new HashMap<K, V>();
45 for (final K k : keys)
46 {
47 entries.put(k, null);
48 }
49 return entries;
50 }
51 }